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Glycopyranosides methyl 2-deoxy

Since the course of chromogen formation involves 2-acetamido-2-deoxy-D-glucofuranose or 2-acetamido-2-deoxy-D-galactofuranose as an intermediate, the failure of alkali-stable glycopyranosides to respond to the test is understandable. An alkali-stable 4-O-substituent will likewise prevent fu-ranose formation it has been observed that (a) methylated derivatives of... [Pg.266]

The 1,2-trons-D-glycopyranosides are also obtained by the Koenigs-Knorr reaction. Treatment of 3,4,6-tri-0-acetyl-2-amino-2-deoxy-a-D-galactopyranosyl bromide hydrobromide (30) with methanol in the presence of silver carbonate and Drierite gives the corresponding methyl /8-D-galactopyranoside68 (31). Similarly, methyl 3,4,6-tri-O-... [Pg.254]

TABLE n SYNTHESIS OF METHYL 2-AMINO-2-DEOXY-GLYCOPYRANOSIDES... [Pg.85]

Cl8H26O11f cis-2,3,4,6-Tetra-0-acetyl-l-deoxy-D-glucopyranoside-1,2 -spiro(3 -methyl-3 -hydroxy-tetrahydrofuran), 46B, 443 Cl8H2eOi1, trans-2,3,4,6-Tetra-O-acetyl-1-deoxy-D-glycopyranoside-1,2 -spiro(3 -methyl-3 -hydroxy-tetrahydrofuran), 46B, 443 ClsHaeOio f 3,4,6"Tri-O-acetyl-1,2-0-(R)-(1-t-butoxyethylidene)-a-D-galactopyranose, 46B, 439... [Pg.223]

A 50%-NaH-oil dispersion dissolved with stirring at 70° under Ng in dimethyl sulfoxide, cooled to 20°, a soln. of methyl 2-acetamido-2-deoxy-a-D-gluco-pyranoside in dimethyl sulfoxide added, after 0.5 hr. methyl iodide added drop-wise, and the product isolated after 0.5-1 hr. methyl 2-deoxy-3,4,6-tri-0-methyl-2-(N-methylacetamido)-a-D-glycopyranoside. Y 89%. F. e., also labeled compds. on a microscale, s. A. and P. Stoffyn, and J. C. Orr, Carbohyd. Res. 23, 251 (1972). [Pg.116]


See other pages where Glycopyranosides methyl 2-deoxy is mentioned: [Pg.72]    [Pg.150]    [Pg.99]    [Pg.96]    [Pg.96]    [Pg.81]    [Pg.305]    [Pg.229]    [Pg.491]    [Pg.112]    [Pg.141]    [Pg.182]    [Pg.186]    [Pg.212]    [Pg.218]    [Pg.218]    [Pg.1049]    [Pg.116]    [Pg.208]    [Pg.118]    [Pg.125]    [Pg.115]    [Pg.203]    [Pg.223]    [Pg.134]    [Pg.55]    [Pg.56]    [Pg.57]    [Pg.60]    [Pg.80]    [Pg.103]    [Pg.58]    [Pg.19]    [Pg.145]    [Pg.18]    [Pg.112]    [Pg.296]   


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