Phosphorus oxychloride → HCID 21880588, compound

Participants

Reaction Steps

A stirred suspension of 6-benzyl-2-(2-chlorophenyl)-3-(4-chlorophenyl)-2H-pyrazolo[3,4-c]pyridin-7(6H)-one (1A-3, 925 mg, 2.07 mmol) in POCl3 (20 ml) was heated at reflux for 5 days. After the reaction was cooled and concentrated, in vacuo, an ethyl acetate solution of the residue was washed with saturated aqueous NaHCO3 and then brine. The solution was dried (Na2SO4), concentrated, in vacuo, and then purified on a Biotage™ Flash 40S column using 0–40% ethyl acetate in hexanes to afford I-9A-1a as an off-white solid (600 mg, 77%): +ESI MS (M+1) 374.3; 1H NMR (400 MHz, CD2Cl2) δ 8.00 (d, J=6.2 Hz, 1H), 7.60–7.45 (m, 5H) 7.38 (d, J=8.7 Hz, 2H), 7.27 (d, J=8.7 Hz, 2H).

Provenance & Evidence