On the basis of the results obtained from NMR spectroscopy, X-ray analysis and chemical transformations, it was established that acidic hydrolysis of (2S,4S)-4-arylaminoglutamates results in the formation of lactams in which ring closure occurs with the participation of the γ-amino and α-COOH groups; but isomeric lactams resulting from the participation of the α-amino and γ-COOH groups are not formed
根据核磁共振光谱、X 射线分析和
化学转化的结果,确定 (2S,4S)-4-芳基
氨基谷
氨酸的酸性
水解导致形成内酰胺,其中环闭合发生在γ-
氨基和α-COOH基团;但是没有形成由α-
氨基和γ-COOH基团参与产生的异构内酰胺。异构内酰胺,即 (2S,4S)-4-arylamino-5-oxoprolines,可以很容易地在酸性介质中转化为更稳定的 4-amino-1-aryl-5-oxoprolines。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)