反应详情

A solution of 3,6-dichloro-4H-thieno[3,2-e]-1,2,4-thiadiazine 1,1-dioxide (0.5 g, 1.95 mmol) and (1-aminocyclopentyl)-methanol (0.45 g, 3.9 mmol) in ethanol (4 ml) was stirred for 21 h at 120° C. in a sealed flask. The cooled solution was concentrated in vacuo and the residue dissolved in 1N sodium hydroxide (40 ml) followed by treatment with decolourising charcoal. After filtration, the clear solution was acidified to pH <2 with 4M hydrochloric acid and the precipitate was filtered off and recrystallised from ethanol and finally purified by chromatography (dichloromethane/methanol (19:1)) to give 70 mg (10%) of the pure title compound; mp 213-214° C.; 1H-NMR (DMSO-d6): δ1.45-2.0 (m, 8H), 3.53 (s, 2H), 5.05 (br s, 1H), 6.82 (br s, 1H) 7.11 (s, 1H), 10.8 (br s, 1H); MS: m/e 335/337 (M+), 317/319 (M—H2O)+.

1. concentrationThe cooled solution was concentrated in vacuo
2. dissolutionthe residue dissolved in 1N sodium hydroxide (40 ml)
3. filtrationAfter filtration
4. filtrationthe precipitate was filtered off
5. customrecrystallised from ethanol
6. customfinally purified by chromatography (dichloromethane/methanol (19:1))