反应详情

2-(Trifluoromethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine (0.096 g, 0.5 mmol, intermediate 4) and diethylaminomethyl polystyrene (0.469 g, 1.500 mmol) were slurried in dichloromethane (DCM) (5 ml). 2,4-Dichlorobenzoyl chloride (0.084 ml, 0.600 mmol) was added and the mixture stirred at room temperature for 24 h. The resin was filtered, washed with dichloromethane and the filtrate concentrated in vacuo to afford crude product which was purified by flash chromatography (Biotage SP4, 25+S, eluting with a 0-100% gradient of ethyl acetate/iso-hexane) to afford 7-[(2,4-dichlorophenyl)carbonyl]-2-(trifluoromethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine (0.178 g, 0.489 mmol, 98% yield).

1. filtrationThe resin was filtered
2. washwashed with dichloromethane
3. concentrationthe filtrate concentrated in vacuo
4. customto afford crude product which
5. customwas purified by flash chromatography (Biotage SP4, 25+S
6. washeluting with a 0-100% gradient of ethyl acetate/iso-hexane)