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 Birch reduction 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
2-酰基或 2-酰基-5-烷基噻吩的 Birch 还原和随后的烷基卤化物烷基化以良好的产率得到 2-酰基-2-烷基或 2-酰基-2,5-二烷基-2,5-二氢噻吩。此外,通过将所得二氢噻吩衍生物与间氯过苯甲酸氧化而获得的 2,5-二氢噻吩 1,1-二氧化物的热解,以良好的收率获得了 1,3-二烯基酮。