反应详情

Cupric sulfate, 90 g. (0.36 mole), is stirred and heated on the steam-bath with 110 ml. of pyridine and 45 ml. of water until complete solution is obtained. 4-Bromo-4'-methylbenzoin, 55 g. (0.18 mole), is added and the mixture is stirred and heated on the steam-bath for 3 hours. During this period, the yellow crystalline product separates. After cooling and dilution with water, the product is collected, washed with water, 1 N hydrochloric acid, and water, and dried; m.p. 132°-135°C. The analytical sample is obtained as yellow needles, m.p. 136°-137°C, after repeated recrystallizations from 95% ethanol.

1. temperatureheated on the steam-bath with 110 ml
2. addition(0.18 mole), is added
3. stirringthe mixture is stirred
4. temperatureheated on the steam-bath for 3 hours
5. waitDuring this period
6. temperatureAfter cooling
7. customdilution with water, the product is collected
8. washwashed with water, 1 N hydrochloric acid, and water
9. customdried
10. customThe analytical sample is obtained as yellow needles, m.p. 136°-137°C
11. customrecrystallizations from 95% ethanol