Protection des acides par les groupements ABz utilisation en synthese peptidique
摘要:
The novel azidomethoxybenzyl esters (ABz esters) of various acids are easily obtained and are cleanly cleaved in very mild reductive conditions. Such esters serve to protect the carboxyl group in peptide synthesis without any racemisation.
Protection of amines with the 4-azidomethylenoxybenzyloxycarbonyl group
作者:Bernard Loubinoux、Philippe Gerardin
DOI:10.1016/s0040-4039(00)92626-1
日期:1991.1
A new urethanetypeprotectivegroup for amines, the 4-azidomethylenoxybenzyloxycarbonyl (AZ) group is described. This group is cleaved under very mild reductive conditions. It can be cleaved in the presence of the Z and methyl ester groups. Independent removal of AZ and BOC groups, each in the presence of the other, is possible.
A photochromic chromene compound having an indeno(2,1-f)naphtho(1,2-b)pyran structure as its basic skeleton, an aryl group or a heteroaryl group at the 6-position carbon atom of the structure and an electron donor group having a Hammett constant σp of not more than -0.1 at the 7-position carbon atom.