反应详情

4-Nitrobenzyl bromide (540 mg) was added to a mixture of 1,2-dihydro-1-carboethoxy-3H-indazol-3-one (206 mg) and potassium hydroxide (67 mg) in ethanol (10 ml). The mixture was heated under reflux for 30 minutes. The cooled solution was clarified by filtration and the filtrate was evaporated. The residue was purified by column chromatography using methylene chloride as eluant to give 1,2-dihydro-1-carboethoxy-2-(4-nitrobenzyl)-3H-indazol-3-one (Ex. 39) as a solid, m.p. 123-124° C. in 59% yield.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 30 minutes
3. filtrationThe cooled solution was clarified by filtration
4. customthe filtrate was evaporated
5. customThe residue was purified by column chromatography