Stereocontrol in radical cyclizations on sugar templates
作者:Catherine Lesueur、Robert Nouguier、Michéle Paula Bertrand、Pascale Hoffmann、Alain De Mesmaeker
DOI:10.1016/s0040-4020(01)80694-3
日期:1994.5
The radical cyclization of alkyl hex-2-enopyranosides provides a stereocontrolled route to fused furanopyranes. The intermediate radical is generated either via the reduction of the appropriate halide by tin hydride or via sulfonyl radical addition to allyl hex-2-enopyranosides. The two methodologies are compared with respect to diastereoselectivity. Stereocontrol is discussed on the basis of conformational preference in the transition state.