Electrochemical studies on haloamides. Part XII. Electrosynthesis of oxazolidine-2,4-diones
作者:Maria Antonietta Casadei、Stefania Cesa、Achille Inesi
DOI:10.1016/0040-4020(95)00257-9
日期:1995.5
Electrogenerated bases promote the carboxylation of NH-protic carboxamides bearing a leaving group at the position 2 to give oxazolidine-2,4-diones. The process is believed to involve acid-base reaction with the substrate, carboxylation of its conjugate base to the corresponding carbamate and ring-closure following intramolecular SN2 reaction. A variety of oxazolidine-2,4-diones, including clinically
电生成的碱促进在位置2带有离去基团的NH-质子型羧酰胺的羧化反应,生成恶唑烷-2,4-二酮。该过程被认为涉及与基板成相应的氨基甲酸盐和闭环以下的分子内S酸性-碱反应,其共轭碱的羧化Ñ 2反应。已经以高至优异的收率制备了各种恶唑烷-2,4-二酮,包括临床使用的trimethadione®和malidone®,确立了这种新的成环方法的范围和通用性。