Stereoselective generation and trapping of lithium eneselenolates leading to ketene selenothioacetals and selenothioesters
作者:Toshiaki Murai、Kaori Kakami、Naoshi Itoh、Takahiro Kanda、Shinzi Kato
DOI:10.1016/0040-4020(96)00005-1
日期:1996.2
The reaction of lithium alkyneselenolates generated from terminal acetylenes with thiols gave rise to lithium eneselenolates with high stereoselectivity. The trapping with alkyl halides afforded ketene selenothioacetals, whereas the trapping with allylic bromides yielded γ,δ-unsaturated selenothioesters via seleno-Claisen rearrangement.
由末端乙炔生成的炔属硒酸锂与硫醇的反应产生了具有高立体选择性的烯脑油酸锂。用烷基卤化物捕集得到烯酮硒代乙缩醛,而通过烯丙基溴化物捕集通过硒代-克莱森重排产生γ,δ-不饱和硒代硫酯。