反应详情

500 mL trifluor acetic acid was added to 70 g N′-(4-bromo-3-methyl-benzoyl)-hydrazinecarboxylic acid tert-butyl ester in 1 L dichlormethane. The reaction was stirred 1 h at RT and evaporated. The residue was basicfied with 1N sodiumhydroxide and extracted with saturated sodiumchloride solution and tetrahyrofuran. The organic layer was evaporated and the residue crystallized with ethyl acetate to give 25 g desired product.

1. customevaporated
2. extractionextracted with saturated sodiumchloride solution and tetrahyrofuran
3. customThe organic layer was evaporated
4. customthe residue crystallized with ethyl acetate