Transition-Metal-Free Access to Pyridocarbazoles from 2-Alkynylindole-3-carbaldehydes via Azomethine Ylide
作者:Shalini Verma、Pawan K. Mishra、Manoj Kumar、Souvik Sur、Akhilesh K. Verma
DOI:10.1021/acs.joc.8b00980
日期:2018.6.15
An efficient approach for the synthesis of functionalized tetrahydro-pyrido/quinolinocarbazoles from 2-alkynylindole-3-carbaldehydes and l-proline utilizing a metal-free decarboxylative cyclization, ring expansion, and ring contraction strategy via the generation of azomethine ylide was developed. The reaction of 2-alkynylindole-3-carbaldehydes with l-thioproline leads to the formation of γ-carbolines
Synthesis of the new benzimidazo[2,1-a]ellipticine derivatives via tandem inter and intramolecular, 5-endo,6-endo cyclization of various 9-ethyl-2-(alkynyl)carbazole-3-carbaldehydes with different 1,2-aryldiamines is reported under metal free condition in good yields.
A General Method for the Synthesis of 5H-Benzo[b]-, Carbazolo[2,3-b]- and Indolo[2,3-b]carbazole Derivatives via Copper(II) Triflate-Catalyzed Heteroannulation
作者:K. S. Prakash、Rajagopal Nagarajan
DOI:10.1002/adsc.201100887
日期:2012.5.21
A straightforward approach for the construction of 5H‐benzo[b]‐, carbazolo[2,3‐b]‐ and indolo[2,3‐b]carbazolederivatives has been developed by using copper(II) triflate‐catalyzed heteroannulation.
通过使用三氟甲磺酸铜(II)催化的杂环化反应,已经开发出了一种简单的方法来构建5 H-苯并[ b ]-,咔唑[2,3- b ]-和吲哚[2,3- b ]咔唑衍生物。