The reaction of 3-(trimethylsilyl)-2-propynylidenetriphenylarsorane, generated in situ from the corresponding arsonium salt and butyllithium, with chalcones (as α,β-unsaturated ketones) gives (trimethylsilylethynyl)cyclopropanes in 96-100% yield and with high stereoselectivity.
3-(三甲基
硅基)-2-
丙炔亚烯(三苯基
砷烷)与
查尔酮(作为α,β-不饱和酮)的反应,采用原位生成的相应
砷盐和丁基
锂,能够以96-100%的产率和高立体选择性生成(三甲基
硅基炔基)
环丙烷。