ausgehend vomα-Cyclogeraniumsäure-äthylester(I)wurdeüberden 4-乙酰氧基-β-cyclogeraniumsäure-äthylester(II),den4-Oxy-β-cyclogeraniumsäureester(III),Safransäure-äthylester(V)和Safranals dafr nach einer neuen合成hergestellt。2,3,6-Trimethyl-benzaldehyd。
ausgehend vomα-Cyclogeraniumsäure-äthylester(I)wurdeüberden 4-乙酰氧基-β-cyclogeraniumsäure-äthylester(II),den4-Oxy-β-cyclogeraniumsäureester(III),Safransäure-äthylester(V)和Safranals dafr nach einer neuen合成hergestellt。2,3,6-Trimethyl-benzaldehyd。
Meta-Substituted 3-phenylpropanal derivatives useful in providing watery-marine, floral- aldehydic notes.
甲基取代的3-苯丙醛衍生物可用于提供水性海洋、花香醛调。
Synthetic Studies on Damascenones
作者:G. Büchi、H. Wüest
DOI:10.1002/hlca.19710540704
日期:1971.11.1
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.
Preparation of alkyl 3-methylalka-2,4-dienoates from γ,δ-unsaturated β-keto esters via the corresponding conjugated unsaturated 3-enol phosphates
作者:Cornelis M. Moorhoff、David F. Schneider
DOI:10.1016/s0040-4020(98)00071-4
日期:1998.3
Methylation of α,β,γ,δ-unsaturated-β-substituted enol phosphates with lithium dimethyl cuprate gave a mixture of (2E,4E)- and (2Z,4E) alkyl 3-methylalka-2,4-dienoates and unsubstituted alkyl alka-2,4-dienoates. An improved synthesis is described for ethyl β-safranate and the insect growth regulator hydroprene.
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。
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.