Glucopyranoside methyl 4,6-0-ethylidene-2,3-0-

Although hydrazine hydrate in ethanol is effective in achieving denitration of carbohydrate nitrates,243,244 the reagent showed little selectivity in its reactions244 with the 2,3-dinitrates of methyl 4,6-O-ben-zylidene-a- and methyl 4,6-0-ethylidene-a- and -/3-D-glucopyranoside. 

Methyl 4 6-0-ethylidene-2 3-0-oxido-diethylidene- 8-D-glucopyranoside, 4 Methyl ethyl ketone, 450 Methyl irons,irons-farnesate, 227... 

A reagent which has been employed for the complete scission of acetal rings is bromine in ether. " This reagent was foimd to remove the 2,3-0-oxidodiethylidene ring, in preference to the ethylidene ring, from methyl 4,6-0-ethylidene-2,3-0-(oxidodiethylidene)-a-D-glucopyranoside. ... 

Methyl 2,3-di-0-acetyl-4,6-0-ethylidene-/ -D-glucoside added to benzaldehyde followed by anhydrous Zn-diloride, and shaken 2 days methyl 2,3-di-O-acetyl-4,6-0-benzylidene-j -D-glucopyranoside. Y 80%. D. M. Hall and T. E. Lawler, Carbohyd. Res. 16, 1 (1971). 

Me glycoside, 4,6-O-ethylidene, N- c Methyl 3-acetamido-3-deoxy-4,6-0-ethylidene-a-D-glucopyranoside CnHisNOg 261.274 Cryst. (MeOH). Subl. 320. 

Me, 4,6-O-ethylidene Methyl 2-amino-2-deoxy-4,6-0-ethylidene-3-0-methyl-a-D-glucopyranoside C10H19NO5 233.264 Mp 231° dec. (as hydrochloride). [a]o +97 (H2O). 

Methyl 5-amino-l,3-0-benzylidene-5-deoxy-a-L-sorbopyranoside, A-336 Methyl 3-amino-3-deoxy-p-D-allofuranoside, A-157 Methyl 3-amino-3-deoxy-a-D-allopyranoside, A-157 Methyl 3-amino-3-deoxy-p-D-allopyranoside, A-157 Methyl 3-amino-3-deoxy-D-alluronate, A-160 Methyl 3-amino-3-deoxy-a-D-altropyranoside, A-165 Methyl 2-amino-2-deoxy-a-D-arabinopyranoside, A-178 Methyl 2-amino-2-deoxy-p-D-arabinopyranoside, A-178 Methyl 4-amino-4-deoxy-a-D-arabinopyranoside, A-179 Methyl 4-amino-4-deoxy-a-L-arabinopyranoside, A-179 Methyl 4-amino-4-deoxy-p-L-arabinopyranoside, A-179 Methyl 2-amino-2-deoxy-4,6-0-ethylidene-3-0-inethyl-a-D-glucopyranoside, M-150... 

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