Ring-Opening Reactions of Thiophene Derivatives by the Use of the Birch Reduction
作者:Takanobu Kumamoto、Kumiko Hosoya、Satoshi Kanzaki、Kazuhiro Masuko、Mikio Watanabe、Kozo Shirai
DOI:10.1246/bcsj.59.3097
日期:1986.10
It was found that the Birch reduction of 2-(2-thienyl)alkanoic acid and subsequent alkylation with benzyl bromide resulted in the formation of 2-alkyl-3-benzylthio-3-hexenoic acid selectively. Further, the Birch reduction of a 2,3-dialkylthiophene and subsequent alkylation with benzyl bromide gave a tetrasubstituted olefin which was formed by a selective C–S bond fission between the 1 and 5 positions
发现 2-(2-噻吩基) 链烷酸的 Birch 还原和随后用苄基溴的烷基化导致选择性地形成 2-烷基-3-苄硫基-3-己烯酸。此外,2,3-二烷基噻吩的 Birch 还原和随后与苄基溴的烷基化得到四取代的烯烃,该烯烃是通过噻吩核的 1 和 5 位之间的选择性 C-S 键裂变形成的。与这些结果相反,3-噻吩羧酸衍生物的 Birch 还原和随后的苄基化产生了 2-烷基-4-苄硫基-3-丁烯酸,它是由噻吩的 1 和 2 位之间的 C-S 键裂变形成的核。