Counter-Ion-Dependent Alkyne Iminium Ion Cyclization for Divergent Synthesis of N-Fused Indolylidine, Indole, and Indoline Derivatives Promoted by the Lewis/Bronsted Acid
摘要:
Divergent synthesis of N-fused indolylidine, indole, and indoline derivatives using alkyne iminium ion cyclization is described. Trapping of vinyl cation intermediate generated after alkyne iminium ion cyclization was found to be dependent on the Lewis/Bronsted acid and solvent used. N-Fused indolylidine triflate could be used in the divergent synthesis of N-fused indole derivatives.
Preparation of reusable copper-based biomass-carbon aerogel catalysts and their application in highly selective reduction of maleimides to succinimides with hydrosilane as a hydrogen source
aerogel construction, and customizable carbonization was designed for the reduction of copper trifluoromethane sulfonate (Cu(OTf)2) to Cu(0) and Cu(I) on the CAC. The Cu(OTf)2@CAC exhibited excellent catalytic activity, chemo-selectivity, and recyclability for selective maleimide reduction to succinimides under mild conditions. Moreover, the Cu(OTf)2@CAC can be reused six times without noticeably losing
Sanna, Gazzetta Chimica Italiana, 1927, vol. 57, p. 768
作者:Sanna
DOI:——
日期:——
Radical-mediated dehydrative preparation of cyclic imides using (NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>–DMSO: application to the synthesis of vernakalant
作者:Dnyaneshwar N Garad、Subhash D Tanpure、Santosh B Mhaske
DOI:10.3762/bjoc.11.113
日期:——
efficient and new dehydrating reagent for a convenient one-pot process for the synthesis of miscellaneous cyclic imides in high yields starting from readily available primary amines and cyclic anhydrides. A plausible radical mechanism involving DMSO has been proposed. The application of this facile one-pot imide forming process has been demonstrated for a practical synthesis of vernakalant.
Counter-Ion-Dependent Alkyne Iminium Ion Cyclization for Divergent Synthesis of <i>N</i>-Fused Indolylidine, Indole, and Indoline Derivatives Promoted by the Lewis/Bronsted Acid
作者:Santosh J. Gharpure、Yogesh G. Shelke、Dasari Praveen Kumar
DOI:10.1021/acs.orglett.5b00615
日期:2015.4.17
Divergent synthesis of N-fused indolylidine, indole, and indoline derivatives using alkyne iminium ion cyclization is described. Trapping of vinyl cation intermediate generated after alkyne iminium ion cyclization was found to be dependent on the Lewis/Bronsted acid and solvent used. N-Fused indolylidine triflate could be used in the divergent synthesis of N-fused indole derivatives.