Issue 14, 1970

Studies on the synthesis of methyl 2,3-anhydro-4,6-O-benzylidene-β-D-allopyranoside and -mannopyranoside, and their reaction with sodium azide

Abstract

Monosulphonation of methyl 4,6-O-benzylidene-β-D-glucopyranoside with methanesulphonyl or toluene-p-sulphonyl chloride gave mixtures of 2-, 3-, and 2,3-esters. This behaviour is in contrast with that of the α-anomer, which gives only the 2-ester. A competitive experiment with the α- and β-anomers showed that the most reactive hydroxy-group was that at C-2 in the α-anomer.

Treatment of the β-monosulphonates with alkali gave the appropriate 2,3-anhydro-sugars. Opening of the epoxide rings gave predominantly diaxial products, that is the azido-altroside derivatives.

The n.m.r. spectra of the products are discussed in detail.

Article information

Article type
Paper

J. Chem. Soc. C, 1970, 1961-1966

Studies on the synthesis of methyl 2,3-anhydro-4,6-O-benzylidene-β-D-allopyranoside and -mannopyranoside, and their reaction with sodium azide

R. D. Guthrie, A. M. Prior and S. E. Creasey, J. Chem. Soc. C, 1970, 1961 DOI: 10.1039/J39700001961

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