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。