6 results about "Hexacosenoic acid" patented technology

The invention discloses a synthesis method of piperonone, and relates to the technical field of flavors, fragrances and chemical engineering, and the synthesis method comprises the following steps: taking acrylate as a raw material, and carrying out Michael addition reaction with isobutene under the action of Lewis acid to obtain 5-methyl-5-hexenoic acid ethyl ester; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on ethyl 5-methyl-5-hexenoate and bromoisopropane under the action of a basic catalyst to obtain ethyl 5-methyl-2-isopropyl-5-hexenoate; carrying out self Friedel-Crafts acylation reaction on the 5-methyl-2-isopropyl-5-hexenoic acid ethyl ester under the action of Lewis acid, so as to obtain 5-methyl-2-isopropyl-5-chloro cyclohexanone; and carrying out elimination reaction on the 5-methyl-2-isopropyl-5-chlorocyclohexanone under the action of alkali to obtain the product piperonone. According to the synthetic route, conventional chemical reagents are used as raw materials, reaction conditions are mild, emission of three wastes is reduced to a great extent, and the synthetic route is more environmentally friendly and suitable for continuous industrial production.

The invention discloses an acidic emulsified liquid seasoning, and relates to a low-calorie sesame-containing acidic emulsified liquid seasoning, and although the acidic emulsified liquid seasoning does not contain cane sugar, the strong and mellow sesame flavor can be felt. The present invention relates to an acidic emulsified liquid seasoning which does not contain sucrose and contains sesame, edible fat and oil, an emulsifier and a sour material. In addition, the acidic emulsion liquid seasoning according to the present invention is characterized by further comprising an ethyl 3-hexenoate (Ethyl 3-hexenoate).

The present invention provides a related substance of (3S)-3-(4-(3-(1,4-dioxaspiro[4,5]dec-7-en-8-yl)benzyloxy)phenyl)hex-4-inoic acid, and a method for evaluating the quality of (3S)-3-(4-(3-(1,4-dioxaspiro[4,5]dec-7-en yl)benzyloxy)phenyl)hex-4-inoic acid using the same. According to the present invention, it is possible to evaluate the quality, stability and the like of a pharmaceutical composition comprising (3S)-3-(4-(3-(1,4-dioxaspiro[4,5]dec-7-en-8-yl)benzyloxy)phenyl)hex-4-inoic acid using a compound of Chemical Formula 2 or a salt thereof as a reference standard.

The invention discloses pentaerythritol tetra (6-naphthyl hexanoic acid) ester and a preparation method and application thereof, the preparation method adopts two-step reaction of alkylation and esterification, the first step is that naphthalene and 5-hexenoic acid are subjected to alkylation reaction to generate 6-(1-naphthyl) hexanoic acid; and 2, carrying out a reaction on the 6-(1-naphthyl) hexanoic acid and thionyl chloride, and carrying out an esterification reaction with pentaerythritol to finally obtain the oily pentaerythritol tetra (6-naphthyl hexanoic acid) ester. The prepared pentaerythritol tetra (6-naphthyl hexanoate) ester has a structure with a symmetric four-arm core, a flexible alkyl chain and a rigid naphthalene end group, is shown as a formula (I), is used for lubrication and sealing of various equipment, and has the advantages of oxidation resistance, high and low temperature resistance, extreme pressure resistance, good lubrication and sealing performance and the like.

The present application relates to the field of analytical test technology, and particularly provides a reagent and method for separating and analyzing C=C double bond position isomerism based on crown ether, which comprises: separating and analyzing 2 / 3-butenoic acid (BA), 2 / 3 / 4-pentenoic acid (PA) and 2 / 3 / 5-hexenoic acid (HA) isomers respectively, mixing the above unsaturated isomers with crown ethers including 18 crown 6 (18C6), 15 crown 5 (15C5), 12 crown 4 (12C4) and divalent metal ions to form a mixed solution, and then separating and analyzing the mixed solution by means of ion mobility mass spectrometry. The ion mobility mass spectrometry experiment shows that the molecules can form ternary complexes of crown ether-isomer-metal ion through non-covalent interaction, and the C=C position isomerism can be simultaneously separated through the formed complexes. The analytical reagent and method provided by the present application are simple, accurate and fast in analysis speed, and do not need chemical derivatization, chromatographic separation and other previous steps, and the method can be used for separating different C=C double bond position isomers.

We aim to provide a beverage that improves the balance between the characteristics of red grapes and the intensity of sweetness. [Solution] The red grape-flavored beverage of the present invention has an ethyl 3-hexenoate concentration of 0.25 to 6.0 ppb.