反应详情

To a stirred solution, under nitrogen, of 89.5 g of 2-chlorophenylhydrazine hydrochloride in 600 ml of pyridine, cooled in an ice bath, was added, dropwise, 87.2 g of 2-fluorobenzoyl chloride, such that the reaction temperature did not exceed 15° C. The reaction mixture was stirred at ambient temperature for 16 hours and then poured into water. Crystallization of the resultant oil was induced by scratching. Recrystallization from toluene yielded 65.7 g (60%) of 2-fluorobenzoic acid, 2-(2-chlorophenyl)hydrazide, m.p. 105°-107° C.

1. additionwas added
2. customdid not exceed 15° C
3. customCrystallization of the resultant oil
4. customRecrystallization from toluene