Goettsch; Wiese, Journal of the American Pharmaceutical Association (1912), 1958, vol. 47, p. 319,320
作者:Goettsch、Wiese
DOI:——
日期:——
SAVELEV V. L.; AFANASEVA T. G.; ZAGOREVZKIJ V. A., XIMIYA GETEROTSIKL. SOEDIN., 1978, HO 10, 1340-1342
作者:SAVELEV V. L.、 AFANASEVA T. G.、 ZAGOREVZKIJ V. A.
DOI:——
日期:——
WATER-SOLUBLE YNAMIDE COUPLING REAGENT AND PREPARATION METHOD AND USE THEREOF
申请人:Xi'an Easy Peptide Biotechnology Co., Ltd.
公开号:US20220144793A1
公开(公告)日:2022-05-12
The present disclosure discloses a water-soluble ynamide coupling reagent and a method for using the water-soluble ynamide coupling reagent in the synthesis of amide, polypeptide, ester and thioester compound. The ynamide coupling reagent has the structure represented by the following formula (I):
and in the formula (I), R is one selected from the group consisting of methylsulfonyl, benzenesulfonyl, p-toluenesulfonyl, trifluoroacetyl and other electron withdrawing groups.
Water-removable ynamide coupling reagent for racemization-free syntheses of peptides, amides, and esters
作者:Tao Liu、Xue Zhang、Zejun Peng、Junfeng Zhao
DOI:10.1039/d1gc03498g
日期:——
A novel ynamide coupling reagent, the by-product of which can be removed by water, was reported. It promotes the direct coupling between carboxylic acids and amines, alcohols or thiols to provide amides, peptides, esters and thioesters, respectively. No detectable racemization was observed for all the coupling reactions of carboxylic acids containing an α-chiral center. Importantly, a simple acidic
Electrochemical reduction of amides was achieved by using a hydrosilane without any toxic or expensive metals. The key reactive ketyl radical intermediate was generated by cathodic reduction. Continuous reaction with anodically generated silyl radicals or zinc bromide resulted in chemoselective deoxygenation to give the corresponding amines.