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
进行了系统的研究与2-溴-6-甲氧基苯并呋喃-3-one环-1,3-二酮烷基化。在乙酸中与对位取代的苯胺缩合后,O-烷基化产物3a得到缩合的γ-内酰胺杂环4。相反,类似的O-烷基化衍生物3b和3c与对位取代的苯胺的缩合提供了取代的x吨酮衍生物6和7a。形成的可能机制4,6和图7a进行了讨论。