Anti-Markovnikov Hydroheteroarylation of Unactivated Alkenes with Indoles, Pyrroles, Benzofurans, and Furans Catalyzed by a Nickel–<i>N</i>-Heterocyclic Carbene System
作者:York Schramm、Makoto Takeuchi、Kazuhiko Semba、Yoshiaki Nakao、John F. Hartwig
DOI:10.1021/jacs.5b08039
日期:2015.9.30
benzofurans, and furans, to unactivated terminal and internal alkenes. The reaction is catalyzed by a combination of Ni(COD)2 and a sterically hindered, electron-rich N-heterocyclic carbene ligand or its analogous Ni(NHC)(arene) complex. The reaction is highly selective for anti-Markovnikov addition to α-olefins, as well as for the formation of linear alkylheteroarenes from internal alkenes. The reaction occurs
Copper(II)-Promoted, One-Pot Conversion of 1-Alkynes with Anhydrides or Primary Amines to the Respective 2,5-Disubstituted Furans or Pyrroles under Microwave Irradiation Conditions
作者:Hyejeong Lee、Yeonhui Yi、Chul-Ho Jun
DOI:10.1002/adsc.201500711
日期:2015.11.16
Furans and pyrroles are prepared from 1-alkynes by using a Cu(II)-promoted, one-pot, microwaveirradiation method. Glaser coupling of 1-alkynes and cyclization of the resulting 1,3-diyne in the presence of an anhydride or a primaryamine results in the formation of the respective 2,5-diaryl- or 2,5-dialkyl-substituted furans and pyrroles.