Cyclohexanol → tert-Butyl 4-{4-[(cyclohexyloxy)carbonyl]-1,3-thiazol-2-yl}piperidine-1-carboxylate

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Reaction Steps

At room temperature, cyclohexanol (1.21 g), dimethylaminopyridine (113 mg) and 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide (1.87 g) are added to a solution of 2-[1-(tert-butoxycarbonyl)piperidin-4-yl]-1,3-thiazole-4-carboxylic acid (VIII-1, 2.90 g) in dichloromethane (30 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 sulfate. The solid is filtered off and the solvent is removed by distillation. The residue is purified chromatographically. This gives tert-butyl 4-{4-[(cyclohexyloxy)carbonyl]-1,3-thiazol-2-yl}piperidine-1-carboxylate (2.63 g, 72%)

Provenance & Evidence