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Preparation method and application of dimethyl benzyl acetate

A technology of dimethylbenzyl acetate and acetic anhydride is applied in the field of preparation of dimethylbenzyl acetate, and can solve the problems of low total yield of dimethylbenzyl acetate and high economic cost of tetrahydrofuran , to achieve the effect of increasing production volume and increasing safety

Pending Publication Date: 2022-06-28
太仓又绿日化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the tetrahydrofuran economic cost that the used reagent of this method is used is high, and the total yield of the dimethyl benzyl acetate that makes is lower

Method used

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  • Preparation method and application of dimethyl benzyl acetate

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preparation example Construction

[0026] In order to solve the above problems, the first aspect of the present invention provides a preparation method of dimethylbenzyl acetate, the preparation raw materials include benzyl chloride, magnesium powder, acetone, acetic anhydride, toluene, ether, potassium carbonate, so The specific steps of the preparation method are as follows:

[0027] Add magnesium powder to S1 mixed solvent of toluene and ether;

[0028] S2 is added dropwise the mixed substance of benzyl chloride and acetone to react;

[0029] S3 adds potassium carbonate again, adds acetic anhydride again, and heats to reflux;

[0030] S4 is separated and purified to obtain dimethylbenzyl acetate.

[0031] Preferably, the specific steps of the preparation method are as follows:

[0032] Add magnesium powder to S1 mixed solvent of toluene and ether;

[0033] S2 is added dropwise the mixed substance A of benzyl chloride and acetone for 0.5-1h; then the mixed substance B of benzyl chloride and acetone is add...

Embodiment 1

[0055] Provided is a preparation method of dimethylbenzyl acetate, comprising the following steps:

[0056] S1 Mix 140ml of toluene and 60ml of ether, and add 5.6g of magnesium powder;

[0057] S2 was added dropwise 50ml of mixed substance A of benzyl chloride and acetone, reacted at 50°C for 0.5h, wherein the volume of benzyl chloride in mixed substance A was 35ml; then 50ml of mixed substance B of benzyl chloride and acetone was added dropwise, 50 The reaction was carried out at ℃ for 0.5h, wherein the volume of benzyl chloride in the mixed substance B was 15ml;

[0058] Add 5g potassium carbonate to S3, then add 55g acetic anhydride, and heat under reflux for 3h at 105°C;

[0059] S4 is separated and purified to obtain dimethylbenzyl acetate.

[0060] Provided is an application of dimethylbenzyl acetate, which can be used in the fields of food, cosmetics, skin care products, toiletries and fragrances.

Embodiment 2

[0062] Provided is a preparation method of dimethylbenzyl acetate, comprising the following steps:

[0063] S1 Mix 160ml of toluene and 40ml of ether, and add 5.6g of magnesium powder;

[0064] S2 was added dropwise 40ml of mixed substance A of benzyl chloride and acetone, and reacted at 50°C for 0.5h, wherein the volume of benzyl chloride in mixed substance A was 35ml; then 60ml of mixed substance B of benzyl chloride and acetone was added dropwise, and 50 The reaction was carried out at ℃ for 0.5h, wherein the volume of benzyl chloride in the mixed substance B was 15ml;

[0065] Add 5g potassium carbonate to S3, then add 60g acetic anhydride, and heat under reflux for 3h at 110°C;

[0066] S4 is separated and purified to obtain dimethylbenzyl acetate.

[0067] Provided is an application of dimethylbenzyl acetate, which can be used in the fields of food, cosmetics, skin care products, toiletries and fragrances.

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Abstract

The invention relates to the field of spices, in particular to a preparation method and application of dimethyl benzyl acetate. The invention provides a preparation method of dimethyl benzyl acetate, and also provides an application of the dimethyl benzyl acetate. The dimethyl benzyl acetate is obtained by reacting alkoxy magnesium chloride generated by Grignard reaction of benzyl chloride and acetone in a mixed reagent of toluene and diethyl ether with acetic anhydride. The dimethyl benzyl acetate prepared by the method can be applied to the fields of food, cosmetics, skin care products, wash supplies and spices.

Description

technical field [0001] The invention relates to the field of fragrances, in particular to a preparation method of dimethylbenzyl acetate and application thereof. Background technique [0002] Dimethylbenzyl ortho-acetate has a clove aroma with grassy and woody notes, is a soft and fragrant raw material that enhances top and body notes, and dimethylbenzyl acetate as a permissive The edible flavor used can be used to prepare pear, cherry, strawberry and other fruit-type flavors, and is widely used in the fields of daily chemicals, food, spices and the like. [0003] The preparation method of dimethylbenzyl acetate is to generate Grignard reagent through the reaction of benzyl chloride and magnesium, and the Grignard reagent reacts with acetone to generate dimethylbenzyl ortho alcohol after hydrolysis, and dimethylbenzyl ortho alcohol and Acetic anhydride undergoes esterification to produce dimethylbenzyl acetate. Wang Qiufen et al found that using tetrahydrofuran and benzene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/157C07C29/40C07C33/20
CPCC07C29/40C07C67/08C07C33/20C07C69/157
Inventor 黄松鹤
Owner 太仓又绿日化材料有限公司
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