New methods in peptide synthesis. Part V. On α- and γ-diphenylmethyl and phenacyl esters of<scp>L</scp>-glutamic acid
作者:J. Taylor-Papadimitriou、C. Yovanidis、A. Paganou、L. Zervas
DOI:10.1039/j39670001830
日期:——
diphenylmethyl and phenacyl esters of monocarboxylic acids (L-proline, S-trityl-L-cysteine, L-glutamine, and L-asparagine) as well as α- and γ-esters of L-glutamic acid are described. The structures of the α-and γ-esters have been established by conversion of the α-esters into derivatives of L-glutamine. All these esters should prove to be useful in peptide synthesis, since the carboxy protecting groups can be
的一元羧酸几个二苯并苯甲酰甲基酯(大号-脯氨酸,小号三苯甲基大号-半胱氨酸,大号谷氨酰胺,和大号天冬酰胺),以及α-和γ的-酯大号谷氨酸进行说明。α-和γ-酯的结构是通过将α-酯转化为L的衍生物而建立的-谷氨酰胺。所有这些酯应被证明可用于肽合成,因为可以选择性地除去羧基保护基。二苯基甲基在某些非极性溶剂中受氯化氢作用,而苯甲酰基在苯硫化钠的作用下受力。此外,两个保护基团都可以通过氢解除去。提出了对苯甲酸酯进行意外氢解的解释。