Cycloaliphatic unsaturated ketones as fragrance modifying agents
申请人:Firmenich S.A.
公开号:US04028278A1
公开(公告)日:1977-06-07
New cycloaliphatic unsaturated ketones and their use as perfuming and odor-modifying agents in the manufacture of perfumes and perfumed products, and as flavoring and taste-modifying agents in the preparation of foodstuffs in general and imitation flavors for foodstuffs, beverages, animal feeds, pharmaceutical preparations and tobacco products. Methods for preparing the said new compounds and certain of the starting materials used for their synthesis.
Taxol synthesis: Synthesis of A-ring and a methodology for substituted cyclohexadienes
作者:J.S. Jadav、Dale Srinivas
DOI:10.1016/s0040-4039(97)10038-7
日期:1997.11
A fully functionalised synthesis of taxolA-ring, through Michael/Wittig reaction and regioselective opening epoxide as key steps and also a methodology for substituted cyclohexadienes through tandem Michael/Wittig reaction is described.
been prepared by treatment of the corresponding ethyl safranates with excess allyl lithium followed by alkoxide catalyzed isomerization of the resulting products with β, γ-unsaturated ketonic side chains. Addition of allyltriphenylphosphorane (preferably prepared from allyltriphenylphosphonium chloride) rather than the propenyl isomer to ethyl α-isopropylidene-acetoacetate produced ethyl α-safranate.
Cyclohexadienes are produced by heating in the presence of an organic solvent a compound of the formula: ##EQU1## wherein X is either --COCH.sub.3 or --COOR.sub.1, R.sub.1 is a lower alkyl group. The preferred cyclohexadienes are useful as intermediates in the preparation of odorants.
在有机溶剂存在下加热以下化合物可以产生环己二烯:##EQU1## 其中 X 为 --COCH.sub.3 或 --COOR.sub.1,R.sub.1 为低碳基。首选的环己二烯可用作香料制备中间体。
Microcapsules
申请人:Takasago International Corporation
公开号:EP2832440A1
公开(公告)日:2015-02-04
The present disclosure discloses a novel microcapsule which is endowed for example with reduced leakage of encapsulated materials. The microcapsule contains one or more fragrances and is suitable for inclusion in non-edible consumer goods products, laundry products, personal care products and cosmetic products. The microcapsule can be obtained in an economic and efficient manner by polymerizing an emulsion so that emulsion droplets are encapsulated into a subsequently cured polymeric shell.