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101
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Desai SP, Ye J, Zheng J, Ferrandon MS, Webber TE, Platero-Prats AE, Duan J, Garcia-Holley P, Camaioni DM, Chapman KW, Delferro M, Farha OK, Fulton JL, Gagliardi L, Lercher JA, Penn RL, Stein A, Lu CC. Well-Defined Rhodium-Gallium Catalytic Sites in a Metal-Organic Framework: Promoter-Controlled Selectivity in Alkyne Semihydrogenation to E-Alkenes. J Am Chem Soc 2018; 140:15309-15318. [PMID: 30352506 DOI: 10.1021/jacs.8b08550] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Promoters are ubiquitous in industrial heterogeneous catalysts. The wider roles of promoters in accelerating catalysis and/or controlling selectivity are, however, not well understood. A model system has been developed where a heterobimetallic active site comprising an active metal (Rh) and a promoter ion (Ga) is preassembled and delivered onto a metal-organic framework (MOF) support, NU-1000. The Rh-Ga sites in NU-1000 selectively catalyze the hydrogenation of acyclic alkynes to E-alkenes. The overall stereoselectivity is complementary to the well-known Lindlar's catalyst, which generates Z-alkenes. The role of the Ga in promoting this unusual selectivity is evidenced by the lack of semihydrogenation selectivity when Ga is absent and only Rh is present in the active site.
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Affiliation(s)
| | | | - Jian Zheng
- Institute for Integrated Catalysis, and Fundamental and Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | | | | | - Ana E Platero-Prats
- Department of Inorganic Chemistry , Universidad Autónoma de Madrid , Madrid 28049 , Spain
| | | | - Paula Garcia-Holley
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
| | - Donald M Camaioni
- Institute for Integrated Catalysis, and Fundamental and Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Karena W Chapman
- Department of Chemistry , Stony Brook University, Stony Brook , New York 11790 , United States
| | | | - Omar K Farha
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
| | - John L Fulton
- Institute for Integrated Catalysis, and Fundamental and Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | | | - Johannes A Lercher
- Institute for Integrated Catalysis, and Fundamental and Computational Science Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States.,Department of Chemistry and Catalysis Research Institute , Technische Universität München , Garching 85748 , Germany
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102
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Collins LR, van Gastel M, Neese F, Fürstner A. Enhanced Electrophilicity of Heterobimetallic Bi–Rh Paddlewheel Carbene Complexes: A Combined Experimental, Spectroscopic, and Computational Study. J Am Chem Soc 2018; 140:13042-13055. [DOI: 10.1021/jacs.8b08384] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Lee R. Collins
- Max-Planck-Institut für Kohlenforschung, Mülheim/Ruhr 45470, Germany
| | | | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, Mülheim/Ruhr 45470, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, Mülheim/Ruhr 45470, Germany
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103
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Rajpurohit J, Kumar P, Shukla P, Shanmugam M, Shanmugam M. Mechanistic Investigation of Well-Defined Cobalt Catalyzed Formal E-Selective Hydrophosphination of Alkynes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00281] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jitendrasingh Rajpurohit
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, Maharashtra, India
| | - Pardeep Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, Maharashtra, India
| | - Pragya Shukla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, Maharashtra, India
| | - Muralidharan Shanmugam
- Manchester Institute of Biotechnology (MIB), The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K
| | - Maheswaran Shanmugam
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, Maharashtra, India
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104
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Mo X, Letort A, Roşca DA, Higashida K, Fürstner A. Site-Selectivetrans-Hydrostannation of 1,3- and 1,n-Diynes: Application to the Total Synthesis of Typhonosides E and F, and a Fluorinated Cerebroside Analogue. Chemistry 2018; 24:9667-9674. [DOI: 10.1002/chem.201801344] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaobin Mo
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Aurélien Letort
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | | | - Kosuke Higashida
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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105
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Ripka B, Eills J, Kouřilová H, Leutzsch M, Levitt MH, Münnemann K. Hyperpolarized fumarate via parahydrogen. Chem Commun (Camb) 2018; 54:12246-12249. [DOI: 10.1039/c8cc06636a] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We produce hyperpolarized [1-13C]fumarate in the proton nuclear spin singlet state by pairwise trans-addition of parahydrogen to a molecular precursor using a ruthenium-based catalyst in water.
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Affiliation(s)
- Barbara Ripka
- Max Planck Institute for Polymer Research
- Mainz
- Germany
| | | | | | - Markus Leutzsch
- Department of Chemical Engineering and Biotechnology
- University of Cambridge
- Cambridge
- UK
| | | | - Kerstin Münnemann
- Max Planck Institute for Polymer Research
- Mainz
- Germany
- Technical University of Kaiserslautern
- Kaiserslautern
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106
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Pierce BM, Simpson BF, Ferguson KH, Whittaker RE. Phosphine-mediated partial reduction of alkynes to form both (E)- and (Z)-alkenes. Org Biomol Chem 2018; 16:6659-6662. [DOI: 10.1039/c8ob01848k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild, tunable method to form both (E)- and (Z)-alkenes from alkynes is reported using PPh3 as a reductant.
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