Facile construction of highly functionalized 2-pyrrolines via FeCl3-catalyzed reaction of aziridines with arylalkynes
作者:Jinmin Fan、Linfeng Gao、Zhiyong Wang
DOI:10.1039/b910408a
日期:——
A series of highly functionalized 2-pyrrolines have been constructed by using a novel FeCl(3)-catalyzed reaction of aziridines with arylalkynes, in which an aryl-substituted alkenyl cation is involved.
Ring-opening formal hetero-[5+2] cycloaddition of 1-tosyl-2,3-dihydro-1<i>H</i>-pyrroles with terminal alkynes: entry to 1-tosyl-2,3-dihydro 2,3-dihydro-1<i>H</i>-azepines
作者:Ming-Bo Zhou、Rui Pi、Fan Teng、Yang Li、Jin-Heng Li
DOI:10.1039/c9cc05082e
日期:——
A new Lewis acid catalysed formal hetero-[5+2] cycloaddition of 2,3-dihydro-1H-pyrroles to terminal alkynes is described. By employing a FeCl3 and BF3·OEt2 co-catalytic strategy, the ring-opening of 1-tosyl-2,3-dihydro-1H-pyrroles by selectivecleavage of the C(sp2)–N bond and subsequent annulation have been achieved to access 1-tosyl-2,3-dihydro-1H-azepines with excellent regioselectivity, offering
Rhodium(III)-Catalyzed [3+2] Annulation of 5-Aryl-2,3-dihydro-1<i>H</i>-pyrroles with Internal Alkynes through C(sp<sup>2</sup>)H/Alkene Functionalization
作者:Ming-Bo Zhou、Rui Pi、Ming Hu、Yuan Yang、Ren-Jie Song、Yuanzhi Xia、Jin-Heng Li
DOI:10.1002/anie.201407175
日期:2014.10.13
This study describes a new rhodium(III)‐catalyzed [3+2] annulation of 5‐aryl‐2,3‐dihydro‐1H‐pyrroles with internal alkynes using a Cu(OAc)2 oxidant for building a spirocyclic ring system, which includes the functionalization of an aryl C(sp2)H bond and addition/protonolysis of an alkene CC bond. This method is applicable to a wide range of 5‐aryl‐2,3‐dihydro‐1H‐pyrroles and internal alkynes, and