A general and efficient route for chemical aminoacylation of transfer RNAs
作者:Stephanie A. Robertson、Jonathan A. Ellman、Peter G. Schultz
DOI:10.1021/ja00007a055
日期:1991.3
The preparation of aminoacyl pdCpA in one step and in high yield by reaction of the cyanomethyl active esters of N-protected α-amino acids with pdCpA is detailed. The preparation and photodeprotection of aminoacyl pdCpA derivatives containing nitroveratryl (NVOC) N-protected amino acids is also studied. The utility of the above methods for preparing aminoacyl tRNA was confirmed by enzymatically ligating
phenolic ester mediated peptidesynthesis is an efficient and well established method, the same via totally unsubstituted phenyl ester is not preferred due to the extremely slow rate of aminolysis. We have investigated the scope of the unsubstituted phenyl ester as an intermediate in peptide bond formation and found that it may be useful for the design of chemoselectivepeptideligation when HOBt is used
Process for the preparation of a carboxylic acid ester
申请人:Sankyo Company Limited
公开号:US03937718A1
公开(公告)日:1976-02-10
An improved and novel process for the preparation of a carboxylic acid ester which comprises reacting a carboxylic acid with an alcohol or a sulfenic acid ester thereof in the presence of a tertiary phosphine and a disulfide of a mercaptoheterocyclic compound containing a nitrogen-carbon double bond with which the disulfide linkage is conjugated.
Activation of a carboxy group by dialkyl pyrocarbonates. Synthesis of symmetrical anhydrides and aryl esters of N-protected amino acids using di-tert-butyl pyrocarbonate as condensing reagent