Potassium Hydroxide → (R)-Methyl 5-((5-((4-methylpiperazin-1-yl)methyl)-2-nitrophenyl)amino)-3-(1-(2-(trifluoromethyl)phenyl)ethoxy)thiophene-2-carboxylate

Participants

Reaction Steps

A solution of 1-[(3-fluoro-4-nitrophenyl)methyl]-4-methylpiperazine (0.733 g, 2.90 mmol) in acetonitrile (5 mL) was added dropwise to a mixture of methyl 5-amino-3-({(1R)-1-[2-(trifluoromethyl)phenyl]ethyl}oxy)-2-thiophenecarboxylate (1.00 g, 2.90 mmol) and KOH (0.325 g, 5.79 mmol) in acetonitrile (10 mL) at 0° C. The reaction mixture was allowed to warm to room temperature overnight and then heated to 40° C. for 1 h until analysis by HPLC showed complete consumption of starting materials. The reaction mixture was partitioned between EtOAc (50 mL) and H2O (50 mL). The organic layer was washed with saturated aqueous NaHCO3 (10 mL), concentrated under reduced pressure and then purified by flash column chromatography (DCM:MeOH 98:2 to 85:15, then EtOAC:MeOH 99:1 to 85:15) to give the title compound (0.85 g, 50%) as a red amorphous solid.

Provenance & Evidence