2-(Tributylstannyl)pyridine → 2-[2-(6-Fluoro-pyridin-2-yl)-imidazol-1-ylmethyl]-5-methoxy-3-pyridin-2-yl-pyrazine

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-chloro-2-[2-(6-fluoro-pyridin-2-yl)-imidazol-1-ylmethyl]-5-methoxy-pyrazine (80 mg, 0.25 mmol), 2-tributylstannylpyridine (138 mg, 0.37 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in toluene (10 mL) is heated at 110° C. in a sealed tube for 16 hours. On cooling, the mixture is diluted with DCM (20 mL) and filtered. After the solvent is removed, the residue is purified by PTLC (silica gel; 5% MeOH in DCM) to give 78 mg of 2-[2-(6-fluoro-pyridin-2-yl)-imidazol-1-ylmethyl]-5-methoxy-3-pyridin-2-yl-pyrazine. 1H NMR (CDCl3) 8.59 (d, 1H), 8.15 (d, 1H), 8.08 (s, 1H), 8.02 (d, 1H), 7.85(t, 1H), 7.72 (dd, 1H), 7.32 (dd, 1H), 7.10 (s, 1H), 7.15 (s, 1H), 6.65 (dd, 1H), 6.31 (s, 2H), 4.01 (s, 3H). G. 2-[1-(3-Chloro-5-methoxy-pyrazin-2-ylmethyl)-1H-imidazol-2-yl]-pyrimidine (Compound 8) 1. Synthesis of 2-(1H-imidazol-2-yl)-pyrimidine hydrochloride

Provenance & Evidence