作者:Fumiko Fujisaki、Marumi Oishi、Kunihiro Sumoto
DOI:10.1248/cpb.55.124
日期:——
The preparation of amide derivatives (4) by N-acylation of unprotected α-amino acids is easily achieved via readily available benzotriazolyl carboxylates (2a—d) or succinimidyl carboxylates (2e—f). These intermediates (2) are prepared from reaction of carboxylic acids (1) with 1-hydroxybenzotriazole (HO-Bt) or N-hydroxysuccinimide (HO-Su) in the presence of equimolar amounts of 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide hydrochloride (WSCI). The overall yields of the target compounds (4) were excellent, and this two-stage procedure could be applicable as an alternative procedure for one-pot reaction.
通过现成的苯并三唑基羧酸盐(2a-d)或琥珀酰亚胺基羧酸盐(2e-f),可以很容易地通过未保护的 α-氨基酸的 N-酰化反应制备出酰胺衍生物(4)。这些中间体(2)是由羧酸(1)与 1-羟基苯并三唑(HO-Bt)或 N-羟基琥珀酰亚胺(HO-Su)在等摩尔量的 1-乙基-3-(3′-二甲基氨基丙基)碳二亚胺盐酸盐(WSCI)存在下反应制备的。目标化合物(4)的总收率非常高,这种两阶段的程序可作为一锅反应的替代程序。