4-喹诺酮类是许多药物活性化合物的结构元素。尽管已知有几种合成方法,但在 2 位引入芳环对大多数方法来说都是有问题的。此前曾报道,在钌或钯配合物的催化下,通过加压 CO 进行邻硝基查耳酮的还原环化是实现这一目标的可行合成策略,但对加压 CO 管线和高压釜的需求阻碍了其广泛使用。在本文中,我们描述了使用甲酸/乙酸酐混合物作为 CO 替代物,这使得我们能够在廉价且市售的厚壁玻璃管中进行反应,而无需添加任何气态试剂。所获得的产率通常很高,与之前报道的使用加压 CO 的产率相比毫不逊色。该方法适用于从市售且廉价的生物碱 Graveoline 试剂进行三步合成。
An efficient one-step synthesis of 2-arylquinolin-4(1H)-ones with the aid of a low-valent titanium reagent
作者:Fang Sun、Xuan Zhao、Daqing Shi
DOI:10.1016/j.tetlet.2011.08.089
日期:2011.10
A short and facile synthesis of a series of 2-arylquinolin-4(1H)-ones was accomplished in good yields via the novel reductive cyclization of 2-nitrochalcones promoted by TiCl4/Zn. This method has the advantages of accessible starting materials, one-step procedure, convenient manipulation, and moderate to high yields.
1,3-Disubstituted-2-carboxy quinolones: highly potent and selective endothelin A receptor antagonists
作者:Jean-Luc Haesslein、Isabelle Baholet、Michel Fortin、Alain Iltis、Jean Khider、Anne Marie Periers、Christine Pierre、Jean-Paul Vevert
DOI:10.1016/s0960-894x(00)00264-x
日期:2000.7
The design, synthesis, and in vitro biological activity of a series of 2-carboxy quinolone antagonistsselective for the endothelin A receptor are presented. Introduction of a second acid group in position 3 of the quinolone ring increases dramatically the selectivity for ET(A).