Investigation on the Coordination Mode of IL‐Supported Diols Used as Phosphine‐Free Ligands for Palladium Catalyzed Heck Reaction. Issue 10 (16th September 2013)

• Record Type: Journal Article
• Authors: Cai, Yueqin; Song, Gonghua; Chen, Xiao
• Is Part Of: Chinese journal of chemistry. Volume 31:Issue 10(2013:Oct.)
• Page Start: 1250
• Page End: 1256
• Publication Date: 2013-09-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201300461
• Languages: English
• ISSNs: 1001-604X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The coordination mode of IL‐supported diols used as phosphine‐free ligands for palladium catalyzed Heck reaction has been investigated by tuning their compositions. The difference in coordination of these IL‐supported diols with metal Pd in Heck reaction was related to the changes of the cation rings, leading to the different activities of Pd catalyst in the reaction. The experimental results indicated that the activities of Pd catalyst were affected mainly by π‐electron density of the cation rings. Compared to pyridinium and piperidinium cations, imidazolium cations showed the best coordination to metal Pd. In the meantime, C‐2 hydrogen and the length of alkyl side chains had impacts on the coordination as well.</p> </abstract>