New Types of Reactivity of α,β‐Unsaturated
<i>N</i>
,
<i>N</i>
‐Dimethylhydrazones: Chemodivergent Diastereoselective Synthesis of Functionalized Tetrahydroquinolines and Hexahydropyrrolo[3,2‐
<i>b</i>
]indoles
作者:Vellaisamy Sridharan、Pascual Ribelles、Verónica Estévez、Mercedes Villacampa、M. Teresa Ramos、Paramasivan T. Perumal、J. Carlos Menéndez
DOI:10.1002/chem.201103562
日期:2012.4.16
imines and α,β‐unsaturated N,N‐dimethylhydrazones in acetonitrile afforded 1,2,3,4‐tetrahydroquinolines bearing a hydrazone function at C4 through a one‐pot diastereoselective domino process that involves the formation of two CC bonds and the controlled generation of two stereocenters, one of which is quaternary. This reaction constitutes the first example of an α,β‐unsaturated dimethylhydrazone that behaves
乙腈中的芳族亚胺与α,β-不饱和N,N - N-二甲基hydr之间的三氯化铟催化反应提供了1,2,3,4-四氢喹啉,其通过一锅非对映选择性多米诺过程在C4处具有功能两个CC键和两个立体中心的受控生成,其中一个是四元的。该反应构成了α,β-不饱和二甲基hydr的第一个例子,在杂Diels-Alder反应中表现为亲双烯体。苯胺类,芳香醛,和在CHCl甲基丙烯醛二甲基腙之间的相关反应3与BF 3 ⋅Et 2O作为催化剂,通过完全非对映选择性的ABB'C四组分多米诺过程提供多取代的1,2,3,3a,4,8b-六氢吡咯并[3,2- b ]吲哚作为主要产物,该过程产生两个循环,三个立体中心,两个ç C键,和两个C 在单个操作中N键。