反应详情

A suspension of 500 mg. of 1,3-dihydro-3-(3,4-methylenedioxyphenyl)imidazo[4,5-b]pyridin-2-one in 15 ml. of acetic anhydride was heated on a steam bath overnight. The solution was evaporated in vacuo leaving a crystalline residue which was recrystallized from 20 ml. of benzene to give 1-acetyl-3-(3,4-methylenedioxyphenyl)-1,3-dihydroimidazo[4,5-b]pyridin-2-one, m.p. 211°-212° C.

1. additionA suspension of 500 mg
2. customThe solution was evaporated in vacuo
3. customleaving a crystalline residue which
4. customwas recrystallized from 20 ml