33281-91-3Relevant articles and documents
A Green and Sustainable Approach: Celebrating the 30th Anniversary of the Asymmetric l-Menthol Process
Emura, Makoto,Matsuda, Hiroyuki
, p. 1688 - 1699 (2014)
Takasago has been devoted to producing l-menthol since 1954, and our long history of manufacturing this important aroma chemical is reviewed here. The current asymmetric catalytic process had its 30th anniversary in 2013. Our l-menthol process is consider
A director menthones and sodium sulfide by preparing edible essence 8-mercapto malaya alkone method
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Paragraph 0026-0028, (2017/04/11)
The invention relates to a method for preparing edible essence 8-mercaptomenthone from pulegone and sodium sulfide. The method utilizes sodium sulfide, potassium sulfide or ammonium sulfide as a raw material. Compared with the prior art, the method does not use toxic gas H2S, is free of multiple complicated processes, has high operation safety and is environmentally friendly. The method has a high 8-mercaptomenthone yield, simple processes and mild reaction conditions, is suitable for industrial production and solves the problems of a low yield of the prior art.
Determination and isolation of a thioesterase from passion fruit (Passiflora edulis Sims) that hydrolyzes volatile thioesters
Tapp, Edward J.,Cummins, Ian,Brassington, David,Edwards, Robert
experimental part, p. 6623 - 6630 (2010/04/06)
Volatile organosulfur compounds (VOSCs) are high impact aroma chemicals characteristic of tropical fruits which are active as both free thiols and the respective thioesters. Using a simple and sensitive colorimetric enzyme assay, a thioesterase activity toward VOSCs has been identified in ripening purple passion fruit (Passiflora edulis Sims). The assay was based on determining the release of free thiols from 2-methyl-3-furanthiol acetate using Ellman's reagent. The major thioesterase in the fruit was found to be a wall-bound protein in the mesocarp. The extracted enzyme activity was purified 150-fold and shown to be associated with a 43 kDa monomeric serine hydrolase which was selectively labeled with a fluorophosphonate suicide probe. MS-MS sequencing identified the thioesterase as a class 13 glycoside hydrolase, most similar to pectin acetylesterase, an enzyme involved in cell wall modifications in the peel of a number of fruit. Our results suggest that cell wall hydrolases in tropical fruit may have additional useful roles in biotransforming VOSCs.