Unexpected stereoselective CuBr<sub>2</sub>-catalyzed cascade reaction of 2-ethynylanilines with silylynamides: facile and atom-economical access to <i>N</i>-vinylsilylindoles
作者:Zengzeng Li、Fei Lu、Qingchun Xu、Gang Liu、Ximei Zhao、Guanghui Wang
DOI:10.1039/d3gc04244h
日期:——
A stereoselective copper-catalyzed cascade reaction of 2-ethynylanilines with silylynamides has been developed. In this protocol, inexpensive CuBr2 is utilized as the catalyst. This simple, ligand-free, and cost-effective catalytic system furnishes valuable N-vinylsilylindoles in good to excellent yields, with perfect stereoselectivity in open air. Its potential synthetic applicability is illustrated
Intramolecular cyclization of ortho-alkynylanilines by Rh(I)-catalyzed hydroamination to yield benzo(dipyrroles)
作者:Guy K.B. Clentsmith、Leslie D. Field、Barbara A. Messerle、Adelle Shasha、Peter Turner
DOI:10.1016/j.tetlet.2009.01.060
日期:2009.4
The methylene-bridged Rh(1) dicarbonyl complex, [Rh(bim)(CO)(2) BPh4 (1) (bim = bis(N-methylimidazol-2-yl)methane), is an effective catalyst for the intramolecular hydroamination of selected ortho-alkynylanilines to give a range of benzo(dipyrroles). (C) 2009 Elsevier Ltd. All rights reserved.
Benzodipyrrole-based Donor-Acceptor-type Boron Complexes as Tunable Near-infrared-Absorbing Materials
Benzodipyrrole‐based donor–acceptor boron complexes were designed and synthesized as near‐infrared‐absorbing materials. The electron‐rich organic framework combined with the Lewis acidic boron co‐ordination enabled us to tune the LUMO energy level and the HOMO–LUMO gap (i.e.,the absorption wavelength) by changing the organic acceptor units, the number of boron atoms, and the substituents on the boron atoms