A Convenient and Simple Method for the Synthesis of Condensed γ-Lactams and Substituted Xanthones from Cyclic-1,3-diketones
作者:B Chandrasekhar、S.R Ramadas、D.V Ramana
DOI:10.1016/s0040-4020(00)00484-1
日期:2000.8
A systematic study of alkylation of cyclic-1,3-diones with 2-bromo-6-methoxybenzofuran-3-one was undertaken. Upon condensation in acetic acid with p-substituted aniline the O-alkylated product 3a gave condensed γ-lactam heterocycle 4. In contrast, the condensation of analogous O-alkylated derivatives 3b and 3c with p-substituted anilines furnished the substituted xanthone derivatives 6 and 7a. The