Sodium sulfate decahydrate → (3-benzyloxy-1-phenyl-1H-pyrazol-5-yl)methanol

Participants

Reaction Steps

To a mixture of methyl 3-benzyloxy-1-phenyl-1H-pyrazole-5-carboxylate (14.53 g) and tetrahydrofuran (300 mL) was gradually added lithium aluminum hydride (1.79 g) at 0° C. and the mixture was stirred at room temperature for 1 hr. To the reaction mixture was gradually added sodium sulfate decahydrate (15.20 g) at 0° C., and the mixture was stirred at room temperature for 30 min. The insoluble material was removed by filtration, and the mother liquid was concentrated. The residue was subjected to silica gel column chromatography to give (3-benzyloxy-1-phenyl-1H-pyrazol-5-yl)methanol (11.65 g, yield 88%) as colorless crystals from a fraction eluted with ethyl acetate-hexane (1:2, v/v). The crystals were recrystallized from ethyl acetate-hexane. melting point: 87-88° C.

Provenance & Evidence