反应详情

To a stirred solution of methyl lithium (0.04 mole, 20 ml of a 1.9 M solution in ether) under nitrogen at ambient temperature was added portionwise 7-hydroxy-4-(2-naphthyl)coumarin (2.89 g, 0.01 mole). After 5 hours the solution was decomposed with acid to give 2,2-dimethyl-4-(2-naphthyl)-2H-chromen-7-ol as a crude dark brown foam (2 g) which was used without further purification.