Nitrocyclopropane formation has been successfully carried outby reaction of bromonitromethane with electrophilic alkenes bearingtwo electron-withdrawing groups in the α- and β-positions,and in the presence of potassium carbonate as base. The method allowsgood yields and moderate to satisfactory diastereoselectivity withlinear alkenes, while shows the complete formation of the exo-product with N-alkylmaleimides.
通过
溴硝基甲烷与含有α位和β位两个电子吸引基团的亲电烯烃在
碳酸钾存在下反应,成功实现了
氮杂环丙烷的合成。该方法能够获得良好的产率以及适度的至令人满意的非对映选择性,这与线性烯烃的表现一致,而在N-烷基马来
酰亚胺体系中则完全形成了外型产物。