THE BIRCH REDUCTION OF 2-ACYLTHIOPHENES. SYNTHESIS OF 1,3-DIENYL KETONES FROM 2-ACYLTHIOPHENES
作者:Kimihiko Kosugi、Alexander V. Anisimov、Hiroshi Yamamoto、Ryuichi Yamashiro、Kozo Shirai、Takanobu Kumamoto
DOI:10.1246/cl.1981.1341
日期:1981.10.5
The Birchreduction of 2-acyl or 2-acyl-5-alkylthiophenes and subsequent alkylation by alkyl halides gave 2-acyl-2-alkyl or 2-acyl-2,5-dialkyl-2,5-dihydrothiophenes in good yields. Further, 1,3-dienyl ketones were obtained in good yields by the thermolysis of 2,5-dihydrothiophene 1,1-dioxides which were obtained by the oxidation of resulted dihydrothiophene derivatives with m-chloroperbenzoic acid
作者:Dario Dragas、Hanafi Tanojo、Johannes Brussee、Hans E. Junginger、Harry E. Boddé
DOI:10.1002/ardp.19963291008
日期:——
branched fatty acids are of great interest in the search of a new type of drug penetration enhancers across human skin for transdermal drug delivery and in gaining an understanding of structure‐activity relationships with skin lipids. A convenient synthesis has therefore been developed especially for ethyloctadecanoic acids. The successful syntheses of 6‐ and 9‐ethyloctadecanoic acids are reported here