polysubstituted 4-quinolones was conveniently prepared via simple and practical protocol involving N-alkylation of 2-(3-oxoindolin-2-yl)acetonitriles and following NaH-induced ring expansion. The current two-step approach provides feasible access to a subclass of N-protected C3-aryl-substituted 2-phenyl-4-quinolones starting with or just one step away from commercially available 2-arylindoles and nitrostyrenes
通过简单实用的方案,包括2-(3-氧代
吲哚啉-2-基)
乙腈的N-烷基化以及 NaH 诱导的扩环,可以方便地制备 18 种多取代的 4-
喹诺酮文库。目前的两步法提供了一种可行的方法,从市售的2-芳基
吲哚和硝基
苯乙烯开始或仅一步之遥,即可获得N-保护的C3-芳基取代的2-苯基-4-
喹诺酮亚类。