A General Synthesis of Alkenyl‐Substituted Benzofurans, Indoles, and Isoquinolones by Cascade Palladium‐Catalyzed Heterocyclization/Oxidative Heck Coupling
作者:Rosana Álvarez、Claudio Martínez、Youssef Madich、J. Gabriel Denis、José M. Aurrecoechea、Ángel R. de Lera
DOI:10.1002/chem.201001535
日期:2010.11.8
consecutive Sonogashira and cascade Pd‐catalyzed heterocyclization/oxidative Heck couplings from readily available ortho‐iodosubstituted phenol, aniline, and benzamide substrates, alkynes, and functionalized olefins. The cyclization of O‐ and N‐heteronucleophiles follows regioselective 5‐endo‐dig‐ or 6‐endo‐dig‐cyclization modes, whereas the subsequent Heck‐type coupling with both mono‐ and disubstituted
通过使用连续的Sonogashira和级联的Pd催化的杂环/氧化Heck偶联反应,可以容易地从邻位碘取代的苯酚,苯胺和苯甲酰胺和苯甲酰胺底物,炔烃和官能化的烯烃中高效地制备结构多样的C3-烯基苯并呋喃,C3-烯基吲哚和C4-烯基异喹啉酮。。O-和N- heteronucleophiles的环化如下区域选择性5-内切-挖-或6-内-挖-cyclization模式,而用两个单和二取代的烯烃随后的Heck型偶联发生立体选择性地与所述的只形成ë大多数情况下是异构体。