New methods in peptide synthesis. Part III. Protection of carboxyl group
作者:G. C. Stelakatos、A. Paganou、L. Zervas
DOI:10.1039/j39660001191
日期:——
For the protection of the carboxyl group of amino-acids during peptide synthesis, the acid-labile diphenylmethyl ester group was used. N-Trityl-(i.e., triphenylmethyl), N-formyl-, or N-o-nitrophenylsulphenyl-amino-acid diphenylmethyl esters were converted by known methods into the corresponding ester hydrochlorides. The deblocking of the carboxyl group was accomplished either by the action of dilute