Free radical brominative ring opening of 1,2-O-benzylidene pyranoses: a route to glycosylating agents

Abstract
Bromination of fully protected 1,2-O-benzylidenated pyranoses with bromotrichloromethane and u.v. light or N-bromosuccinimide gives 2-O-benzoyl glycosyl bromides in good yields, which may be converted in situ to glycosides and disaccharides.

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