反应详情

A solution of 2-(2-aminophenyl)ethanol a2-0 (450 g, 3.28 mol, 1 eq) and triethylamine (332 g, 3.28 mol, 1 eq) in dichloromethane (2 l) is cooled at −5° C. and bromovalerylchloride (654 g, 3.28 mol, 1 eq) in dichloromethane (2 l) is added dropwise without exceeding 0° C. The organic phase is washed with HCl 1N (4×2 l) and brine (1×2 l). The aqueous layer is extracted with dichloromethane (1×2 l). The combined organic layers are dried over MgSO4, filtered and evaporated under vacuum to afford 1008 g of 5-bromo-N-[2-(2-hydroxyethyl)phenyl]pentanamide a2-1.

1. customwithout exceeding 0° C
2. washThe organic phase is washed with HCl 1N (4×2 l) and brine (1×2 l)
3. extractionThe aqueous layer is extracted with dichloromethane (1×2 l)
4. dry with materialThe combined organic layers are dried over MgSO4
5. filtrationfiltered
6. customevaporated under vacuum