کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1323020 | 977260 | 2008 | 5 صفحه PDF | دانلود رایگان |
The preparation of a bimacrocyclic NHC palladium allyl complex 4 is described. The complex was obtained by transmetalation with allyl palladium chloride dimer from the NHC silver complex 2 in 85% yield. Complex 4 was fully characterized by spectroscopic methods and by single-crystal X-ray analysis. In a preliminary catalytic study, complex 4 showed high activity in the Suzuki–Miyaura cross-coupling of unactivated aryl chlorides and bromides with 1-naphthalene-boronic acid at low catalyst loading. Good results were also obtained in the Mizoroki–Heck reaction of aryl bromides with styrene, but a decrease in yield was observed when aryl chlorides were used.
The bimacrocylic NHC palladium allyl complex 4 was synthesized by transmetalation from NHC silver complex 2. Palladium complex 4 was characterized by single-crystal X-ray analysis and spectroscopic methods. The catalytic activity of 4 was proven in Mizoroki–Heck and Suzuki–Miyaura cross-coupling reactions.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 16, 1 August 2008, Pages 2784–2788