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An Efficient Synthesis of β-C-Glycosides Based on the Conformational Restriction Strategy: Lewis Acid Promoted Silane Reduction of the Anomeric Position with Complete Stereoselectivity
journal contribution
posted on 2004-10-14, 00:00 authored by Masaru Terauchi, Hiroshi Abe, Akira Matsuda, Satoshi ShutoThe reduction of glyconolactols having an anomeric carbon substituent by Et3SiH/TMSOTf proceeded with complete stereoselectivity to produce
the corresponding β-C-glycosides when the substrates were conformationally restricted in the 4C1-chair form by a 3,4-O-cyclic diketal or a
4,6-O-benzylidene protecting group. Thus, the efficient construction of β-C-glycosides was achieved on the basis of the conformation restriction
strategy.
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benzylideneStrategychair formGlycosidecyclic diketalConformationalbasisanomeric carbon substituentEfficient SynthesisComplete StereoselectivitySiHPromoted Silane ReductionconstructionstereoselectivityRestrictionglycosidessubstrateLewisAnomeric Positionglyconolactolconformation restriction strategyEt4 C 1conformationally
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