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Preparation method of essence with jasmine fragrance

An essence and aroma technology, applied in the field of perfume preparation, can solve problems such as side reactions, and achieve the effects of low cost, easy availability of raw materials and soft smell

Inactive Publication Date: 2012-07-11
HUABAO FLAVOURS & FRAGRANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, these reagents can produce many side reactions

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Add 0.2mol jasmone and 0.1mol Lawson's reagent into the long-necked flask, in which magnetic stirring beads are placed, and a condenser is connected to the mouth of the flask. After the flask is fixed with an iron stand, the condenser is fed into the Water, put the flask on a magnetic stirrer, turn on the magnetic stirring and heating, control the temperature at 40°C, and the rotation speed is 300 rpm, thus obtaining 65mL of a uniformly mixed solution;

[0040] (2) irradiate the 65ml solution obtained in step (1) with a microwave with an intensity of 250w for 7min, then stop the microwave irradiation, continue the reaction for 3h, then stop the reaction, and leave the reaction solution to cool;

[0041] (3) Add 200ml of dichloromethane to the cooling reaction solution obtained in step (2) as an extractant, extract to obtain 260ml of organic phase, and then use vacuum distillation to concentrate the organic phase at a pressure of 0.9mpa and a temperature of 40°C. Con...

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PUM

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Abstract

The invention relates to a preparation method of an essence with jasmine fragrance. The method comprises the following steps of: mixing jasmine with a Lawson reagent under condensing and stirring actions; performing microwave irradiation; and extracting and concentrating to obtain the essence with jasmine fragrance. The method is applied to a sulfur ketonization reaction under the action of microwave assistance, and jasmine is taken as a raw material, so that a jasmine essence with typical softer jasmine fragrance is synthesized. The essence contains high-concentration 3-methyl-2-(2-pentenyl)-2-cyclopentene-1-thioketone. The preparation method disclosed by the invention has the advantages of readily-available raw materials, low cost, hybrid reaction and easiness for operating.

Description

【Technical field】 [0001] The invention belongs to the field of perfume preparation. More specifically, the present invention relates to a preparation method of an essence with jasmine aroma, and the essence with jasmine aroma obtained according to the preparation method. 【Background technique】 [0002] Thione compounds containing carbonyl groups are attracting more and more attention because of their great application value in biology and commerce, and can be used as precursors in the synthesis of many organic compounds, such as ketones, flavones, lactones, amino Products of thiocarbonylation of compounds and esters. Usually the chemical oxygen-sulfur exchange method is used to replace the oxygen atoms on the carbonyl compound, and aromatic hydrocarbons are used as solvents, such as benzene, toluene, xylene, etc., but the reaction takes a long time, and an excessive amount of thiolation reagent is usually added , and accompanied by many side reactions, most of which consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C325/02
Inventor 谷向春潘璐潇
Owner HUABAO FLAVOURS & FRAGRANCES CO LTD
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