反应详情

A solution of trans-(4-aminomethyl-cyclohexylmethyl)-carbamic acid tert-butyl ester (17 g) and ethyldiisopropylamine (14.41 ml) in N,N-dimethylformamide (350 ml) is cooled to 0° C. and treated with a solution of naphthalene-1-sulfonylchloride (15.9 g) in N,N-dimethylformamide (100 ml). The reaction is stirred at ambient temperature for 2 h, concentrated in vacuo. The residue is taken up in dichloromethane, washed with a 0.5 N HCl solution, a saturated aqueous sodium carbonate solution and water, dried and concentrated. Crystallization from hexanes-ethyl acetate gives trans-{4-[(naphthalene-1-sulfonylamino)-methyl]-cyclohexylmethyl}-carbamic acid tert-butyl ester as a white powder, melting at 199-200° C. Rf (A1) 0.42.

1. concentrationconcentrated in vacuo
2. washwashed with a 0.5 N HCl solution
3. dry with materiala saturated aqueous sodium carbonate solution and water, dried
4. concentrationconcentrated
5. customCrystallization from hexanes-ethyl acetate