反应详情

Add a spatula tip of zinc to a solution of 40 mg of the compound of Step 2 in acetic acid. After 30 minutes' stirring, concentrate to dryness under reduced pressure, take up in water and extract with dichloromethane. The crude product obtained by concentrating to dryness is purified by chromatography on a silica column (eluant: petroleum ether/ethyl acetate, 6/4). The title product is obtained in the form of an oil in a yield of 60%. ##STR63##

1. concentrationconcentrate to dryness under reduced pressure
2. extractionextract with dichloromethane
3. customThe crude product obtained
4. concentrationby concentrating to dryness
5. customis purified by chromatography on a silica column (eluant: petroleum ether/ethyl acetate, 6/4)