Manganese(III) acetate mediated oxidative radical cyclizations of α-substituted N-[(E)-stilben-2-yl]acetamides
作者:Ghien-An Lin、Che-Ping Chuang
DOI:10.1016/j.tet.2015.05.043
日期:2015.7
3-substituted 2-quinolinones from readily available α-substituted N-[(E)-stilben-2-yl]acetamides have been developed. α-Carbonylalkyl radical, produced by the manganese(III) acetate oxidation of N-[(E)-stilben-2-yl]acetamides, undergoes an intramolecular 6-exo-dig cyclization onto the CC bond efficiently and 2-quinolinones was produced. A variety of functional groups, including benzoyl, acetyl, cyano, and
已经开发了从容易获得的α-取代的N -[(E)-stilben-2-yl]乙酰胺合成3-取代的2-喹啉酮的方法。由N -[(E)-stilben-2-yl]乙酰胺的乙酸锰(III)氧化产生的α-羰基烷基自由基经过分子内6-exo-dig环化反应成C C键,而2-喹啉酮为生产的。各种官能团,包括苯甲酰基,乙酰基,氰基和乙氧基羰基,均与反应条件相容。在Mn(II)/ Co(II)/ O 2条件下,这些N -[(E)-斯蒂苯-2-(基)乙酰胺也有效地转化为相应的2-喹啉酮,并使用催化量的乙酸锰(II)。