Nitroalkanes as Alkyl Anion Synthons — A New Approach to the Synthesis of 2-SubstitutedN-Ethyl Succinimides and 2-Substituted Succinate Diesters via Nitroalkanes
作者:Roberto Ballini、Giovanna Bosica
DOI:10.1002/jlac.199619961221
日期:1996.12
2-substituted succinate diesters were obtained by two key steps: (i) Michael addition of a nitroalkane to the appropriate enedione derivative under basic conditions (DBU), with the concomitant elimination of nitrous acid, and (ii) selective reduction of the obtained enone with nickel boride, in methanol/THF. In this context the nirtoalkane acts as an alkyl anion synthon. By this method trimethyl tricarboxylates
通过两个关键步骤获得了2-取代的N-乙基琥珀酰亚胺二酯和2-取代的琥珀酸酯二酯:(i)在碱性条件(DBU)下,将硝基烷烃迈克尔加成到适当的二烯衍生物中,同时消除亚硝酸,和( ii)在甲醇/ THF中用硼化镍选择性还原得到的烯酮。在这种情况下,nirtoalkane充当烷基阴离子合成子。通过这种方法,还合成了三羧酸三甲酯。