Volume 53, Issue 26 pp. 6650-6654
Communication

Palladium-Catalyzed Oxidative Difunctionalization of Alkenes with α-Carbonyl Alkyl Bromides Initiated through a Heck-type Insertion: A Route to Indolin-2-ones

Jian-Hong Fan

Jian-Hong Fan

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082 (China)

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Wen-Ting Wei

Wen-Ting Wei

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082 (China)

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Ming-Bo Zhou

Ming-Bo Zhou

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082 (China)

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Dr. Ren-Jie Song

Dr. Ren-Jie Song

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082 (China)

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Prof. Dr. Jin-Heng Li

Corresponding Author

Prof. Dr. Jin-Heng Li

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082 (China)

State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000 (China)

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082 (China)Search for more papers by this author
First published: 21 May 2014
Citations: 166

We thank the Natural Science Foundation of China (21172060), the Specialized Research Fund for the Doctoral Program of Higher Education (20120161110041), and the Hunan Provincial Natural Science Foundation of China (13JJ2018) for financial support.

Graphical Abstract

Indolinone synthesis: A new palladium-catalyzed oxidative difunctionalization reaction of N-arylalkenes with primary, secondary, and tertiary α-carbonyl alkyl bromides proceeds through a radical process and provides indolin-2-ones in moderate to excellent yields. The reaction is initiated by a Heck insertion followed by interception of the σ-alkyl palladium(II) intermediate with aryl C(sp2)H bonds. dppe=1,2-bis(diphenylphosphino)ethane.

Abstract

The oxidative interception of various σ-alkyl palladium(II) intermediates with additional reagents for the difunctionalization of alkenes is an important research area. A new palladium-catalyzed oxidative difunctionalization reaction of alkenes with α-carbonyl alkyl bromides is described, in which the σ-alkyl palladium(II) intermediate is generated through a Heck insertion and trapped using an aryl C(sp2)H bond. This method can be applied to various α-carbonyl alkyl bromides, including primary, secondary, and tertiary α-bromoalkyl esters, ketones, and amides.

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