Synthesis method of voglibose
A technique for voglibose and its synthesis method, which is applied in the direction of organic chemistry methods, chemical instruments and methods, sugar derivatives, etc., can solve the problems of complicated voglibose preparation process and high market price, and achieve low cost , simple operation, and the effect of saving production costs
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[0062] Step 1: Synthesis of Peracetylated Glucose
[0063] After mixing and grinding 19.8g of glucose monohydrate and 15g of sodium acetate, they were transferred to a three-neck flask, and 120mL of acetic anhydride (Ac 2 O), stirred at 120 ° C for 2h. Pour into 300g of ice water, stir vigorously, solids precipitate out, put it in an ice bath and let it stand for 2h. After suction filtration, the filter cake was washed with distilled water and recrystallized with absolute ethanol-cyclohexane to obtain 35.5 g of fully acetylated glucose with a yield of 71.3%.
[0064] In this step, different reaction conditions were tried. Such as: raw material ratio (glucose monohydrate: acetic anhydride = 1:5 or 1:6), reaction temperature (100°C, 140°C), reaction time (1h, 3h, 5h), the product yield obtained is 68 %-73%.
[0065] Step 2: Synthesis of 2,3,4,6-tetra-O-acetyl-β-D-glucophenanthin
[0066] Add 150mL of dichloromethane into the eggplant-shaped bottle, add 20g of peracetylated ...
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