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Supported palladium hydroxide-catalyzed intramolecular double CH bond functionalization for synthesis of carbazoles and dibenzofurans

Paper ID Volume ID Publish Year Pages File Format Full-Text
45960 46427 2014 9 PDF Available
Title
Supported palladium hydroxide-catalyzed intramolecular double CH bond functionalization for synthesis of carbazoles and dibenzofurans
Abstract

•Pd(OH)2/ZrO2 catalyzed intramolecular coupling of double CH bonds to form CC bonds.•Carbazoles and dibenzofurans were obtained over Pd(OH)2/ZrO2 with high selectivity.•Pd(OH)2/ZrO2 could be recycled.

Metal oxide-supported palladium hydroxide (Pd(OH)2/MOx) catalysts enabled the oxidative intramolecular couplings of diarylamines to carbazoles and diarylethers to dibenzofurans via double aryl CH bond functionalizations with molecular oxygen as the sole oxidant. While supported PdO, Pd, and palladium acetate catalysts showed poor catalytic activities, supported Pd(OH)2 exhibited remarkably high catalytic activity. Among supported Pd(OH)2 catalysts, Pd(OH)2/ZrO2 was found to be an efficient catalyst in terms of catalytic activities and selectivities for the synthesis of carbazoles and dibenzofurans.

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Keywords
CH functionalization; Carbazole; Dibenzofuran; Palladium hydroxide; Heterogeneous catalyst
First Page Preview
Supported palladium hydroxide-catalyzed intramolecular double CH bond functionalization for synthesis of carbazoles and dibenzofurans
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 150–151, 5 May 2014, Pages 523–531
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis