Solvent effects on the asymmetric Pauson-Khand-type reaction by rhodium |
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| Authors: | Yun Hee Choi |
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| Institution: | Department of Chemistry, Korea University, Seoul 136-701, Republic of Korea |
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| Abstract: | The reaction efficiency and enantioselectivity of an asymmetric Pauson-Khand-type reaction catalyzed by cationic rhodium are heavily dependent on the solvent. Coordinating solvents, such as THF, provide a faster reaction and better stereoselectivity than non-coordinating solvents, such as toluene. These beneficial effects can be attributed to a significant increase in the more reactive catalytic species of Rh(bisphosphane ligand)∗(solvent)n]+ (3) than of Rh(bisphosphine ligand)∗CO(solvent)]+(4) and Rh(bisphosphine ligand)∗(CO)2]+ (5) in a coordinating solvent. |
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| Keywords: | Pauson-Khand reaction Enantioselective Rhodium Chiral THF derivatives |
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