The Cs<sub>2</sub>CO<sub>3</sub>–Catalyzed Reaction of 2-Oxindoles with Enones for the Preparation of Indolin-3-Ones and Their Further Transformation
作者:Ying Shao、Yu-Mei Zeng、Jie-Ying Ji、Xiao-Qiang Sun、Hai-Tao Yang、Chun-Bao Miao
DOI:10.1021/acs.joc.6b01993
日期:2016.12.16
The Cs2CO3-catalyzed reaction of 2-oxindoles with enones affords 2,2-disubstituted indolin-3-ones through domino “Michael addition–oxidation–ring-cleavage–C–N coupling” process. O2 acts as the sole oxidant to accomplish the oxidative process. The indolin-3-ones can be further transformed to pyridazine, azirdine-fused 3-oxindoles, 4-quinolone derivatives easily.
Cs 2 CO 3催化的2-氧吲哚与烯酮的反应通过多米诺“迈克尔加成-氧化-环断裂-C-N偶联”过程得到2,2-二取代的吲哚-3-酮。O 2充当完成氧化过程的唯一氧化剂。吲哚-3-酮可以容易地进一步转化为哒嗪,阿兹丁稠合的3-氧吲哚,4-喹诺酮衍生物。