Piperidine → Ethyl 2-(1-piperidinyl)-4-trifluoromethyloxazole-5-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl 2-bromo-4-trifluoromethyloxazole-5-carboxylate (A-2) (0.85 mL) in α,α,α-trifluorotoluene (10 mL) at RT was added piperidine (1.1 mL). The reaction mixture was heated at 120° C. for 20 min by microwave then cooled to RT and diluted with EtOAc (100 mL). The organic solution was washed with H2O (2×100 mL), saturated NH4Cl (1×100 mL), brine (1×100 mL), dried over Na2SO4, filtered, and concentrated to give ethyl 2-(1-piperidinyl)-4-trifluoromethyloxazole-5-carboxylate (A-3) as a yellow solid (1.28 g, 88% yield). LCMS (ESI) calcd for [M+1]+ 293.1. found 293.2.

Provenance & Evidence