反应详情

m-Diethylaminophenol 7.4g, malic acid 6.0g and 85% sulfuric acid 12.0ml were treated as for the 7-dimethylamino-coumarin, although the alumina column cut could not be induced to crystallize. It was rechromatographed, eluting first with benzene thoroughly, and then developing with dichloromethane. After two crystallizations from cyclohexane, cream colored crystals 0.5g (5%), m.p. 87.5°-88.0° were obtained, found C 71.94; H 7.09; N 6.35; C13H15NO2 requires C 7.19; H 6.92; N 6.45%.

1. customto crystallize
2. customIt was rechromatographed
3. washeluting first with benzene thoroughly
4. customAfter two crystallizations from cyclohexane, cream colored crystals 0.5g (5%)
5. customm.p. 87.5°-88.0° were obtained