N‐Methylated Peptide Synthesis via Generation of an Acyl N‐Methylimidazolium Cation Accelerated by a Brønsted Acid
作者:Yuma Otake、Yusuke Shibata、Yoshihiro Hayashi、Susumu Kawauchi、Hiroyuki Nakamura、Shinichiro Fuse
DOI:10.1002/anie.202002106
日期:2020.7.27
formation remains a critical aspect of N‐methylated peptide synthesis. In this study, we synthesized a variety of dipeptides in high yields, without severe racemization, from equivalent amounts of amino acids. Highly reactive N‐methylimidazolium cation species were generated in situ to accelerate the amidation. The key to success was the addition of a strong Brønsted acid. The developed amidation enabled
牢固的酰胺键形成的发展仍然是N-甲基化肽合成的关键方面。在这项研究中,我们从等量的氨基酸中高收率合成了各种二肽,而没有严重的消旋作用。高反应性的N-甲基咪唑鎓阳离子原位生成以加速酰胺化反应。成功的关键是加入强力的布朗斯台德酸。与常规酰胺化的结果相比,开发的酰胺化使得能够在较短的时间内以较高的产率合成大体积的肽。另外,可以通过使用微流反应器或常规烧瓶来进行酰胺化。天然存在的大体积N-甲基化肽,蝶酰胺I-IV的首次全合成。根据实验结果和理论计算,