Hydrogen Peroxide → HCID 22048190, compound

Participants

Reaction Conditions

Reaction Steps

To N-methylpyrrolidone (140.56 L) was added 2-{[3-chloro-4-(4-methoxyphenyl)-5,8-dihydro-6H-thiopyrano-[4′,3′:4,5]thieno[2,3-b]pyridin-2-yl]methyl}-1H-isoindole-1,3(2H)-dione (14.056 kg) and the mixture was dissolved by heating at about 40° C. Then, vanadium (IV) oxyacetylacetone (49.09 g) was added thereto and the 30% hydrogen peroxide was added dropwise, while maintaining at 20 to 23° C. The mixture was stirred at the same temperature for 1 hour and then cooled to 3° C., followed by adding dropwise 0.5 N sodium thiosulfate (5 L) and then water (281.14 L). The mixture was stirred for 1 hour under ice-cooling. The crystals deposited was filtered off, dried and dissolved in N-methylpyrrolidone (135.65 L). Active carbon (678 g) was added and the mixture was stirred at room temperature for 30 minutes. The active carbon was filtered off and washed with N-methylpyrrolidone (13.565 L). The filtrate and washings were combined and to the mixture was added dropwise isopropyl ether (298.43 L). The crystals deposited were filtered off, washed with isopropyl ether (67.83 L×2) to obtain the titled compound (9.56 kg, 64.3%). 1H-NMR (CDCl)δ: 2.01–2.19 (1H, m), 2.54–2.73 (2H, m), 3.00–3.07 (1H, m), 3.89 (3H, s), 3.95 (1H, d, J=16.9 Hz), 4.05 (1H, d, J=16.9 Hz), 5.20 (2H, s), 6.99–7.03 (2H, m), 7.16–7.20 (2H, m), 7.76–7.80 (2H, m), 7.91–7.95 (2H, m)

Provenance & Evidence