Synthesis of nitrocyclopropanedicarboxylic acid derivatives by addition of α-bromonitroalkanes to methylidene malonic, methylidene cyanoacetic or maleic acid derivatives
作者:G. V. Kryshtal、G. M. Zhdankina、A. S. Shashkov、S. G. Zlotin
DOI:10.1007/s11172-011-0348-8
日期:2011.11
A potassium carbonate promoted addition of 2-bromonitroalkanes to methylidenemalonic and methylidenecyanoacetic acid derivatives and N-benzylmaleimide leads to the functionalized nitrocyclopropanes. In the case of less active olefins, it is reasonable to use the phase-transfer catalyst Bu4NPF6 (10 mol.%), whereas in the case of N-benzylmaleimide, to carry out the process in the ionic liquid [bmim]BF4.
以碳酸钾促进2-溴硝基烷与亚甲基丙二酸酯及亚甲基氰基乙酸酯衍生物以及N-苄基马来酰亚胺的加成反应,可制得官能化的硝基环丙烷。对于活性较低的烯烃,使用相转移催化剂Bu4NPF6(10 mol.%)是合理的;而对于N-苄基马来酰亚胺,则应在离子液体[bmim]BF4中进行反应。