Carbanionic Friedel−Crafts Equivalents. Regioselective Directed <i>Ortho</i> and Remote Metalation−C−N Cross Coupling Routes to Acridones and Dibenzo[<i>b</i>,<i>f</i>]azepinones
作者:Stephen L. MacNeil、Matthew Gray、Dmitry G. Gusev、Laura E. Briggs、Victor Snieckus
DOI:10.1021/jo801856n
日期:2008.12.19
respectively, in good to excellent yields with regioselectivity which depends upon the presence or absence of directedmetalation groups (DMGs). Brief investigations as follows are described: the synthesis of desmethyl acridone 15 (Scheme 4), an attempt to effect a double-directed remote metalation sequence which leads only to a monocyclization product 13 (Scheme 3), and an analogous but nonregioselective