1,2-Dichloroethane → N-(5-chloro-2-{2,2-difluoro-1-[(4-methoxyphenyl)amino]ethyl}benzyl)-1-(tert-butoxycarbonyl)-L-prolinamide

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Reaction Steps

EDC (0.171 g, 1.25 mmol) was added to a stirred mixture of N-{1-[2-(aminomethyl)-4-chlorophenyl]-2,2-difluoroethyl}-N-(4-methoxyphenyl)amine (0.314 g, 0.96 mmol), N-BOC-L-proline (0.207 g, 0.96 mmol) and HOAT (0.171, 1.25 mmol) in DMF (2.0 mL). After 18 h the mixture was partitioned between EtOAc and water. The organic layer was washed with 1M citric acid, saturated aqueous NaHCO3 and brine, dried (Na2SO4) and reduced in vacuo and the residue was purified by flash column chromatography on silica (eluting with 5% methylene chloride, 10-50% ethyl acetate/hexanes gradient) to give N-(5-chloro-2-{2,2-difluoro-1-[(4-methoxyphenyl)amino]ethyl}benzyl)-1-(tert-butoxycarbonyl)-L-prolinamide (0.256 g) as a foam; LC-MS m/z=524.3.

Provenance & Evidence