反应详情

1-Nicotinoyl-3-phenyl-2-pyrazoline (0.1 g) synthesized in Example 3 was dissolved in ethanol (5 ml). Thereto was added a 1 N methanesulfonic acid ethanol solution (0.6 ml) with ice-cooling. The resulting crystals were collected by filtration, washed with ether and dried to obtain 0.1 g of a title compound as white crystals.

1. temperaturecooling
2. filtrationThe resulting crystals were collected by filtration
3. washwashed with ether
4. customdried