REACTIONS OF GLYCOSAN-ANNELATED OXOLACTAMS

摘要

Starting with 4-imido-mannosan and 2-imido-galactosan derivatives Norrish-Yang cyclization led to saccharide-annelated azepanediones and azocanediones.Following N-protection these lactams could be opened to give higher branched-chain carbohydrate components of the 4-amino-3-dehydro type.In some cases concomitant rearrangement reactions were observed to give alpha,beta-unsaturated hydroxy lactams as well as saccharides linked to substituted furans.