Rapid Procedure for N-Phthaloylation of α-Amino Carboxamides, α-Amino Alcohols, α-Amino Esters and Dipeptide Derivatives
作者:J. Richard Casimir、Gilles Guichard、Dirk Tourwé、Jean-Paul Briand
DOI:10.1055/s-2001-17710
日期:——
A rapid, one-pot synthesis and mild procedure for the N-phthaloylation of α-amino carboxamides is described. In acetonitrile, these derivatives react with mono-methylphthalate in the presence of BOP and i-Pr2NEt to afford the intermediate N α-[(o-methoxycarbonyl)benzoyl]amino carboxamides, which undergo rapid cyclization in the presence of aqueous sodium carbonate to afford the corresponding N α-phthaloylamino carboxamides in excellent yields. The reaction also works efficiently with α-amino esters, α-amino alcohols and dipeptide esters or amides.
本文描述了一种快速、一步合成的温和方法,用于α-氨基羧酰胺的N-邻苯二甲酰化反应。在乙腈中,这些衍生物在BOP和i-Pr2NEt的存在下与单甲基邻苯二甲酸酯反应,生成中间体Nα-[(邻甲氧羰基)苯甲酰基]氨基羧酰胺,这些中间体在碳酸钠水溶液的存在下迅速环化,以优异的产率生成相应的Nα-邻苯二甲酰氨基羧酰胺。该反应对α-氨基酸酯、α-氨基酸醇以及二肽酯或酰胺同样有效。