Synlett 2014; 25(07): 911-919
DOI: 10.1055/s-0033-1340174
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© Georg Thieme Verlag Stuttgart · New York

Palladium-Catalyzed Decarboxylative Cross-Coupling of α-Oxocarboxylic Acids and Their Derivatives

Jinmin Miao
Department of Chemistry and Chemical Biology, Indiana University – Purdue University Indianapolis, IN 46202, USA   Fax: +1(317)2744701   Email: geh@iupui.edu
,
Haibo Ge*
Department of Chemistry and Chemical Biology, Indiana University – Purdue University Indianapolis, IN 46202, USA   Fax: +1(317)2744701   Email: geh@iupui.edu
› Author Affiliations
Further Information

Publication History

Received: 29 August 2013

Accepted after revision: 10 December 2013

Publication Date:
31 January 2014 (online)


Abstract

The development of palladium(II)-catalyzed decarboxylative cross-coupling of α-oxocarboxylic acids and their derivatives is summarized in this account. Acetanilides, 2-phenyl-pyridines, and benzoic acids were found to be suitable substrates for direct acylation through decarboxylative cross-coupling with α-oxo­carboxylic acids. Potassium aryl trifluoroborates were also transformed into ketones, amides, and esters with α-oxocarboxylic acids, oxamic acids, and oxalate monoesters, respectively, in modified catalytic systems.

1 Introduction

2 Palladium-Catalyzed Decarboxylative Cross-Coupling Through C–H Bond Functionalization

2.1 Direct ortho-Acylation of Acetanilides

2.2 Direct Acylation of 2-Phenylpyridines

2.3 Direct ortho-Acylation of Benzoic Acids

3 Transformation of Potassium Aryl Trifluoroborates into Ketones, Esters, and Amides

3.1 Formation of Aryl Ketones from Potassium Aryl Trifluoroborates

3.2 Preparation of Aryl Amides and Esters from Potassium Aryl Trifluoroborates

3.3 Mechanistic Studies

4 Conclusions and Outlook