Manganese(III) acetate mediated oxidative radical cyclizations of α-substituted N-[2-(phenylethynyl)phenyl]acetamides
作者:Che-Ping Chuang、Yan-Jhu Chen
DOI:10.1016/j.tet.2016.02.041
日期:2016.4
An effective method for the synthesis of 3,4-disubstituted quinolin-2(1H)-ones was reported. α-Carbonylalkyl radical, produced by the manganese(III) acetate oxidation of α-substituted N-[2-(phenylethynyl)phenyl]acetamides, undergoes a 6-exo-dig cyclization onto the C–C triple bond efficiently and 3,4-disubstituted quinolin-2(1H)-ones were produced. Heterocyclic substrates could also be used to generate
报道了一种有效的合成3,4-二取代的喹啉-2(1 H)-ones的方法。由α-取代的N- [2-(苯基乙炔基)苯基]乙酰胺的乙酸锰(III)氧化产生的α-羰基烷基自由基经过6-exo-dig环化反应,形成CC-C三键,3,4制备了双取代的喹啉-2(1 H)-1 。杂环底物也可用于平稳地产生相应的喹啉-2(1 H)-一。各种官能团,包括甲氧基羰基,氰基,二乙氧基磷酰基和苯甲酰基,都与反应条件相容。在Mn(II)/ Co(II)/ O 2条件下,这些喹啉2(1 H也可以从相应的N- [2-(苯基乙炔基)苯基]乙酰胺中获得一个,并使用催化量的乙酸锰(II)。