Rhodium(I)-Catalyzed [2+2+2+2] Cycloaddition of Diynes To Form Cyclooctatetraenes
- UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
- Mitchell Croatt, Assistant Professor (Creator)
- Institution
- The University of North Carolina at Greensboro (UNCG )
- Web Site: http://library.uncg.edu/
Abstract: Unique reactivity of a rhodium catalyst in the presence of many different Lewis basic additives was observed and studied. In the absence of additives, it was observed that a selective [2+2+2] reaction to form benzene products occurred; however, in the presence of an additive, optimally DMSO, the first rhodium(I)-catalyzed [2+2+2+2] reaction of alkynes occurred. A screen of different additives and catalysts was performed. Finally, a brief mechanistic study per-formed by using a ReactIR determined that DMSO coordinates to the catalyst, which affects the energetics of the reaction pathway. This appears primarily to raise the transition-state energy for the reductive elimination to form the benzene products.
Rhodium(I)-Catalyzed [2+2+2+2] Cycloaddition of Diynes To Form Cyclooctatetraenes
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Created on 2/5/2019
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Additional Information
- Publication
- European Journal of Organic Chemistry 2014, 2014, 3767-3772
- Language: English
- Date: 2014
- Keywords
- Organometallics, Cycloaddition, Alkynes, Nickel, Rhodium