反应详情

To 13.5 g. of 5-(3-methyl-2-octyl)-resorcinol and 10.5 g. of 4,4-dimethyl-2-carboethoxycyclopentanone [Canadian J. of Chem. 47, 1982-1988 (1969)] in 59 ml. of benzene was added 4.3 ml. of phosphorous oxychloride with stirring and refluxing for 6 hours. After the red solution was allowed to stand at room temperature for 8 hours, it was added to an ice an sodium carbonate solution. The colorless mixture was extracted with ether, dried over magnesium sulfate and concentrated. The mixture was extracted with cold pentane and the pentane was discarded. Theresidue [9-hydroxy-7-(3-methyl-2-octyl)-2,2,-dimethyl-4-oxo-1,2,3,4-tetrahydrocyclopenta[c] [1]benzopyran] was obtained as a gummy solid.

1. temperaturerefluxing for 6 hours
2. extractionThe colorless mixture was extracted with ether
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated
5. extractionThe mixture was extracted with cold pentane