Cp*Co(III)-Catalyzed Regioselective Synthesis of Cyclopenta[<i>b</i>]carbazoles via Dual C(sp<sup>2</sup>)–H Functionalization of 1-(Pyridin-2-yl)-indoles with Diynes
作者:Qiuyun Li、Yanwei Wang、Bin Li、Baiquan Wang
DOI:10.1021/acs.orglett.8b03438
日期:2018.12.21
Cp*Co(III)-catalyzedsynthesis of cyclopenta[b]carbazoles from 1-(pyridin-2-yl)-indoles and diynes is developed. This reaction involves dual C–H activation of indoles and domino cyclizations with diynes and has excellent regioselectivity, high efficiency, a broad substrate scope, and tolerance for various functional groups. A series of cyclopenta[b]carbazole molecular scaffolds are obtained in good
开发了Cp * Co(III)催化的1-(吡啶-2-基)-吲哚和二炔合成环戊[ b ]咔唑的方法。该反应涉及吲哚的双重C–H活化和带有二炔的多米诺环化反应,具有出色的区域选择性,高效率,广泛的底物范围以及对各种官能团的耐受性。以良好或优异的产率获得了一系列环戊[ b ]咔唑分子支架。
Iridium- and Rhodium-Catalyzed [2+2+2] Cycloadditions of Diynes with Maleimide: A New Synthetic Route to Highly Substituted Phthalimides
α,ω-diynes in the presence of [IrCl(cod)] 2 or [RhCl(cod)] 2 and DPPE gives cyclohexadiene derivatives which are readily aromatized with DDQ or MnO 2 . This two-step procedure gives access to highlysubstituted phthalimides in good yields.
Rh<sup>III</sup>-Catalyzed Synthesis of Cyclopenta[<i>b</i>]carbazoles via Cascade C–H/C–C Bond Cleavage and Cyclization Reactions: Using Amide as a Traceless Directing Group
作者:Yanwei Wang、Bin Li、Baiquan Wang
DOI:10.1021/acs.orglett.9b03969
日期:2020.1.3
Rhodium-catalyzed cascade C-H/C-C cleavage and cyclization reactions of 3-amide substituted indoles with diynes to construct cyclopenta[b]carbazoles have been developed. A strategy amide worked as a novel traceless directing group along with C-C bondcleavage via Friedel-Crafts-retro reaction has been disclosed in this protocol. This method exhibits a broad substrate scope and tolerates various functional