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Geer AM, Julián A, López JA, Ciriano MA, Tejel C. Pseudo-tetrahedral Rhodium and Iridium Complexes: Catalytic Synthesis of E-Enynes. Chemistry 2018; 24:17545-17556. [PMID: 30207408 DOI: 10.1002/chem.201803878] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Indexed: 01/04/2023]
Abstract
The reactions of the rhodium(I) and iridium(I) complexes [M(PhBP3 )(C2 H4 )(NCMe)] (PhBP3 =PhB(CH2 PPh2 )3 - ) with alkynes have resulted in the synthesis of a new family of pseudo-tetrahedral complexes, [M(PhBP3 )(RC≡CR')] (M=Rh, Ir), which contain the alkyne as a four-electron donor. The reactions of these unusual compounds with two-electron donors (L=PMe3 , CNtBu) produced a change in the "donicity" of the alkyne from a 4e- to a 2e- donor to give five-coordinate complexes. These were the final products with the iridium complexes, whereas further reactions took place with the rhodium complexes. In particular, C(sp)-H bond activation of the alkyne occurred leading to hydrido alkynyl complexes. This process is essential for the further reactivity of the alkynes, and if the alkyne itself was used as reagent, E-enyne complexes were obtained. As a consequence of this chemistry, we show that the complex [Rh(PhBP3 )(C2 H4 )(NCMe)] is a very efficient pre-catalyst for the regioselective di- and trimerization of terminal alkynes to E-enynes and benzene derivatives, respectively. Interestingly, acetonitrile significantly enhanced the catalytic activity by facilitating the C(sp)-H bond activation step. A hydrometalation mechanism to account for these experimental observations is proposed.
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Affiliation(s)
- Ana M Geer
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Alejandro Julián
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
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Geer AM, Julián A, López JA, Ciriano MA, Tejel C. Pseudotetrahedral Rhodium(I) Complexes. Chemistry 2014; 20:2732-6. [DOI: 10.1002/chem.201304569] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Indexed: 11/06/2022]
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Dalton DM, Oberg KM, Yu RT, Lee EE, Perreault S, Oinen ME, Pease ML, Malik G, Rovis T. Enantioselective rhodium-catalyzed [2 + 2 + 2] cycloadditions of terminal alkynes and alkenyl isocyanates: mechanistic insights lead to a unified model that rationalizes product selectivity. J Am Chem Soc 2009; 131:15717-28. [PMID: 19817441 PMCID: PMC2796191 DOI: 10.1021/ja905065j] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This manuscript describes the development and scope of the asymmetric rhodium-catalyzed [2 + 2 + 2] cycloaddition of terminal alkynes and alkenyl isocyanates leading to the formation of indolizidine and quinolizidine scaffolds. The use of phosphoramidite ligands proved crucial for avoiding competitive terminal alkyne dimerization. Both aliphatic and aromatic terminal alkynes participate well, with product selectivity a function of both the steric and electronic character of the alkyne. Manipulation of the phosphoramidite ligand leads to tuning of enantio- and product selectivity, with a complete turnover in product selectivity seen with aliphatic alkynes when moving from Taddol-based to biphenol-based phosphoramidites. Terminal and 1,1-disubstituted olefins are tolerated with nearly equal efficacy. Examination of a series of competition experiments in combination with analysis of reaction outcome shed considerable light on the operative catalytic cycle. Through a detailed study of a series of X-ray structures of rhodium(cod)chloride/phosphoramidite complexes, we have formulated a mechanistic hypothesis that rationalizes the observed product selectivity.
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Affiliation(s)
- Derek M. Dalton
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Kevin M. Oberg
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Robert T. Yu
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Ernest E. Lee
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Stéphane Perreault
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Mark Emil Oinen
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Melissa L. Pease
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Guillaume Malik
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Tomislav Rovis
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
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Cho CW, Skucas E, Krische MJ. Contrasteric Regiocontrol in Rhodium-Catalyzed Hydrogenative Couplings of Nonsymmetric 1,3-Diynes to Ethyl Glyoxalate. Organometallics 2007. [DOI: 10.1021/om7003089] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chang-Woo Cho
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, and Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea
| | - Eduardas Skucas
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, and Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea
| | - Michael J. Krische
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, and Department of Chemistry, Kyungpook National University, Daegu 702-701, Korea
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Wu HP, Weakley TJR, Haley MM. Metallabenzenes and Valence Isomers. 5. Synthesis and Structural Characterization of a Rhodabenzvalene: A Rare η2-Cyclopropene/σ-Vinylrhodium(I) Complex. Organometallics 2002. [DOI: 10.1021/om020634+] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Burke JM, Benjamin Coapes R, Goeta AE, Howard JA, Marder TB, Robins EG, Westcott SA. Synthesis, characterisation and molecular structure of [Rh(COE)2(acac)] (COE=cyclooctene, η2-C8H14), an important starting material for the preparation of rhodium catalyst precursors. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01123-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bühl M, Håkansson M, Mahmoudkhani AH, Öhrström L. X-ray Structures and DFT Calculations on Rhodium−Olefin Complexes: Comments on the 103Rh NMR Shift−Stability Correlation. Organometallics 2000. [DOI: 10.1021/om000419y] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Bühl
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany, Department of Inorganic Chemistry, Chalmers Tekniska Högskola, SE-412 96 Gothenburg, Sweden, and Department of Chemistry, Gothenburg University, SE-412 96 Gothenburg, Sweden
| | - Mikael Håkansson
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany, Department of Inorganic Chemistry, Chalmers Tekniska Högskola, SE-412 96 Gothenburg, Sweden, and Department of Chemistry, Gothenburg University, SE-412 96 Gothenburg, Sweden
| | - Amir H. Mahmoudkhani
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany, Department of Inorganic Chemistry, Chalmers Tekniska Högskola, SE-412 96 Gothenburg, Sweden, and Department of Chemistry, Gothenburg University, SE-412 96 Gothenburg, Sweden
| | - Lars Öhrström
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany, Department of Inorganic Chemistry, Chalmers Tekniska Högskola, SE-412 96 Gothenburg, Sweden, and Department of Chemistry, Gothenburg University, SE-412 96 Gothenburg, Sweden
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Barnes JC, Hunter G, Keller W, Paton JD, Weissensteiner W. Two different crystal and molecular structures for dicarbonyl(?2-cis-cyclooctene)[?6-1,3,5-triethyl-2,4,6-tris-(trimethylsilylmethyl)-benzene]molybdenum(0): a highly crowded but surprisingly stable molecule. MONATSHEFTE FUR CHEMIE 1992. [DOI: 10.1007/bf00817600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Brown JM, Hall SA. Comparison of cationic rhodium and iridium complexes in directed homogeneous hydrogenation. Tetrahedron 1985. [DOI: 10.1016/s0040-4020(01)82359-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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