A highly enantioselective (up to 97.5% ee) and diastereoselective (95:5 dr trans/cis) Cu(I)-catalyzed cyclopropanation of alkenes using phenyliodonium ylide generated in situ from iodosobenzene and methyl nitroacetate is reported. The cyclopropanation took place with high enantioselectivity for a wide range of alkenes, and the reaction was performed at room temperature. 1-Nitrocyclopropyl esters are
据报道,使用由
碘代苯和
硝基乙酸甲酯原位生成的苯基
碘鎓叶立德,对烯烃进行了高度对映选择性(高达 97.5% ee)和非对映选择性(95:5 dr 反式/顺式)Cu(I)催化的烯烃
环丙烷化反应。
环丙烷化反应对多种烯烃具有高对映选择性,反应在室温下进行。1-硝基环丙基酯是通用的结构单元,可分别通过两步和三步从市售产品中获得相应的
环丙烷氨基酯和
氨基
环丙烷。