Carbazoles were successfully synthesized by oxidative cyclization of the corresponding diaryl derivatives using electrochemically generated hypervalent iodine oxidant. Electron-withdrawing nitro and donating methoxy groups at the para position of the acetamide group interfered with cyclization. Glycozoline (8) was successfully synthesized in five steps with 50% overall yield.
Pd(<scp>ii</scp>) pincer type complex catalyzed tandem C–H and N–H activation of acetanilide in aqueous media: a concise access to functionalized carbazoles in a single step
One-pot, tandem C-H and N-H activation of acetanilides with aryl boronic acids to realize functionalized carbazoles were conveniently performed under aerobic conditions using a novel NNO pincer type Pd(II)complex [Pd(L)Cl]...
Palladium nanomaterials in catalytic intramolecular C–H amination reactions
作者:Leng Leng Chng、Jun Yang、Yifeng Wei、Jackie Y. Ying
DOI:10.1039/c4cc03551h
日期:——
Supported palladium nanomaterials catalyzed an intramolecular CâH amination reaction to produce carbazoles in moderate to excellent isolated yields, up to 92%.
Combined C−H Functionalization/C−N Bond Formation Route to Carbazoles
作者:W. C. Peter Tsang、Nan Zheng、Stephen L. Buchwald
DOI:10.1021/ja055353i
日期:2005.10.1
A new method in which a series of substituted carbazoles is efficiently produced by the combination of an amide and an arene is described. The key feature of this method is the palladium-catalyzed tandem directed C-H functionalization and amide arylation. The method tolerates substitution on either ring of the biaryl amide substrates, and the products can be assembled in a simple two-step protocol from readily available reagents. The Pd(0) species generated are reoxidized to Pd(II) in the presence of Cu(OAc)2 and an atmosphere of oxygen.
Synthesis of the Carbazole Scaffold Directly from 2-Aminobiphenyl by Means of Tandem C-H Activation and C-N Bond Formation
作者:Hans-René Bjørsvik、Vijayaragavan Elumalai
DOI:10.1002/ejoc.201601191
日期:2016.11
An efficient method for the synthesis of the carbazolescaffold was designed and investigated. The method was developed to produce substituted carbazoles by an intramolecular combination of a free amine group and an arene. The steps of the method involved tandem Pd-catalyzed C–Hactivation and intramolecular C–Nbondformation. The method showed good functional group tolerance, and substituent(s) could