Piperidine → Ethyl 5-[5-(4-chloro-phenyl)-pyridin-2-ylethynyl]-3-methyl-1-(2-pyrrolidin-1-yl-ethyl)-1h-indole-2-carboxylate

Participants

Reaction Steps

Under an argon atmosphere 11 mg (0.02 mmol) Pd(PPh3)2Cl2 and 3 mg (0.02 mmol) CuI are added to a solution of 250 mg (0.77 mmol) ethyl 5-ethynyl-3-methyl-1-(2-pyrrolidin-1-yl-ethyl)-1H-indole-2-carboxylate and 243 mg (0.77 mmol) 5-(4-chloro-phenyl)-2-iodo-pyridine in 1.52 mL (15.4 mmol) piperidine and 25 mL THF and the reaction mixture is stirred for 4 h at RT. It is diluted with water, extracted exhaustively with EtOAc, the combined organic phases are washed with water and saturated NaCl solution and dried over Na2SO4. After the desiccant and solvent have been eliminated the residue is purified first by chromatography (silica gel, cyc/EtOAc 2:1) and then by HPLC.

Provenance & Evidence