A concise C-glycosyl amino acid synthesis by alkenyl C-glycoside–vinyloxazolidine cross-metathesis. Synthesis of glycosyl serine, asparagine and hydroxynorvaline isosteres
作者:Alessandro Dondoni、Pier Paolo Giovannini、Alberto Marra
DOI:10.1039/b106029p
日期:——
A convergent synthesis has been developed to afford C-linked glycosyl aminoacids by cross-metathesis of vinyl, allyl, and butenyl C-glycosides with N-Boc-vinyloxazolidine using the Grubbs 1,3-dimesityl-4,5-dihydroimidazol-2-ylideneruthenium carbene. The method has been employed to introduce through an α-linkage, an α-aminopentanoic acid chain at the anomeric carbon of β-D-C-gentiobiose to give a totally