反应详情

0.1 mole resorcinol is reacted with 0.1 mole ethyl o-nitrobenzoylacetate in methanol at 0° C. while passing through for one hour gaseous hydrochloric acid, and then maintaining at ambient temperature for 24 hours. After recrystallisation from an acetone-water mixture, there are obtained 18 grams 4-o-nitrophenyl-7-hydroxy-coumarin. This compound melts at 230° C.

1. customAfter recrystallisation from an acetone-water mixture, there