反应详情

Intermediate 52 (2.6 g, 15.64 mmol) dissolved in sodium hydroxide solution (1.88 g, 47 mmol in 4 ml water) and refluxed. The reaction mixture was cooled to rt and acidified with con HCl to obtain the solid. Solid that obtained was filtered and dried to obtain the title compound (1.5 g) as an yellow solid. 1H-NMR (δ ppm, DMSO-d6, 400 MHz): 13.5 (bs, 1H), 9.14 (s, 1H), 9.05 (s, 1H), 2.71 (s, 3H).

1. temperaturerefluxed
2. customto obtain the solid
3. customSolid that obtained
4. filtrationwas filtered
5. customdried