Synthesis of linear and cyclic opioid-based peptide analogs containing multiple<i>N</i>-methylated amino acid residues
作者:Anna Adamska、Beata Kolesińska、Alicja Kluczyk、Zbigniew J. Kamiński、Anna Janecka
DOI:10.1002/psc.2804
日期:2015.11
containing one to three N‐methylamino acid residues, and six cyclic counterparts of these peptides were prepared by the solid‐phase method. Introduction of two consecutive N‐methylated amino acids, as well as cyclization of such conformationally constrained sequences, turned out to be challenging. The use of a recently reported triazine‐based coupling reagent, 4‐(4,6‐dimethoxy‐1,3,5‐triazin‐2‐yl)‐4‐methylmorpholinium
通过固相方法制备了一系列六个含有一个至三个N-甲基氨基酸残基的新型阿片肽类似物,以及这些肽的六个环状对应物。引入两个连续的N-甲基化氨基酸,以及将这种构象受限的序列环化,具有挑战性。使用最近报道的基于三嗪的偶联剂4-(4,6-二甲氧基-1,3,5-三嗪-2-基)-4-甲基吗啉基甲苯-4-磺酸盐,能够合成和环化所设计的类似物的收率要比标准偶联剂如TBTU或HATU所允许的收率低,副产物的量少。版权所有©2015欧洲多肽协会和John Wiley&Sons,Ltd.