Phosphorus oxychloride → HCID 10338650, compound

Participants

Reaction Steps

Dissolve 7-[2-(6-methylpyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-1H-quinoxalin-2-one (Example 55b; 200 mg, 0.6 mmol) in phosphorus oxychloride (20 mL). Reflux the solution for 30 min. Evaporate in vacuo. Dissolve the residue in 3:1 chloroform/isopropyl alcohol (100 mL) and wash the solution with 5% aqueous ammonia solution, brine and water. Dry the organic phase over sodium sulfate. Filter and evaporate the solvents in vacuo to give the target product as a yellow solid 180 mg (86%). MS (electrospray, m/z) 362.2 (M+1).

Provenance & Evidence