Triphenylphosphine → 5-[3-Fluoro-2'-(pyrimidin-2-ylsulfanyl)biphenyl-4-yl]pyrazin-2-amine hydrochloride

Participants

Reaction Steps

To a solution of 4′-(5-aminopyrazin-2-yl)-5′-fluorobiphenyl-2-thiol (400 mg, 1.34 mmol) and 2-chloropyrimidine (167 mg, 1.47 mmol) in DMF (8 mL) were added DIPEA (345 mg, 2.68 mmol) and Ph3P (351 mg, 1.34 mmol) and the resultant mixture heated at 80° Celsius for 1 hour under a N2 atmosphere for 15 h. The mixture was cooled to rt, concentrated to dryness and the residue subjected to FCC to give the title compound (350 mg, 68%). MS (ESI): mass calcd. for C20H14FN5S.HCl, 375.10; m/z found, 376.0 [M+H]+. 1H NMR (300 MHz, CD3OD) δ 8.42 (d, J=4.9, 2H), 8.33-8.28 (m, 1H), 8.03 (d, J=1.4, 1H), 7.79-7.69 (m, 2H), 7.60-7.53 (m, 1H), 7.51-7.43 (m, 2H), 7.21 (dd, J=8.0, 1.7, 1H), 7.15 (dd, J=12.3, 1.6, 1H), 7.06 (m, 1H).

Provenance & Evidence