Photoreaction of methyl 4,6-O-benzylidene-2,3-dideoxy-3-nitro-β-d-erythro-hex-2-enopyranoside with 1,3-dioxolane and tetrahydrofuran
作者:Tohru Sakakibara、Toshio Nakagawa
DOI:10.1016/0008-6215(87)80184-2
日期:1987.6
Abstract Irradiation of the title compound in 1,3-dioxolane and in tetrahydrofuran respectively afforded the d - gluco and d - manno isomers having the 1,3-dioxolan-2-yl and tetrahydrofuran-2-yl group at C-2, besides the glycosid-3-ulose and nitro alcohol; in the later case, the dimer was also isolated.
Reactions of methyl 4,6-O-benzylidene-2,3-dideoxy-3-nitro-α- and-β-d-erythro-hex-2-enopyranosides with phenylacetonitrile: Preparation and structural determination of adducts and an isoxazole derivative
作者:Tohru Sakakibara、Rokuro Sudoh
DOI:10.1016/0008-6215(83)84004-x
日期:1983.9
Treatment of methyl 4,6- O -benzylidene-2,3-dideoxy-3-nitro-α- d - erythro -hex-2-enopyranoside with phenylacetonitrile afforded adducts having the d - manno ( 2 and 3 ) and d - gluco configurations ( 4 and 5 ), the isoxazole 6 , the cyano alkene 7 , and the nitro alcohols 9 and 10 . Similar reaction of the β anomer 11 gave adducts having the d - gluco configuration ( 12 and 13 ) and the nitro alcohol
Abstract Several nucleophiles were separately treated with methyl and phenyl 2,3-anhydro-4,6- O -benzylidene-3-deoxy-3-nitro-β- d -allopyranoside, to give 2-substituted aldos-3-ulose derivatives. In the latter case, the subsequent β-elimination of the aglyconic phenyl group always occurred to afford the corresponding glycal. Reaction mechanisms thereof are also discussed.