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
Copper-catalyzed heteroannulation: a simple route to the synthesis of pyrrolo[2,3-b]carbazole and pyrrolo[2,3-b]quinoline derivatives
作者:K.S. Prakash、Rajagopal Nagarajan
DOI:10.1016/j.tetlet.2014.10.070
日期:2015.1
A simple and efficient method for the synthesis of biologically important pyrrolo[2,3-b]carbazoles and pyrrolo[2,3-b]quinolines is described. This involves the reaction of corresponding carbazole or quinoline-1,2-haloaldehyde with isocyanoacetate via copper catalyzed heteroannulation in good yields.
描述了一种简单有效的合成重要的生物吡咯并[2,3- b ]咔唑和吡咯并[2,3- b ]喹啉的方法。这涉及相应的咔唑或喹啉1,2,-卤代醛与异氰基乙酸酯通过铜催化的异环反应以良好的产率进行反应。
Synthesis of Cyclopentacarbazolones via Palladium-Catalyzed Annulation of Internal Alkynes
efficient protocol for the synthesis of highly substituted cyclopentacarbazolones (50-82%) was developed by employing internalalkynes with 2-bromo-3-formylcarbazoles in the presence of palladium catalyst under ligand-free condition. High regioselectivity was observed for unsymmetrical (alkyl-, aryl-substituted) internalalkynes. estrogen receptors - palladium catalyst - annulations - cyclopentacarbazolones
Copper- or Palladium-Catalyzed Amidation and Cyclization Route for the Synthesis of Pyrimido[4,5-b]carbazoles
作者:Rajagopal Nagarajan、Arepalli Kumar
DOI:10.1055/s-0033-1339490
日期:——
Abstract Pyrimido[4,5-b]carbazole derivatives were synthesized by a copper- or palladium-catalyzed sequential amidation and cyclization process in which a C–N bond formed at the 2-position of a 3-formylcarbazole afforded a new 9-substituted N-(3-formyl-9H-carbazol-2-yl)amide. Pyrimido[4,5-b]carbazole derivatives were synthesized by a copper- or palladium-catalyzed sequential amidation and cyclization
摘要 嘧啶[4,5- b ]咔唑衍生物是通过铜或钯催化的连续酰胺化和环化过程合成的,其中在3-甲酰基咔唑的2-位形成的C–N键提供了一个新的9-取代的N -(3-甲酰基-9 H-咔唑-2-基)酰胺。 嘧啶[4,5- b ]咔唑衍生物是通过铜或钯催化的连续酰胺化和环化过程合成的,其中在3-甲酰基咔唑的2-位形成的C–N键提供了一个新的9-取代的N -(3-甲酰基-9 H-咔唑-2-基)酰胺。