反应详情

In 60 ml of methanol was added 5.87 g of 5-[(1-methylindol-3-yl)carbonyl]-4,5,6,7-tetrahydrobenzimidazole obtained in Example 41, and a solution of 7.52 g of (+)-dibenzoyltartaric acid in 240 ml of methanol was added thereto to once form a clear solution. On leaving the solution to stand at room temperature for one night, there were precipitated crystals, which were collected by filtration and recrystallized three times from dimethylformamide/water to obtain 2.30 g of (R)-(-)-5-[(1-methylindol-3-yl)carbonyl]-4,5,6,7-tetrahydrobenzimidazole (+)-dibenzoyltartarate.

1. customto once form a clear solution
2. customOn leaving the solution
3. waitto stand at room temperature for one night
4. customthere were precipitated crystals, which
5. filtrationwere collected by filtration
6. customrecrystallized three times from dimethylformamide/water