Ester compound with elegant fruity flavor, preparation method of ester compound and fragrant base with elegant fruity flavor

Abstract

The invention relates to the technical field of flavors and fragrances, in particular to an ester compound with elegant fruity flavor, a preparation method of the ester compound and a fragrant base with the elegant fruity flavor. The ester compound with the elegant fruity flavor has the following structural formula: the ester compound with the elegant fruity flavor prepared by the invention is furan-2-yl methanol (E)-(2-hydroxy-3-methylstyryl) carbamate, and the compound has a special elegant fragrance, is accompanied with a tropical fruit fragrance, and is elegant in fragrance and long in fragrance holding time. The preparation method of the compound is simple in process, convenient to operate and control, high in production efficiency and suitable for industrial production. The ester compound with the elegant fruity flavor is added into the prepared fragrant base with the elegant fruity flavor, and compared with the fragrant base without the compound with the elegant fruity flavor, the fragrant base with the elegant fruity flavor has more prominent fruit fragrance, fresh and elegant fragrance and tropical fruit fragrance, and the fragrance quality of the fragrant base is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of flavors and fragrances, and in particular to an ester compound with elegant fruity fragrance, a preparation method thereof, and an elegant fruity fragrance base. Background Art

[0002] Flavors and fragrances, as indispensable additives in modern food, daily chemical, and tobacco industries, play a key role in enhancing product sensory quality and meeting diverse consumer needs. With consumer spending upgrades and market segmentation, the demand for flavor compounds with unique, long-lasting aromas is growing. However, current tropical fruit-flavored fragrances on the market face several technical challenges. First, most products only highlight a single dominant note, lacking the layered aroma and variability characteristic of natural tropical fruits. For example, traditional pineapple flavors primarily rely on pineapple esters (3-4%) to create the primary aroma. While these ingredients provide a distinct pineapple character, they lack the subtle green, sweet, and fermented notes of real pineapples, including secondary but crucial aroma components. Second, tropical fruit flavors generally have a short lasting aroma, which is attributed to their high proportion of volatile components. Ingredients commonly used to create fruity top notes, such as isoamyl acetate (0.05-0.08%) and leaf acetate (0.1-0.3%), while penetrating, lack the persistence required for long-lasting fragrance in high-end perfumes and skincare products. Third, the existing technology has limited ability to coordinate and integrate the aroma of tropical fruits with other aromas, especially when combined with floral, woody, milky, etc., which easily leads to aroma discontinuity or conflict.

[0003] In light of this, the present invention has developed a compound with a unique and elegant aroma, and a tropical fruit aroma with a long-lasting fragrance. This compound is currently not available from domestic or international flavor and fragrance companies. Therefore, this compound has important applications and broad market prospects in the field of perfumery. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide an ester compound with a fresh and elegant fruity aroma. The compound has a special fresh and elegant aroma accompanied by the aroma of tropical fruits. Its aroma is elegant and lasts for a long time, and it has important application value and market prospects in the field of perfumery.

[0005] Another object of the present invention is to provide a method for preparing an ester compound with an elegant fruity aroma, wherein the preparation method has a simple process, is easy to operate and control, has high production efficiency, and is suitable for industrial production.

[0006] Another object of the present invention is to provide a light and elegant fruity fragrance base, which is added with the above-mentioned ester compound with light and elegant fruity fragrance. Compared with the light and elegant fruity fragrance base without the compound added, the light and elegant fruity fragrance base has a more prominent fruity aroma, a fresh and elegant aroma accompanied by the scent of tropical fruits, and the aroma quality of the fragrance base is significantly improved.

[0007] The purpose of the present invention is achieved by the following technical solution: an ester compound with an elegant fruity aroma has the following structural formula:

[0008]

[0009] The ester compound with elegant fruity aroma can be named: furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0010] The ester compound with elegant fruity aroma of the present invention has a special elegant aroma accompanied by the aroma of tropical fruits, and has important uses in the field of daily chemical fragrance preparation.

[0011] Another object of the present invention is achieved by the following technical solution: a method for preparing an ester compound with an elegant fruity aroma, comprising the following steps:

[0012] Step 1: Using β-(2-hydroxy-3-methylbenzene)-acrylic acid as a raw material, prepare β-(2-hydroxy-3-methylbenzene)-acryloyl azide. The structural formula of β-(2-hydroxy-3-methylbenzene)-acrylic acid is shown below:

[0013]

[0014] The structural formula of β-(2-hydroxy-3-methylphenyl)-acryloyl azide is shown below:

[0015]

[0016] Step 2: Using furan methanol and β-(2-hydroxy-3-methylphenyl)-acryloyl azide prepared in step 1 as raw materials, and after separation and purification, an ester compound with a light and elegant fruity aroma is obtained, wherein the ester compound with a light and elegant fruity aroma is furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0017] Furthermore, in step 1, the preparation method of β-(2-hydroxy-3-methylbenzene)-acryloyl azide comprises the following steps:

[0018] A1. Under a nitrogen atmosphere, add the substrate β-(2-hydroxy-3-methylbenzene)-acrylic acid and triethylamine to a reaction flask, then add toluene and diphenylphosphoryl azide in sequence, and react at room temperature for 10-14 hours;

[0019] A2. After the reaction is completed, an appropriate amount of water is added to the reaction flask to quench the reaction, and the organic phase is separated. The organic phase in the aqueous phase is extracted with toluene. After drying and concentration, the two organic phases are combined, and the combined organic phases are separated by silica gel column chromatography to obtain a white solid, that is, β-(2-hydroxy-3-methylbenzene)-acryloyl azide.

[0020] Furthermore, in step A1, under a nitrogen atmosphere, 4-5 mmol of the substrate β-(2-hydroxy-3-methylbenzene)-acrylic acid and 24-25 mmol of triethylamine were added to the reaction flask, and then 10-20 mL of toluene and 5-6 mmol of diphenylphosphoryl azide were added in sequence, and the reaction was carried out at room temperature for 10-14 hours.

[0021] Furthermore, in the step 2, the preparation method of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate comprises the following steps:

[0022] B1. Under argon protection, place hydroquinone, pyridine and furan methanol in a reaction vessel and heat to 90-110°C;

[0023] B2. Dissolve β-(2-hydroxy-3-methylphenyl)-acryloyl azide in toluene and slowly add the solution dropwise to the reaction vessel. Gas will be generated. After the addition is completed, react for 1-3 hours until no gas is generated in the system. Then, evaporate the toluene under reduced pressure. The remaining crude product is separated by silica gel column chromatography to obtain a white solid, thereby preparing furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0024] Furthermore, in step B1, under argon protection, 1-3 mmol of hydroquinone, 2-3 mmol of pyridine and 120-130 mmol of furan methanol are placed in a reaction vessel and the temperature is raised to 90-110°C.

[0025] Furthermore, in step B2, the amount of β-(2-hydroxy-3-methylphenyl)-acryloyl azide added is 40-50 mmol.

[0026] Another object of the present invention is achieved by the following technical solution: a light and elegant fruity aroma base, comprising the following raw materials in parts by weight: 8-12 parts of phenylethyl alcohol, 3-8 parts of vanillin, 20-30 parts of isoamyl acetate, 3-8 parts of ethyl hexanoate, 8-12 parts of geranyl acetate, 12-16 parts of citronellol, 18-22 parts of ethyl butyrate, 2-6 parts of isoamyl butyrate, 77-83 parts of eugenol, 20-30 parts of benzyl alcohol, 28-32 parts of privet aldehyde, 6-10 parts of diethyl phthalate, 25-32 parts of ethyl heptanoate, 45-55 parts of allyl 3-cyclohexylpropionate, 6-10 parts of decanal, 45-55 parts of furan-2-ylmethanol (E)-(2-hydroxy-3-methylstyryl)carbamate, and 600-700 parts of propylene glycol.

[0027] The beneficial effects of the present invention are as follows: the ester compound with elegant fruity aroma prepared by the present invention is furan-2-ylmethanol (E)-(2-hydroxy-3-methylstyryl)carbamate, and the compound is prepared by a key acyl azide preparation reaction and a Curtius rearrangement reaction. It has a special elegant aroma, accompanied by the aroma of tropical fruits, elegant fragrance, long lasting fragrance time, and has important application value and market prospects in the field of perfumery. The preparation method of the compound is simple in process, easy to operate and control, high in production efficiency, and suitable for industrial production. The elegant fruity aroma base prepared by the present invention is added with the above-mentioned ester compound with elegant fruity aroma. Compared with the elegant fruity aroma base without the addition of the compound, it has a more prominent fruity aroma, a fresh and elegant aroma, and is accompanied by the aroma of tropical fruits, and the aroma quality of the fragrance base is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the hydrogen spectrum of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate prepared in Example 1.

[0029] Figure 2 This is the carbon spectrum of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate prepared in Example 1.

[0030] Figure 3 This is a gas chromatogram of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate prepared in Example 1. DETAILED DESCRIPTION

[0031] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0032] In an embodiment of the present invention, an ester compound with an elegant fruity aroma has the following structural formula:

[0033]

[0034] The ester compound with elegant fruity aroma can be named: furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0035] In an embodiment of the present invention, a method for preparing an ester compound having an elegant fruity aroma comprises the following steps:

[0036] Step 1: Using β-(2-hydroxy-3-methylbenzene)-acrylic acid as a raw material, prepare β-(2-hydroxy-3-methylbenzene)-acryloyl azide. The structural formula of β-(2-hydroxy-3-methylbenzene)-acrylic acid is shown below:

[0037]

[0038] The structural formula of β-(2-hydroxy-3-methylphenyl)-acryloyl azide is shown below:

[0039]

[0040] Step 2: Using furan methanol and β-(2-hydroxy-3-methylphenyl)-acryloyl azide prepared in step 1 as raw materials, and after separation and purification, an ester compound with a light and elegant fruity aroma is obtained, wherein the ester compound with a light and elegant fruity aroma is furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0041] Furthermore, in step 1, the preparation method of β-(2-hydroxy-3-methylbenzene)-acryloyl azide comprises the following steps:

[0042] A1. Under a nitrogen atmosphere, add the substrate β-(2-hydroxy-3-methylbenzene)-acrylic acid and triethylamine to a reaction flask, then add toluene and diphenylphosphoryl azide in sequence, and react at room temperature for 10-14 hours;

[0043] A2. After the reaction is completed, an appropriate amount of water is added to the reaction flask to quench the reaction, and the organic phase is separated. The organic phase in the aqueous phase is extracted with toluene. After drying and concentration, the two organic phases are combined, and the combined organic phases are separated by silica gel column chromatography to obtain a white solid, that is, β-(2-hydroxy-3-methylbenzene)-acryloyl azide.

[0044] Furthermore, under a nitrogen atmosphere, 4-5 mmol of substrate β-(2-hydroxy-3-methylbenzene)-acrylic acid and 24-25 mmol of triethylamine were added to the reaction flask, and then 10-20 mL of toluene and 5-6 mmol of diphenylphosphoryl azide were added in sequence, and the reaction was carried out at room temperature for 10-14 hours.

[0045] Furthermore, in the step 2, the preparation method of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate comprises the following steps:

[0046] In the step 2, the preparation method of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate comprises the following steps:

[0047] B1. Under argon protection, place hydroquinone, pyridine and furan methanol in a reaction vessel and heat to 90-110°C;

[0048] B2. Dissolve β-(2-hydroxy-3-methylphenyl)-acryloyl azide in toluene and slowly add the solution dropwise to the reaction vessel. Gas will be generated. After the addition is completed, react for 1-3 hours until no gas is generated in the system. Then, evaporate the toluene under reduced pressure. The remaining crude product is separated by silica gel column chromatography to obtain a white solid, thereby preparing furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0049] Furthermore, under argon protection, 1-3 mmol of hydroquinone, 2-3 mmol of pyridine and 120-130 mmol of furan methanol were placed in a reaction vessel, and the temperature was raised to 90-110°C.

[0050] Furthermore, in step B2, the amount of β-(2-hydroxy-3-methylphenyl)-acryloyl azide added is 40-50 mmol.

[0051] In some embodiments of the present invention, a light and elegant fruity aroma base comprises the following raw materials in parts by weight: 8-12 parts of phenylethyl alcohol, 3-8 parts of vanillin, 20-30 parts of isoamyl acetate, 3-8 parts of ethyl hexanoate, 8-12 parts of geranyl acetate, 12-16 parts of citronellol, 18-22 parts of ethyl butyrate, 2-6 parts of isoamyl butyrate, 77-83 parts of eugenol, 20-30 parts of benzyl alcohol, 28-32 parts of privet aldehyde, 6-10 parts of diethyl phthalate, 25-32 parts of ethyl heptanoate, 45-55 parts of allyl 3-cyclohexylpropionate, 6-10 parts of decanal, 45-55 parts of furan-2-ylmethanol (E)-(2-hydroxy-3-methylstyryl)carbamate, and 600-700 parts of propylene glycol.

[0052] In a typical embodiment of the present invention, a light and elegant fruity aroma base comprises the following raw materials in parts by weight: 10 parts of phenylethyl alcohol, 5 parts of vanillin, 25 parts of isoamyl acetate, 5 parts of ethyl hexanoate, 10 parts of geranyl acetate, 14 parts of citronellol, 20 parts of ethyl butyrate, 4 parts of isoamyl butyrate, 80 parts of eugenol, 25 parts of benzyl alcohol, 30 parts of privet aldehyde, 8 parts of diethyl phthalate, 30 parts of ethyl heptanoate, 50 parts of allyl 3-cyclohexylpropionate, 8 parts of decanal, 50 parts of furan-2-ylmethanol (E)-(2-hydroxy-3-methylstyryl)carbamate, and 626 parts of propylene glycol.

[0053] Example 1

[0054] This embodiment provides an ester compound with an elegant fruity aroma, having the following structural formula:

[0055]

[0056] The chemical name of the ester compound with elegant fruity aroma is furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

[0057] The preparation method of the ester compound with elegant fruity fragrance comprises the following steps:

[0058] Step 1: Prepare β-(2-hydroxy-3-methylbenzene)-acryloyl azide. The chemical reaction formula for the preparation of β-(2-hydroxy-3-methylbenzene)-acryloyl azide is as follows:

[0059]

[0060] A1. Under a nitrogen atmosphere, add the substrate β-(2-hydroxy-3-methylphenyl)-acrylic acid (864 mg, 4.85 mmol, 1.0 equiv) and triethylamine (3.37 mL, 24.23 mmol, 5.0 equiv) to a reaction flask, followed by the addition of toluene (15 mL) and diphenylphosphoryl azide DPPA (1.25 mL, 5.81 mmol, 1.2 equiv), and react at room temperature for 12 hours. The structural formula of β-(2-hydroxy-3-methylphenyl)-acrylic acid is shown in Formula 1.

[0061] A2. After the reaction, water (15 mL) was added to the reaction flask to quench the reaction. The organic phase was separated and the organic phase in the aqueous phase was extracted with toluene (2×15 mL). The two organic phases were dried and concentrated, and the combined organic phases were separated by silica gel column chromatography (silica gel, Hex / EA=5:1) to obtain 787 mg of a white solid, i.e., β-(2-hydroxy-3-methylbenzene)-acryloyl azide, with a yield of 79%. β-(2-hydroxy-3-methylbenzene)-acryloyl azide is shown in Formula 2, which has the following NMR spectral characteristics:

[0062] 1 H NMR (400MHz, CDCl3) δ7.54(d,J=12.7Hz,1H),7.37(td,J=8.0,7.2Hz,1H),7.15( m,1H),6.95(t,J=7.72Hz,1H),6.47(d,J=12.7Hz,1H),5.7(s,1H),2.21(s,3H).;

[0063] 13 C NMR (100MHz, CDCl3) δ175.6,152.1,146.1,133.7,127.5,125.8,125.7,125.2,120.4,18.1.

[0064] The mass spectrometry analysis data are as follows:

[0065] HRMS (ESI / [M+H] + ); High-resolution electrospray ionization mass spectrometry theoretical calculation data is C 10 H 10 N3O2: 204.0768, actual measured value 204.0762 (HRMS (ESI / [M+H] + )calculated for C 10 H 10 N3O2:204.0768,found204.0762.).

[0066] Step 2: Preparation of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate. The chemical reaction formula for the preparation of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate is as follows:

[0067]

[0068] B1. Under argon protection, hydroquinone (225 mg, 2 mmol, 0.05 equiv), pyridine (0.2 mL, 2.4 mmol, 0.06 equiv), and furan methanol (10.5 mL, 122.7 mmol, 3.0 equiv) were placed in a reaction vessel and heated to 100°C.

[0069] B2. β-(2-Hydroxy-3-methylphenyl)-acryloyl azide (8.3 g, 40.9 mmol, 1.0 equiv) was dissolved in toluene (150 mL) and slowly added dropwise to the reaction vessel. Gas was generated. After 2 hours of reaction, no gas was generated. Toluene was then evaporated under reduced pressure. The remaining crude product was separated by silica gel column chromatography (Hex / DCM=1:1) to obtain 8.96 g of a white solid, namely furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate, with a yield of 80%. The melting point of the white solid was measured to be 148°C.

[0070] The furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate prepared in this example has the following NMR spectral characteristics:

[0071] 1 H NMR (400MHz, CDCl3) δ8.30 (d, J = 10.8Hz, 1H), 7.43 (s, 1H), 7.29-7.17 (m, 1H), 7.03-6.71(m,3H),6.61-6.29(m,2H),5.85(s,1H),5.18(s,2H),2.24(s,3H).;

[0072] 13 C NMR (101MHz, CDCl3) δ154.8,151.3,147.6,144.9,144.0,140.9,132.0,123.6,114.9,112.1,110.8,60.6,19.6.

[0073] The mass spectrometry analysis data are as follows:

[0074] HRMS (ESI / [M+Na] + ) High-resolution electrospray ionization mass spectrometry theoretical calculation data is C 15 H 15 NO4Na: 296.0893, the actual measured value is 296.0890 (HRMS (ESI / [M+Na] + )calculated for C 15 H 15NO4Na:296.0893,found 296.0890.).

[0075] Example 2

[0076] The furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate prepared in Example 1 was subjected to aroma rating, fragrance retention test and fragrance base aroma test. The test results are as follows:

[0077] (1) Aroma evaluation: Eleven perfumers with more than five years of work experience gave the following evaluation on the aroma of the compound: All 11 perfumers agreed that in addition to the characteristic fruity aroma, the compound also has a special fresh and elegant aroma with a tropical fruit aroma.

[0078] (2) Fragrance retention test: Prepare a 10% propylene glycol solution of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate, dip a scent test paper into an appropriate amount of the solution, place the test paper on a scent rack, and have three perfumers smell the scent once every two hours. When two or more perfumers cannot perceive the fragrance of the scent test paper, the fragrance retention time is recorded.

[0079] The fragrance lasting test shows that the elegant fruity fragrance of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate lasts for 20 hours, and the special aromatic smell and tropical fruit fragrance last for 48 hours.

[0080] (3) Fragrance base aroma test: The formula of elegant fruity fragrance base is shown in the following table:

[0081]

[0082] According to the formula in the above table, fragrance base A and fragrance base B were prepared. The parts of each raw material in the table are by weight. 50 parts of the target product of the present invention, furan-2-ylmethanol (E)-(2-hydroxy-3-methylstyryl)carbamate, were added to fragrance base A and fragrance base B. After evaluating the above fragrance bases, 10 perfumers with more than 5 years of work experience made the following comments: The 10 perfumers unanimously agreed that fragrance base B has a more prominent fruity aroma than fragrance base A, and the aroma is fresh and elegant with a tropical fruit aroma, and the aroma quality of the fragrance base is significantly improved.

[0083] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. An ester compound with an elegant fruity aroma, characterized in that: It has the following structural formula:

2. A method for preparing an ester compound having an elegant fruity aroma as claimed in claim 1, characterized in that: The steps include: Step 1: Using β-(2-hydroxy-3-methylbenzene)-acrylic acid as a raw material, prepare β-(2-hydroxy-3-methylbenzene)-acryloyl azide. The structural formula of β-(2-hydroxy-3-methylbenzene)-acrylic acid is shown below: The structural formula of β-(2-hydroxy-3-methylphenyl)-acryloyl azide is shown below: Step 2: Using furan methanol and β-(2-hydroxy-3-methylphenyl)-acryloyl azide prepared in step 1 as raw materials, and after separation and purification, an ester compound with a light and elegant fruity aroma is obtained, wherein the ester compound with a light and elegant fruity aroma is furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

3. The method for preparing an ester compound having an elegant fruity aroma according to claim 2, wherein: In the step 1, the preparation method of β-(2-hydroxy-3-methylbenzene)-acryloyl azide comprises the following steps: A1. Under a nitrogen atmosphere, add the substrate β-(2-hydroxy-3-methylbenzene)-acrylic acid and triethylamine to a reaction flask, then add toluene and diphenylphosphoryl azide in sequence, and react at room temperature for 10-14 hours; A2. After the reaction is completed, an appropriate amount of water is added to the reaction flask to quench the reaction, and the organic phase is separated. The organic phase in the aqueous phase is extracted with toluene. After drying and concentration, the two organic phases are combined, and the combined organic phases are separated by silica gel column chromatography to obtain a white solid, that is, β-(2-hydroxy-3-methylbenzene)-acryloyl azide.

4. The method for preparing an ester compound having an elegant fruity aroma according to claim 3, wherein: In the step A1, under a nitrogen atmosphere, 4-5 mmol of a substrate β-(2-hydroxy-3-methylphenyl)-acrylic acid and 24-25 mmol of triethylamine were added to a reaction flask, and then 10-20 mL of toluene and 5-6 mmol of diphenylphosphoryl azide were added in sequence, and the mixture was reacted at room temperature for 10-14 hours.

5. The method for preparing an ester compound having an elegant fruity aroma according to claim 2, wherein: In the step 2, the preparation method of furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate comprises the following steps: B1. Under argon protection, place hydroquinone, pyridine and furan methanol in a reaction vessel and heat to 90-110°C; B2. Dissolve β-(2-hydroxy-3-methylphenyl)-acryloyl azide in toluene and slowly add the solution dropwise to the reaction vessel. Gas will be generated. After the addition is completed, react for 1-3 hours until no gas is generated in the system. Then, evaporate the toluene under reduced pressure. The remaining crude product is separated by silica gel column chromatography to obtain a white solid, thereby preparing furan-2-ylmethanol (E)-(2-hydroxy-3-methylphenyl)carbamate.

6. The method for preparing an ester compound having an elegant fruity aroma according to claim 5, wherein: In the step B1, under argon protection, 1-3 mmol of hydroquinone, 2-3 mmol of pyridine and 120-130 mmol of furan methanol are placed in a reaction vessel and the temperature is raised to 90-110°C.

7. The method for preparing an ester compound having an elegant fruity aroma according to claim 5, wherein: In the step B2, the amount of β-(2-hydroxy-3-methylbenzene)-acryloyl azide added is 40-50 mmol.

8. An elegant fruity fragrance base, characterized by: The invention comprises the following raw materials in parts by weight: 8-12 parts of phenylethyl alcohol, 3-8 parts of vanillin, 20-30 parts of isoamyl acetate, 3-8 parts of ethyl hexanoate, 8-12 parts of geranyl acetate, 12-16 parts of citronellol, 18-22 parts of ethyl butyrate, 2-6 parts of isoamyl butyrate, 77-83 parts of eugenol, 20-30 parts of benzyl alcohol, 28-32 parts of privet aldehyde, 6-10 parts of diethyl phthalate, 25-32 parts of ethyl heptanoate, 45-55 parts of allyl 3-cyclohexylpropionate, 6-10 parts of decanal, 45-55 parts of furan-2-ylmethanol (E)-(2-hydroxy-3-methylstyryl)carbamate, and 600-700 parts of propylene glycol.

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