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Copper- and Phosphine-Free Sonogashira Coupling Reaction Catalyzed by Polyurea-Encapsulated Palladi­um(II)

✍ Scribed by Yun-Yan Kuang; Fen-Er Chen

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
156 KB
Volume
92
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

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A polyurea‐encapsulated palladium catalyst (Pd EnCat^TM^ 30) was first applied to Sonogashira cross‐coupling reactions in the absence of a copper salt co‐catalyst and under phosphine‐free conditions. This polymer‐anchored homogeneous palladium catalyst efficiently catalyzed the Sonogashira reaction of various iodoarenes with terminal alkynes in H~2~O/MeCN, and good yields were obtained at 40° after 3–7 h in the presence of piperidine. Moreover, this catalyst maintains its efficiency through three recycle runs.

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