An efficient KHSO4 catalyzed synthesis of xanthenes

[摘要] KHSO 4 is an efficient catalyst for the condensation of β-naphthol, aromatic aldehydes, and 5,5-dimethyl-1,3-cyclohexanedione at 100°C to afford 9,9-dimethyl-12-phenyl-8,10,11,12-tetrahydro-9 H -benzo[ a ]xanthen-11-one derivatives in 80–95% yields.

[学科分类] 内科医学

[关键词] aromatic aldehydes;5;5-dimethyl-1;3-cyclohexanedione;KHSO4;β-naphthol;xanthenes