Synthetic ester flavor compounds microwave technology applications
    Aromatic cool in the perfume industry is widely used, it can be directly extracted from plants , industrial salts and halogenated hydrocarbons to aromatic short heating under reflux in an organic solvent from the system. Dingjin Chang et al. Reported without any organic extractant and inorganic carrier conditions, sodium benzoate and halogenated hydrocarbons by microwave radiation, is simple , fast and effective method for the synthesis of aromatic vinegar its advantages as short reaction time , high yield and ease of operation . cinnamon vinegar is an important class of senior spices, widely used in food , daily chemical and other fields. currently cinnamic acid isoamyl industrial production of vinegar with amyl cinnamic acid and concentrated sulfuric acid in a drunk -catalyzed direct esterification formed. This approach has a long reaction time , and would result in a series of side reactions , the reaction complex post-processing , poor product quality , and produce large amounts of waste , environmental pollution and other shortcomings. Yang Haigui such as the use of microwave radiation technology to p-toluenesulfonic acid as a catalyst , using the same starting material was synthesized cinnamic acid isoamyl vinegar optimal reaction conditions , compared with the traditional method of vinegar to shorten the reaction time, vinegar conversion rate , easing the corrosive effects of acid , while reducing environmental pollution , and therefore have potential applications .
    Apple's cool with fresh apple -like aroma , commonly used as spices, can be used to modulate the floral and fruit aromas and flavors . Conventional synthetic is concentrated sulfuric acid, sulfonic acid, heteropoly acid , super acid as the catalyst , the acetyl ethyl acetate vinegar and a few hours after refluxing ethylene glycol ; neutralized , washed, dried and then vacuum distillation. traditional methods long reaction time , operational problems and serious equipment corrosion . Liu Xiaogeng other microwave irradiation and phase transfer catalysis of organic synthesis techniques applied to the synthesis of apple cider vinegar conducted a preliminary exploration [Cii7, synthesis reaction is as follows . study found that microwave radiation phase transfer catalysis reaction is simple apple cider vinegar , not pollute the environment , and the reaction of economic , fast, high yield . and the quality of the final product obtained also in line with spices requirements.
    Coumarin is a versatile interior cool spices since 1886 Perkin was first synthesized coumarin , in order to improve its productivity , it conducted a series of research and study . Huang Jing and other studies of salicylaldehyde and b drunk as raw material , sodium acetate as a catalyst in the synthesis of coumarin under microwave irradiation experiment proved to be a high yield of coumarin , but also greatly shorten the reaction time , and therefore have potential applications .