Diisopropylethylamine → 2-Methyl-N-[1-methyl-3-(4-methylphenyl)-2-phenylpropyl]-2-{[5-(trifluoromethyl)pyridin-2-yl]oxy}propanamide

Participants

Reaction Steps

To a solution of 2-methyl-2-{[5-(trifluoromethyl)pyridin-2-yl]oxy}propanoic acid (Reference example 55, 250 mg, 1.04 mmol) and 4-(4-methylphenyl)-3-phenylbutan-2-amine (Reference example 102, 260 mg, 1.04 mmol, mixture of 4 isomers) in CH2Cl2 (5.5 mL) at RT was added diisopropylethylamine (272 μl, 1.56 mmol) followed by PyBOP (649 mg, 1.25 mmol) and the reaction mixture stirred overnight. The reaction was purified by loading the reaction mixture directly onto a silica gel column and eluting from 0-30% EtOAc/hexane to give the title compound as a mixture of 4 isomers. The diastereomers were separated by HPLC on a ZORBAX RxSi column eluting 97% hexane: 3% ethanol at 20 mL/min with retention times of:

Provenance & Evidence