Triethylamine → Methyl 4-(1-methanesulfonylamino-1-methylethyl)benzoate

Reaction equation

[NH2:1][C:2]([C:5]1[CH:14]=[CH:13][C:8]([C:9]([O:11][CH3:12])=[O:10])=[CH:7][CH:6]=1)([CH3:4])[CH3:3].C(N(CC)CC)C.[CH3:22][S:23](Cl)(=[O:25])=[O:24]>ClCCl>[CH3:22][S:23]([NH:1][C:2]([C:5]1[CH:14]=[CH:13][C:8]([C:9]([O:11][CH3:12])=[O:10])=[CH:7][CH:6]=1)([CH3:3])[CH3:4])(=[O:25])=[O:24]

Participants

Procedure

Methyl 4-(1-amino-1-methylethyl)benzoate (200 mg) and triethylamine (0.30 mL) were dissolved in dichloromethane (10 mL), methanesulfonyl chloride (88 μL) was added under ice-cooling, and the mixture was stirred at the same temperature for 30 min and at room temperature for 2 hr. After completion of the reaction, the solvent was evaporated, 0.5N hydrochloric acid was added to the residue, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and the solvent was evaporated. The obtained residue was purified by column chromatography (hexane:ethyl acetate) to give the title compound (252 mg).