Ligand exchange reaction of sulfoxides in organic synthesis: A novel method for synthesizing acetylenes and allenes from carbonyl compounds through sulfoxides having a trifluoro-methanesulfonyloxy group on the β-carbon
作者:Tsuyoshi Satoh、Norifumi Itoh、Shizue Watanabe、Hirofumi Koike、Haruko Matsuno、Kenji Matsuda、Koji Yamakawa
DOI:10.1016/0040-4020(95)00520-i
日期:1995.8
A novel method for synthesizing acetylenes and allenes from carbonyl compounds is described. Ligand exchange reaction of alkenylsulfoxides having a trifluoromethanesulfonyloxy group on the β-carbon, which were derived from α-alkyl β-ketosulfoxides, with n-BuLi gave disubstituted acetylenes in good yields. In the case of alkenylsulfoxides having both the trifluoromethanesulfonyloxy and aryl groups on
描述了一种由羰基化合物合成
乙炔和
丙二烯的新方法。由α-烷基β-
酮亚砜衍生的在β-
碳上具有三
氟甲磺酰氧基的
烯基
亚砜与n-BuLi的
配体交换反应以良好的收率得到了二取代的
乙炔。在β-
碳上同时具有三
氟甲磺酰氧基和芳基的
烯基
亚砜的情况下,无需用
正丁基锂处理就可得到芳基
乙炔。另一方面,由α,α-二烷基β-
酮亚砜衍生的
烯醇
三氟甲磺酸酯在用
正丁基锂处理时得到三取代的
烯丙基。该程序用于合成
氯乙炔,大环
乙炔和大环
丙烯。