A novel method for the synthesis of 1,1,2-tri-substituted cyclopropanes is reported which involves the reaction of electron-deficient olefins with dibromomalonic ester, dibromocyanoacetic or dibromobenzene-acetic ester promoted by tri-n-butylstibine. The reaction was carried out under mild conditions to give the cyclopropane derivatives in moderate to good yields. Other R₃M (M= As,Sb,Bi) reagents as promoter for this reaction have been studied and seem to be less effective than tributylstibine.

中文翻译：

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三丁基锡b碱介导的1,1,2-三取代环丙烷的合成

报道了一种合成1,1,2-三取代的环丙烷的新方法，该方法涉及缺电子的烯烃与由三正丁基锡比汀促进的二溴丙二酸酯，二溴氰基乙酸或二溴苯乙酸酯的反应。反应在温和的条件下进行，以中等至良好的产率得到环丙烷衍生物。已经研究了用于该反应的其他R ₃ M（M = As，Sb，Bi）试剂作为促进剂，并且似乎不如三丁基芪比滨有效。