Abstract

FREITAS, Juliano C. R; FREITAS, João R. de  and  MENEZES, Paulo H. Stereoselective synthesis of 2,3-unsaturated-O-Glycosides promoted by TeBr₄. J. Braz. Chem. Soc. [online]. 2010, vol.21, n.11, pp. 2169-2172. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532010001100020.

The use of a catalytic amount of tellurium(IV) tetrabromide to promote the O-glycosylation of glycals to yield 2,3-unsaturated-O-glycosides is described. The desired compounds were obtained in good yields and high α-selectivity.

Keywords : O-glycosylation; tellurium tetrabromide; 2,3-unsaturated-O-glycosides.