反应详情

Ethyl α-bromophenylacetate (0.139 g), Na2CO3 (0.200 g) and tetrabutylammonium bromide (0.034 g) were added to a solution of 1,1-dioxo-3-butyl-3-ethyl-5-phenyl-7-bromo-8-hydroxy-2,3,4,5-tetrahydro-1,5-benzothiazepine (WO 96/16051; 0.200 g, 0.442 mmol) in MeCN (6 ml). The suspension was heated under reflux overnight before the solvent was removed under reduced pressure. The crude product was extracted (DCM/H2O) and purified by flash chromatography (Hex:EtOAc-5:1) to give the title compound 0.256 g (94%) as a white solid. NMR 0.65–0.85 (m, 6H), 0.95–1.65 (m, 8H), 3.00–3.15 (m, 2H), 3.50–3.80 (m, 2H), 3.70–3.80 (2s, 3H), 5.60 (s, 1H), 5.65 (d, 1H) 7.00–7.60 (m, 17H), 8.05–8.20 (2d, 1H).

1. temperatureThe suspension was heated
2. temperatureunder reflux overnight before the solvent
3. customwas removed under reduced pressure
4. extractionThe crude product was extracted (DCM/H2O)
5. custompurified by flash chromatography (Hex:EtOAc-5:1)