反应详情

23.0 g of sodium hydride (as a 60% w/w dispersion in mineral oil) were added to a solution of 80.0 g of 3-methyl-4-nitrophenol in 700 ml of dimethylformamide cooled in an ice-water bath. The resulting mixture was stirred at the same temperature for 20 minutes, at the end of which time a solution of 95.9 g of 2-chloromethylbenzothiazole in 50 ml of dimethylformamide was added to the reaction mixture. The temperature of the resulting mixture was elevated to 80° C. and the mixture was then stirred for 2 hours. At the end of this time, the reaction mixture was poured into ice-water and the precipitated crystalline solid was washed with water. The crude crystalline solid thus obtained was recrystallised from toluene to give 98.8 g (yield 63%) of the title compound as a solid having a melting point of 145° to 147° C.

1. temperaturecooled in an ice-water bath
2. additionwas added to the reaction mixture
3. customwas elevated to 80° C.
4. washthe precipitated crystalline solid was washed with water
5. customThe crude crystalline solid thus obtained
6. customwas recrystallised from toluene