Harnessing Protonated 2,2′-Bipyridinium Salts as Powerful Brønsted Acid Catalysts in Organic Reactions
作者:Wen Hu、Jiaqi Xiang、Qi Zhou、Xinyu Gao
DOI:10.1021/acs.joc.2c02239
日期:——
time that the readily available protonated 2,2′-bipyridinium salts are used as Brønsted acid catalysts to accelerate a series of organic transformations that included the hydration of aromatic alkynes, etherification of alcohols, cyclotrimerization of aliphatic aldehydes, Ritter reaction, Mannich reaction, Biginelli reaction, preparation of substituted alkenes from alcohols, synthesis of spirooxindole
这是首次将现成的质子化2,2'-联吡啶盐用作布朗斯台德酸催化剂,加速一系列有机转化,包括芳香炔烃的水合、醇的醚化、脂肪醛的环三聚、里特反应、 Mannich 反应、Biginelli 反应、从醇制备取代烯烃、螺氧吲哚、双吲哚基甲烷和未环化四酮的合成,收率从好到高。这些结果有力地表明,质子化 2,2'-联吡啶催化体系的发展具有巨大的潜力。