Efficient Amide Bond Formation through a Rapid and Strong Activation of Carboxylic Acids in a Microflow Reactor
作者:Shinichiro Fuse、Yuto Mifune、Takashi Takahashi
DOI:10.1002/anie.201307987
日期:2014.1.13
The development of highly efficient amide bond forming methods which are devoid of side reactions, including epimerization, is important, and such a method is described herein and is based on the concept of rapid and strong activation of carboxylic acids. Various carboxylic acids are rapidly (0.5 s) converted into highly active species, derived from the inexpensive and less‐toxic solid triphosgene
开发没有副反应(包括差向异构化)的高效酰胺键形成方法很重要,本文描述了这种方法并且基于羧酸的快速和强活化的概念。各种羧酸快速(0.5 秒)转化为高活性物质,源自廉价且毒性较低的固体三光气,然后快速(4.3 秒)与各种胺反应以高产率(74 %-定量)提供所需的肽.) 没有明显的差向异构化 (≤3%)。我们的工艺可以在环境温度下进行,并且只有 CO 2生成二异丙基乙胺的盐酸盐。在肽合成的悠久历史中,大量的活性偶联剂已被废弃,因为生成的高活性亲电子物质通常容易发生副反应,例如差向异构化。这里提出的概念应该重新引起人们对使用这些试剂的兴趣。