Bis(4,6-dimethoxy-1,3,5-triazin-2-yl) Ether as Coupling Reagent for Peptide Synthesis
作者:Konrad Jastrzabek、Przemyslaw Bednarek、Beata Kolesinska、Zbigniew J. Kaminski
DOI:10.1002/cbdv.201200369
日期:2013.5
4‐diazabicyclo[2.2.2]octane (DABCO) to yield, under mild reaction conditions, superactive triazine esters. Versatility of this new coupling reagent was confirmed by condensation of lipophilic and sterically hindered carboxylic acids with amines in 71–98% yield, and by synthesis of peptides, including those containing Aib‐Aib sequence, in solution with high yield and high enantiomeric purity.
双(4,6-二甲氧基-1,3,5-三嗪-2-基)醚 (4) 通过用 2-氯处理 2-羟基-4,6-二甲氧基-1,3,5-三嗪制备‐4,6-二甲氧基-1,3,5-三嗪,产率 61%。发现与焦碳酸酯等电子的醚 4 能够在 1,4-二氮杂双环 [2.2.2] 辛烷 (DABCO) 存在下活化羧酸,在温和的反应条件下产生超活性的三嗪酯。这种新型偶联剂的多功能性通过亲脂性和空间位阻羧酸与胺的缩合以 71-98% 的产率得到证实,并通过在溶液中以高产率和高对映体纯度合成肽,包括含有 Aib-Aib 序列的肽。