Lorazepam methanol → Lorazepam

참여 물질

반응 조건

반응 단계

Lorazepam methanol solvate (100 g) was suspended in ethyl acetate (400 ml). The suspension was heated to 60° C. for one hour with rapid stirring and then cooled to 15° C. The suspension was filtered to recover the lorazepam crystals. The crystals were washed with ethyl acetate (50 ml) and dried at 50° C. under 65 mm Hg vacuum for two hours to give crystalline lorazepam (85 g, 80%).

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