苯基-beta-D-吡喃半乳糖苷

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To phenyl-2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside (21.2 g) were added methanol (120 ml) and 28% sodium methylate (0.28 ml) and the mixture was refluxed with stirring for 5 hours. After the reaction solution was cooled, acetic acid (0.1 ml) was added and the mixture was stirred for 30 minutes. Concentration of the reaction solution and crystallization with ethanol (180 ml) gave 9.8 g (yield 77%) of phenyl-β-D-galactopyranoside. Melting point: 154.5° C. the mixture was refluxed After the reaction solution was cooled the mixture was stirred for 30 minutes Concentration of the reaction solution and crystallization with ethanol (180 ml)