The Effect of Counterion and Tertiary Amine on the Efficiency of<i>N</i>-Triazinylammonium Sulfonates in Solution and Solid-Phase Peptide Synthesis
作者:Beata Kolesinska、Kamil K. Rozniakowski、Justyna Fraczyk、Inga Relich、Anna Maria Papini、Zbigniew J. Kaminski
DOI:10.1002/ejoc.201402862
日期:2015.1
N-triazinylammonium sulfonates, designed according to the concept of “superactive esters”, was obtained by treatment of ammonium sulfonates with 2-chloro-4,6-dimethoxy-1,3,5-triazine. The structure of the tertiary amine as well as sulfonate anion influenced their reactivity and stability in N,N-dimethylformamide (DMF) solution. The reagents were successfully used in solution- and solid-phase synthesis of Z-, Boc-
根据“超活性酯”的概念设计的一系列 N-三嗪基磺酸铵是通过用 2-氯-4,6-二甲氧基-1,3,5-三嗪处理磺酸铵而获得的。叔胺和磺酸根阴离子的结构影响它们在 N,N-二甲基甲酰胺 (DMF) 溶液中的反应性和稳定性。该试剂已成功用于含天然和非天然空间位阻氨基酸的 Z-、Boc- 和 Fmoc 保护肽的溶液和固相合成以及 [2+1] 片段缩合方法,产生最终产品80-100% 的产率和高光学纯度。在 [Aib]2[Aib]4-脑啡肽类似物和 ACP(65-74) 肽片段 VQAAIDYINEG 的手动 SPPS 中,几种磺酸盐产生肽的速度明显快于 TBTU 或 HATU。