کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
65897 | 48408 | 2013 | 8 صفحه PDF | دانلود رایگان |
A novel polystyrene-supported palladium(II) dithizone complex is found to be a highly active catalyst for the Suzuki, Heck, and Sonogashira reactions of aryl halides in water. By this protocol, aryl halides, coupled with phenyl boronic acid (Suzuki reaction), alkenes (Heck reaction) or terminal alkyne (Sonogashira reaction), smoothly affords the corresponding cross-coupling products in good to excellent yields. Furthermore, the catalyst shows good thermal stability and recyclability. The catalyst was recycled for the Suzuki, Heck, and Sonogashira reactions for five runs without appreciable loss of its catalytic activity and negligible metal leaching.
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► Highly efficient heterogeneous catalyst for the Suzuki, Heck and Sonogashira reactions were prepared.
► The procedure is easy and does not require special precautions.
► [PS-dtz-Pd(II)] was fully characterized.
► The catalyst can be reused several times without a noticeable change in activity.
Journal: Journal of Molecular Catalysis A: Chemical - Volume 370, April 2013, Pages 152–159