Phenyl- and vinyllithiums having an alkyl substituent at their ortho- and cis-position, respectively, readily added to alkynes in the presence of 5 mol% of Fe(acac)(3). The reaction of o-(trimethylsilyl)phenyllithium with alkynes gave benzosiloles through an addition-cyclization sequence.
在5摩尔%Fe(acac)(3)的存在下,分别在邻位和顺位分别具有烷基取代基的
苯基锂和
乙烯基锂很容易添加到
炔烃中。邻-(三甲基甲
硅烷基)
苯基锂与
炔烃的反应通过加成环化序列得到苯并甲
硅烷基。