Diels-Alder cycloadditions of 2(1H)-quinolones having an electron-withdrawing group at the 3-position with alkyl- and silyloxy-1, 3-butadienes (2a, b) were carried out to give phenanthridones richly functionalized regio- or stereoselectively under conditions of atmospheric and high pressure. Furthermore, regioselectivity and chemoselectivity of 3-substituted 2(1H)-quinolones to 2a, b were examined using MO calculation.
在大气压力及高压条件下,于3-位带有吸电子基团的2(1H)-
喹诺酮与烷基-及
硅氧基-
1,3-丁二烯(2a, b)进行Diels-Alder环加成反应,可区域选择性或立体选择性地得到富功能化的
菲啶酮。此外,利用分子轨道计算,对3-取代的2(1H)-
喹诺酮与2a, b的区域选择性及
化学选择性进行了研究。