Reaction of Trialkyl(dibromomethyl)silanes or 1,2-Bis(dibromomethyl)benzene with Triorganomanganates. A Facile and Selective Synthesis of Alkenylsilanes and 1,2-Diaryl-1,2-dihydrobenzocyclobutenes
作者:Hirotada Kakiya、Hiroshi Shinokubo、Koichiro Oshima
DOI:10.1246/bcsj.73.2139
日期:2000.9
stereoselectivity in good yields. The reaction of trialkyl(dibromomethyl)silanes with alkylmagnesium halides proceeded in the presence of a catalytic amount of manganese(II) chloride. Treatment of 1,2-bis(dibromomethyl)benzene with triphenylmanganate gave 1,2-diphenyl-1,2-dihydrobenzocyclobutene.
用衍生自氯化锰 (II) 和三摩尔量的格氏试剂或烷基锂的三烷基锰酸盐处理三烷基(二溴甲基)硅烷,以良好的收率提供具有高立体选择性的(E)-1-三烷基甲硅烷基-1-烯烃。三烷基(二溴甲基)硅烷与烷基卤化镁的反应在催化量的氯化锰(II)存在下进行。用三苯基锰酸盐处理 1,2-双(二溴甲基)苯得到 1,2-二苯基-1,2-二氢苯并环丁烯。