Synlett 2014; 25(20): 2938-2942
DOI: 10.1055/s-0034-1379483
letter
© Georg Thieme Verlag Stuttgart · New York

Cyanation of Unactivated Aryl Chlorides and Aryl Mesylates Catalyzed by Palladium and Hemilabile MOP-Type Ligands

Yahui Tu
a   School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. of China
,
Yi Zhang
b   School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. of China   Fax: +86(21)54748925   Email: xiaominxie@sjtu.edu.cn
,
Sheng Xu*
a   School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. of China
,
Zhaoguo Zhang
b   School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. of China   Fax: +86(21)54748925   Email: xiaominxie@sjtu.edu.cn
,
Xiaomin Xie*
b   School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. of China   Fax: +86(21)54748925   Email: xiaominxie@sjtu.edu.cn
› Author Affiliations
Further Information

Publication History

Received: 09 July 2014

Accepted after revision: 28 September 2014

Publication Date:
21 October 2014 (online)


Abstract

Palladium-catalyzed cyanation of aryl halides and pseudo halides with potassium hexacyanoferrate is described employing the hemilabile, bulky, and electron-rich MOP-type ligands. When the mixture of t-BuOH and H2O was used as the solvent and K2CO3 as the base, the MOP-type ligands showed high efficiency for the palladium-catalyzed cyanation. The effect of ligand structure was studied in detail, and 2-di-tert-butylphosphino-2′-isopropoxy-1,1′-binaphthyl was the more effective for the cyanation. The catalyst system allows the cyanation of unactivated aryl chlorides, and even aryl mesylates to occur in good yields. Furthermore, the reactivity of different arylated reagents in the catalytic system was found to be: ArBr > ArCl >> ArOMs > ArOSO2Im > ArOSO2NMe2.

Supporting Information