反应详情

Ethyl 5-[o-(chloromethyl)benzoyl]-3-ethoxycarbonyl-4-hydroxy-1-methylpyrrole-2-acetate (525 mg, 1.29 mmol) is suspended in 5 ml dry DMF under nitrogen followed by subsequent addition of sodium hydride (68 mg, 1.42 mmol, 50% dispersion in oil). Gas is evolved and the reaction turns dark brown. The mixture is stirred for one hour, then the solution is poured into water (50 ml). Upon agitation, a solid separates which is filtered and dried. The crude material is recrystallized from ethanol to give 426 mg (90%) of ethyl 5,10-dihydro-3-ethoxycarbonyl-1-methyl-10-oxo-1H-[2]benzoxepino[4,3-b]pyrrole-2-acetate.

1. filtrationUpon agitation, a solid separates which is filtered
2. customdried
3. customThe crude material is recrystallized from ethanol