A parallel synthesis approach towards a family of C-nucleosides
摘要:
A synthetic route was devised for a sugar based alpha-chloroketone, which was subsequently used to generate a family of C-nucleosides via parallel synthetic methodology. (C) 2003 Elsevier Ltd. All rights reserved.
selective cleavage of acetal-derived alkylsilyl peroxides, followed by the formation of a carbon-carbon bond is reported. The reaction proceeds under mild reaction conditions and exhibits a broad substrate scope with respect to the acetal moiety and the carbon electrophile. Mechanistic studies suggest that the present reaction proceeds through a free-radical process involving carbon radicals generated
Baker'syeastmediated reduction of the α-acetoxy ketones (1)–(3) proceeds with high enantio- and stereoselectivity to give the carbinols (4)–(6), easily converted into the masked chiral deoxy sugars (12)–(14), from which =D}- and =L}-deoxysugars have been obtained.