Toluene → 3-(1-Phenylsulfonyl-4-[2-(3-fluoro-phenyl)-vinyl]-1h-pyrazol-3-yl)-pyridine

Participants

Reaction Conditions

Reaction Steps

To toluene (20 ml) containing 36A (0.48 g, 1.32 mmol) (see Scheme 7), was added 1.5 eq of (E)-2-(3-fluorphenyl)-vinyl boronic acid (0.33 g). The resulting mixture was stirred for 2 hours under N2. Successively were added 2 eq of K3PO4 (0.56 g), 4 mol % of Pd(OAc)2 (8.8 mg) and 8 mol % of S-Phos (32 mg). After the addition, the resulting solution was warmed at 90° C. for 18 hours under N2. After cooling to room temperature, the mixture was diluted with ethyl acetate, washed three times with a saturated NaHCO3 solution, dried (Na2SO4), filtered and concentrated. The resulting residue was purified by flash chromatography (diethyl ether/PE 1/1) to afford 3-(1-phenylsulfonyl-4-[2-(3-fluoro-phenyl)-vinyl]-1H-pyrazol-3-yl)-pyridine (46B) as an oil (0.39 g, 73%). 1H-NMR (400 MHz, CDCl3): δ 8.85 (d, J=2 Hz, 1H), 8.65 (dd, J=5 Hz, 2 Hz, 1H), 8.36 (s, 1H), 8.13-8.08 (m, 2H), 7.95 (dt, J=8 Hz, 2 Hz, 1H), 7.72-7.67 (m, 1H), 7.58 (bt, J=8 Hz, 2H), 7.41-7.37 (m, 1H), 7.33-7.27 (m, 1H), 7.16 (bd, J=7 Hz, 1H), 7.12-7.07 (m, 1H), 7.0-6.94 (m, 1H), 6.92 (d, J=16 Hz, 1H), 6.82 (d, J=16 Hz, 1H).

Provenance & Evidence