Conjugate addition of nitroalkanes to dimethyl maleate. Regioselective formation of both monoesters of 2-alkylsuccinic acids
作者:Roberto Ballini、Giovanna Bosica、Alessandro Palmieri、Marino Petrini、Claudio Pierantozzi
DOI:10.1016/s0040-4020(03)01175-x
日期:2003.9
Diesters of (E)-2-alkylidenesuccinic acids obtained by conjugate addition of nitroalkanes to dimethyl maleate can be selectively monohydrolyzed at the more reactive carboxyl group to the corresponding half-ester. Alternatively, total hydrolysis to the diacid allows a subsequent selective methyl esterification of the alkanoic carboxyl group to give the other regioisomeric half-ester. 2-Alkylsuccinic
通过将硝基烷烃共轭加成到马来酸二甲酯中而获得的(E)-2-亚烷基琥珀酸的二酯可以在反应性更高的羧基上选择性地单水解成相应的半酯。可选择地,全部水解为二酸允许链烷羧基的随后的选择性甲基酯化,以给出其他区域异构的半酯。可以通过不饱和衍生物的催化加氢最终获得2-烷基琥珀酸单酯。