反应详情

At room temperature, 2-methyl-5-(trifluoromethyl)phenyl chlorocarbonate (239 mg) is added to a solution of 4-{4-[(cyclohexyloxy)carbonyl]-1,3-thiazol-2-yl}piperidinium chloride (VII-1, 324 mg) and diisopropylethylamine (323 mg) in dichloromethane (8 ml). The mixture is stirred at room temperature overnight, and water is then added. The aqueous phase is separated off and extracted with ethyl acetate, and the combined organic phases are then dried with sodium sulphate. The solid is filtered off and the solvent is removed by distillation. The residue is purified chromatographically. This gives 2-methyl-5-(trifluoromethyl)phenyl 4-{4-[(cyclohexyloxy)carbonyl]-1,3-thiazol-2-yl}piperidine-1-carboxylate (193 mg, 39%).

1. customThe aqueous phase is separated off
2. extractionextracted with ethyl acetate
3. dry with materialthe combined organic phases are then dried with sodium sulphate
4. filtrationThe solid is filtered off
5. customthe solvent is removed by distillation
6. customThe residue is purified chromatographically