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Qin P, Wang L, O'Connor JM, Baldridge KK, Li Y, Tufekci B, Chen J, Rheingold AL. Transition‐Metal Catalysis of Triene 6π Electrocyclization: The π‐Complexation Strategy Realized. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pengjin Qin
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
| | - Li‐An Wang
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
| | - Joseph M. O'Connor
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
| | - Kim K. Baldridge
- School of Pharmaceutical Science and Technology Tianjin University 92 Weijin Road, Nankai District Tianjin P. R. China
| | - Yifan Li
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
| | - Burak Tufekci
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
| | - Jiyue Chen
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry University of California, San Diego La Jolla CA 92093-0358 USA
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Qin P, Wang LA, O'Connor JM, Baldridge KK, Li Y, Tufekci B, Chen J, Rheingold AL. Transition-Metal Catalysis of Triene 6π Electrocyclization: The π-Complexation Strategy Realized. Angew Chem Int Ed Engl 2020; 59:17958-17965. [PMID: 32510720 DOI: 10.1002/anie.202006992] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Indexed: 01/14/2023]
Abstract
Triene 6π electrocyclization, wherein a conjugated triene undergoes a concerted stereospecific cycloisomerization to a cyclohexadiene, is a reaction of great historical and practical significance. In order to circumvent limitations imposed by the normally harsh reaction conditions, chemists have long sought to develop catalytic variants based upon the activating power of metal-alkene coordination. Herein, we demonstrate the first successful implementation of such a strategy by utilizing [(C5 H5 )Ru(NCMe)3 ]PF6 as a precatalyst for the disrotatory 6π electrocyclization of highly substituted trienes that are resistant to thermal cyclization. Mechanistic and computational studies implicate hexahapto transition-metal coordination as responsible for lowering the energetic barrier to ring closure. This work establishes a foundation for the development of new catalysts for stereoselective electrocyclizations.
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Affiliation(s)
- Pengjin Qin
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Li-An Wang
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Joseph M O'Connor
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Kim K Baldridge
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, P. R. China
| | - Yifan Li
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Burak Tufekci
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Jiyue Chen
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
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Curto SG, Esteruelas MA, Oliván M, Oñate E. Rhodium-Mediated Dehydrogenative Borylation–Hydroborylation of Bis(alkyl)alkynes: Intermediates and Mechanism. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00104] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Sheila G. Curto
- Departamento de Química Inorgánica−Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica−Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica−Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica−Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
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Guan D, Godard C, Polas SM, Tooze RP, Whitwood AC, Duckett SB. Using para hydrogen induced polarization to study steps in the hydroformylation reaction. Dalton Trans 2019; 48:2664-2675. [PMID: 30702728 DOI: 10.1039/c8dt04723e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A range of iridium complexes, Ir(η3-C3H5)(CO)(PR2R')2 (1a-1e) [where 1a, PR2R' = PPh3, 1b P(p-tol)3, 1c PMePh2, 1d PMe2Ph and 1e PMe3] were synthesized and their reactivity as stoichiometric hydroformylation precursors studied. Para-hydrogen assisted NMR spectroscopy detected the following intermediates: Ir(H)2(η3-C3H5)(CO)(PR2R') (2a-e), Ir(H)2(η1-C3H5)(CO)(PR2R')2 (4d-e), Ir(H)2(η1-C3H5)(CO)2(PR2R') (10a-e), Ir(H)2(CO-C3H5)(CO)2(PR2R') (11a-c), Ir(H)2(CO-C3H7)(CO)2(PR2R') (12a-c) and Ir(H)2(CO-C3H5)(CO)(PR2R')2 (13d-e). Some of these species exist as two geometric isomers according to their multinuclear NMR characteristics. The NMR studies suggest a role for the following 16 electron species in these reactions: Ir(η3-C3H5)(CO)(PR2R'), Ir(η1-C3H5)(CO)(PR2R')2, Ir(η1-C3H5)(CO)2(PR2R'), Ir(CO-C3H5)(CO)2(PR2R'), Ir(CO-C3H7)(CO)2(PR2R') and Ir(CO-C3H5)(CO)(PR2R')2. Their role is linked to several 18 electron species in order to confirm the route by which hydroformylation and hydrogenation proceeds.
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Affiliation(s)
- Dexin Guan
- School of Innovation and Entrepreneurship, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Provence, China 310023
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Synthesis, structure and thermolysis of cis-dialkylplatinum(II) complexes – Experimental and theoretical perceptions. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.05.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shibata Y, Kudo E, Sugiyama H, Uekusa H, Tanaka K. Facile Generation and Isolation of π-Allyl Complexes from Aliphatic Alkenes and an Electron-Deficient Rh(III) Complex: Key Intermediates of Allylic C–H Functionalization. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00143] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yu Shibata
- Department
of Applied Chemistry, and ‡Department of Chemistry and Material Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Eiji Kudo
- Department
of Applied Chemistry, and ‡Department of Chemistry and Material Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Haruki Sugiyama
- Department
of Applied Chemistry, and ‡Department of Chemistry and Material Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hidehiro Uekusa
- Department
of Applied Chemistry, and ‡Department of Chemistry and Material Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Ken Tanaka
- Department
of Applied Chemistry, and ‡Department of Chemistry and Material Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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Sivaramakrishna A, Sravani C, Venkatesh S, Pavankumar BB, Vijayakrishna K, Bhat HR, Jha PC, Smith GS. Theoretical and experimental investigations on stability and chemistry of organoiridium(iii) complexes. RSC Adv 2016. [DOI: 10.1039/c5ra27350a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel iridacyclononanes of the type {where L = PPh3, PEt3 and P(OMe)3} have been synthesized from their bis(1-pentenyl)iridium(iii) precursors through a ring-closing metathesis reaction using Grubbs' 1st generation catalyst.
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Affiliation(s)
| | - Chinduluri Sravani
- Department of Chemistry
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
| | - Sadhana Venkatesh
- Department of Chemistry
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
| | - B. B. Pavankumar
- Department of Chemistry
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
| | - Kari Vijayakrishna
- Department of Chemistry
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
| | - Haamid R. Bhat
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar
- India
| | - Prakash C. Jha
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar
- India
| | - Gregory S. Smith
- Department of Chemistry
- University of Cape Town
- Cape Town
- South Africa
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Sravani C, Venkatesh S, Vijayakrishna K, Sivaramakrishna A. Alkenyl complexes of platinum group metals: a platform for diverse reactivity patterns. Appl Organomet Chem 2014. [DOI: 10.1002/aoc.3179] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Chinduluri Sravani
- Chemistry Division, School of Advanced Sciences; VIT University; Vellore 632 014 Tamil Nadu India
| | - Sadhana Venkatesh
- Chemistry Division, School of Advanced Sciences; VIT University; Vellore 632 014 Tamil Nadu India
| | - Kari Vijayakrishna
- Chemistry Division, School of Advanced Sciences; VIT University; Vellore 632 014 Tamil Nadu India
| | - Akella Sivaramakrishna
- Chemistry Division, School of Advanced Sciences; VIT University; Vellore 632 014 Tamil Nadu India
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MacDougall TJ, Ferguson MJ, McDonald R, Cowie M. Diverse Coordination Modes and Transformations of Allenes at Adjacent Iridium/Osmium Centers. Organometallics 2012. [DOI: 10.1021/om300316h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Tiffany J. MacDougall
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Michael J. Ferguson
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Robert McDonald
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Martin Cowie
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
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Zhang R, Zhu L, Lu Z, Yan H, Bregadze VI. Reactivity of 16-electron half-sandwich cobalt compounds containing a chelating 1,2-dicarba-closo-dodecaborane-1,2-dithiolate ligand towards methyl propiolate and dithio ligands. Dalton Trans 2012; 41:12054-63. [DOI: 10.1039/c2dt31425h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sivaramakrishna A, Moss JR, Su H. Novel reactivity aspects of cis-bis(1-alkenyl)platinum(II) compounds of the type Pt(CH2(CH2)nCHCH2)2L2 (where L2=dppp, dppe, dppm and n=1, 2). Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.06.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zheng F, Sivaramakrishna A, Moss JR. Thermal decomposition studies of cis-bis(1-alkenyl)platinum(II) complexes. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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