反应详情

A suspension of 1 g of 2-(3-carbamoylphenylamino)-N-(3,4-dimethoxyphenethyl)acetamide hydrochloride in 20 ml of water was vigorously stirred, whereupon the mixture became a viscous liquid at once and subsequently crystals were formed again. After stirring was continued for 30 minutes, the crystals were collected by filtration, washed with water and then air-dried by allowing to stand at room temperature for 10 days to obtain 0.88 g of 2-(3-carbamoylphenylamino)-N-(3,4-dimethoxyphenethyl)acetamide trihydrate as a crystalline powder having a melting point of 51°-56° C.

1. customwere formed again
2. stirringAfter stirring
3. filtrationthe crystals were collected by filtration
4. washwashed with water
5. customair-dried
6. waitto stand at room temperature for 10 days