REACTIONS OF β-d-HEXOPYRANOSIDE INVOLVING α-NITROOLEFIN STRUCTURE WITH SOME S-YLIDES

Abstract
Treatment of methyl 4,6-O-benzylidene-2,3-dideoxy-3-nitro-β-d-erythro-hex-2-enopyranoside (1) with dimethylsulfoxonium methylide and dimethylsulfuranylidene acetophenone afforded the corresponding cyclopropane derivative 3 (75%) and 4 (71%), respectively. In the case of ethyl (dimethylsulfuranylidene) acetate, however, stable ylide (6) which involves two isomers was obtained in 75% yield. Catalytic reduction of 6 gave quantitatively ethoxycarbonylmethyl derivative (7) which has gluco-configuration.