Glucosamine-containing 1,3,4-thiadiazole derivative, and preparation method and application thereof
A technology of thiadiazole derivatives and glucose, which is applied in the field of drug preparation, can solve problems such as narrow therapeutic range, poor drug selectivity, and large gastrointestinal irritating side effects
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Embodiment 1
[0026] Embodiment 1, a kind of 1,3,4-thiadiazole derivatives containing glucosamine, its molecular formula is as follows:
[0027]
[0028] Wherein, the R is selected from C 9 h 19 -,C 6 h 5 -,2-CH 3 C 6 h 4 -,3-CH 3 C 6 h 4 -,4-CH 3 C 6 h 4 -,4-CH 3 OC 6 h 4 -,2-CH 3 OC 6 h 4 -,3-NO 2 C 6 h 4 -,4-NO 2 C 6 h 4 -,2-OHC 6 h 4 -,3-OHC 6 h 4 -,4-OHC 6 h 4 -,3-BrC 6 h 4 -,4-BrC 6 h 4 -,3-ClC 6 h 4 -,4-ClC 6 h 4 -,3-FC 6 h 4 -,4-FC 6 h 4 -,2,3-Cl 2 C 6 h 3 -,2,4-Cl 2 C 6 h 3 -,C 10 h 7 -.
Embodiment 2
[0029] Embodiment 2, a kind of synthetic method containing glucosamine 1,3,4-thiadiazole derivative as described in embodiment 1, its steps are as follows:
[0030] (1) Preparation of 2-deoxy-2-isothiocyanate-1,3,4,6-tetra-O-benzyl-β-D-glucopyranose: 2-deoxy-2-amino-1 ,3,4,6-Tetra-O-benzyl- β -D-pyranose hydrochloride, carbon disulfide and triethylamine are reacted, and then reacted with p-toluenesulfonyl chloride to obtain 2-deoxy-2-isothiocyanate-1,3,4,6-tetra-O- Benzyl- β -D-glucopyranose; reaction with acetonitrile as solvent, 2-deoxy-2-amino-1,3,4,6-tetra-O-benzyl- β - The molar ratio of D-pyranose hydrochloride to carbon disulfide, triethylamine and p-toluenesulfonyl chloride is 1:1:3:1, the reaction temperature is 0°C, and the reaction time is 1 hour.
[0031] (2) N-(1,3,4,6-tetra-O-benzyl-2-deoxy- β -D-glucopyranose-2-yl)-N'-thiosemicarbazide preparation: 2-deoxy-2-isothiocyanate-1,3,4,6-tetra-O-benzyl-β- The reaction of D-glucopyranose with hydrazine hydrate give...
Embodiment 3
[0033] Embodiment 3, a kind of synthetic method containing glucosamine 1,3,4-thiadiazole derivative as described in embodiment 1, its steps are as follows:
[0034] (1) Preparation of 2-deoxy-2-isothiocyanate-1,3,4,6-tetra-O-benzyl-β-D-glucopyranose: 2-deoxy-2-amino-1 ,3,4,6-Tetra-O-benzyl- β -D-pyranose hydrochloride, carbon disulfide and triethylamine are reacted, and then reacted with p-toluenesulfonyl chloride to obtain 2-deoxy-2-isothiocyanate-1,3,4,6-tetra-O- Benzyl- β -D-glucopyranose; reaction with acetonitrile as solvent, 2-deoxy-2-amino-1,3,4,6-tetra-O-benzyl- β - The molar ratio of D-pyranose hydrochloride to carbon disulfide, triethylamine and p-toluenesulfonyl chloride is 1:1.2:3.5:1.2, the reaction temperature is 0°C, and the reaction time is 2 hours.
[0035] (2) N-(1,3,4,6-tetra-O-benzyl-2-deoxy- β -D-glucopyranose-2-yl)-N'-thiosemicarbazide preparation: 2-deoxy-2-isothiocyanate-1,3,4,6-tetra-O-benzyl-β- The reaction of D-glucopyranose with hydrazine hydra...
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