1
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Walsgrove HTG, Patrick BO, Gates DP. Transition Metal-Induced Cyclization of 1-Phosphabutadienes: Selective Formation of 1-Phosphet-2-ene or P═C-Substituted Phosphacyclohexene Ligands. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Henry T. G. Walsgrove
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Derek P. Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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2
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Walsgrove HT, Dabringhaus P, Patrick BO, Gates DP. Chemical- and light-induced isomerization of the P=C bond of a 1-phosphabutadiene. CAN J CHEM 2020. [DOI: 10.1139/cjc-2020-0055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Treatment of Mes*P=C(Si(CH3)3)Br with CH2=CHMgBr in the presence of Pd(0) affords 1-phosphabutadiene Mes*P=C(Si(CH3)3)–CH=CH2 (1) selectively as the Z isomer. Remarkably, treatment of Z-1 with n-BuLi (0.1 equiv.) resulted in quantitative formation of E-1. The exact role of the n-BuLi is unknown; however, it appears to be required to promote the isomerization in the absence of light. The isomerization of Z-1 to E-1 was also mediated by sunlight with the reaction mixture consisting of a ca. 1:9 ratio of Z-1 to E-1. DFT calculations were consistent with the thermodynamic favorability of the isomerization of Z-1 to E-1.
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Affiliation(s)
- Henry T.G. Walsgrove
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Philipp Dabringhaus
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Derek P. Gates
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
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3
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Ohtsuki K, Walsgrove HTG, Hayashi Y, Kawauchi S, Patrick BO, Gates DP, Ito S. Diels-Alder reactions of 1-phosphabutadienes: a highly selective route to P[double bond, length as m-dash]C-substituted phosphacyclohexenes. Chem Commun (Camb) 2020; 56:774-777. [PMID: 31845681 DOI: 10.1039/c9cc08997g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Kinetically stabilized 1-phosphahaloprenes (2-halo-1-phosphabutadienes) as well as 1-phosphaisoprene undergo a hitherto unknown phospha-Diels-Alder dimerization of the P[double bond, length as m-dash]C-C[double bond, length as m-dash]C units upon heating. The [4+2] cyclodimerization is highly stereo- and regio-selective. The phosphaalkene-substituted phosphacyclohexene product is an unprecedented P(sp2),P(sp3) ligand that is of interest in polymer/materials science and catalysis.
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Affiliation(s)
- Kazuaki Ohtsuki
- School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-H113 Ookayama, Meguro, Tokyo 152-8552, Japan.
| | - Henry T G Walsgrove
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Yoshihiro Hayashi
- School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-H113 Ookayama, Meguro, Tokyo 152-8552, Japan.
| | - Susumu Kawauchi
- School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-H113 Ookayama, Meguro, Tokyo 152-8552, Japan.
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Derek P Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Shigekazu Ito
- School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-H113 Ookayama, Meguro, Tokyo 152-8552, Japan.
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4
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Zhang C, Hou G, Zi G, Ding W, Walter MD. An Alkali-Metal Halide-Bridged Actinide Phosphinidiide Complex. Inorg Chem 2019; 58:1571-1590. [DOI: 10.1021/acs.inorgchem.8b03091] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Congcong Zhang
- Department of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guohua Hou
- Department of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guofu Zi
- Department of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Wanjian Ding
- Department of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Marc D. Walter
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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5
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Dück K, Rawe BW, Scott MR, Gates DP. Polymerization of 1-Phosphaisoprene: Synthesis and Characterization of a Chemically Functional Phosphorus Version of Natural Rubber. Angew Chem Int Ed Engl 2017; 56:9507-9511. [DOI: 10.1002/anie.201703590] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 05/23/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Klaus Dück
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Benjamin W. Rawe
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Michael R. Scott
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Derek P. Gates
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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6
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Dück K, Rawe BW, Scott MR, Gates DP. Polymerization of 1-Phosphaisoprene: Synthesis and Characterization of a Chemically Functional Phosphorus Version of Natural Rubber. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703590] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Klaus Dück
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Benjamin W. Rawe
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Michael R. Scott
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Derek P. Gates
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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7
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Ito S, Shinozaki T, Mikami K. Palladium-Catalyzed Arylation of a Sterically Demanding gem-Dibromophosphaethene. ChemistrySelect 2016. [DOI: 10.1002/slct.201601105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shigekazu Ito
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology; Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro; Tokyo 152-8552 Japan
| | - Tomokazu Shinozaki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology; Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro; Tokyo 152-8552 Japan
| | - Koichi Mikami
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology; Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro; Tokyo 152-8552 Japan
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8
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Shameem MA, Esfandiarfard K, Öberg E, Ott S, Orthaber A. Direct, Sequential, and Stereoselective Alkynylation of C,C-Dibromophosphaalkenes. Chemistry 2016; 22:10614-9. [PMID: 27310813 DOI: 10.1002/chem.201601955] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Indexed: 01/07/2023]
Abstract
The first direct alkynylation of C,C-dibromophosphaalkenes by a reaction with sulfonylacetylenes is reported. Alkynylation proceeds selectively in the trans position relative to the P substituent to afford bromoethynylphosphaalkenes. Owing to the absence of transition metals in the procedure, the previously observed conversion of dibromophosphaalkenes into phosphaalkynes through the phosphorus analog of the Fritsch-Buttenberg-Wiechell rearrangement is thus suppressed. The bromoethynylphosphaalkenes can subsequently be converted to C,C-diacetylenic, cross-conjugated phosphaalkenes by following a Sonogashira coupling protocol in good overall yields. By using the newly described method, full control over the stereochemistry at the P=C double bond is achieved. The substrate scope of this reaction is demonstrated for different dibromophosphaalkenes as well as different sulfonylacetylenes.
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Affiliation(s)
- Muhammad A Shameem
- Department of Chemistry - Ångström Laboratories, Molecular Inorganic Chemistry, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Keyhan Esfandiarfard
- Department of Chemistry - Ångström Laboratories, Molecular Inorganic Chemistry, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Elisabet Öberg
- Department of Chemistry - Ångström Laboratories, Molecular Inorganic Chemistry, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Sascha Ott
- Department of Chemistry - Ångström Laboratories, Molecular Inorganic Chemistry, Uppsala University, Box 523, 75120, Uppsala, Sweden.
| | - Andreas Orthaber
- Department of Chemistry - Ångström Laboratories, Molecular Inorganic Chemistry, Uppsala University, Box 523, 75120, Uppsala, Sweden.
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9
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Esfandiarfard K, Arkhypchuk AI, Orthaber A, Ott S. Synthesis of the first metal-free phosphanylphosphonate and its use in the “phospha–Wittig–Horner” reaction. Dalton Trans 2016; 45:2201-7. [DOI: 10.1039/c5dt03686k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The synthesis of the first phophanylphosphonate, Mes*PH–PO(OEt)2 (2-H), in which the P(iii) centre is not coordinated by a metal fragment is reported.
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Affiliation(s)
| | - Anna I. Arkhypchuk
- Department of Chemistry-Ångström Laboratories
- Uppsala University
- Uppsala
- Sweden
| | - Andreas Orthaber
- Department of Chemistry-Ångström Laboratories
- Uppsala University
- Uppsala
- Sweden
| | - Sascha Ott
- Department of Chemistry-Ångström Laboratories
- Uppsala University
- Uppsala
- Sweden
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10
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Esfandiarfard K, Ott S, Orthaber A. Synthesis of 2,6-Dimesitylphenyl-C,C-Dibromophosphaalkene. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.984030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Keyhan Esfandiarfard
- Department of Chemistry-Ångström Laboratories. Uppsala University. BOX 523, Uppsala, 75120, Sweden
| | - Sascha Ott
- Department of Chemistry-Ångström Laboratories. Uppsala University. BOX 523, Uppsala, 75120, Sweden
| | - Andreas Orthaber
- Department of Chemistry-Ångström Laboratories. Uppsala University. BOX 523, Uppsala, 75120, Sweden
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11
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Yoshifuji M, Ito S. Studies on Intramolecular Cyclization of 2,4,6-Tri- Tert-Butylphenyl–P=C:In Memory of Professor Dr. Friedrich Bickelhaupt, Scheikundig Laboratorium, Vrije Universiteit, Amsterdam. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.974753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Masaaki Yoshifuji
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama, USA
| | - Shigekazu Ito
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro, Tokyo, Japan
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12
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Öberg E, Orthaber A, Lescop C, Réau R, Hissler M, Ott S. Phosphorus centers of different hybridization in phosphaalkene-substituted phospholes. Chemistry 2014; 20:8421-32. [PMID: 24890504 PMCID: PMC4506554 DOI: 10.1002/chem.201402406] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Indexed: 11/10/2022]
Abstract
Phosphole-substituted phosphaalkenes (PPAs) of the general formula Mes*P=C(CH(3))-(C(4)H(2)P(Ph))-R 5 a-c (Mes*=2,4,6-tBu(3)Ph; R=2-pyridyl (a), 2-thienyl (b), phenyl (c)) have been prepared from octa-1,7-diyne-substituted phosphaalkenes by utilizing the Fagan-Nugent route. The presence of two differently hybridized phosphorus centers (σ(2) ,λ(3) and σ(3) ,λ(3)) in 5 offers the possibility to selectively tune the HOMO-LUMO gap of the compounds by utilizing the different reactivity of the two phosphorus heteroatoms. Oxidation of 5 a-c by sulfur proceeds exclusively at the σ(3) ,λ(3) -phosphorus atom, thus giving rise to the corresponding thioxophospholes 6 a-c. Similarly, 5 a is selectively coordinated by AuCl at the σ(3),λ(3) -phosphorus atom. Subsequent second AuCl coordination at the σ(2),λ(3) -phosphorus heteroatom results in a dimetallic species that is characterized by a gold-gold interaction that provokes a change in π conjugation. Spectroscopic, electrochemical, and theoretical investigations show that the phosphaalkene and the phosphole both have a sizable impact on the electronic properties of the compounds. The presence of the phosphaalkene unit induces a decrease of the HOMO-LUMO gap relative to reference phosphole-containing π systems that lack a P=C substituent.
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Affiliation(s)
- Elisabet Öberg
- Department of Chemistry, Ångström Laboratories, Uppsala UniversityBox 523, 75120 Uppsala (Sweden), Fax: (+46) 18-471-6844 E-mail:
| | - Andreas Orthaber
- Department of Chemistry, Ångström Laboratories, Uppsala UniversityBox 523, 75120 Uppsala (Sweden), Fax: (+46) 18-471-6844 E-mail:
| | - Christophe Lescop
- Institut des Sciences Chimiques de Rennes, UMR6226, CNRS-Université de Rennes 1Campus de Beaulieu, 35042 Rennes Cedex (France) E-mail:
| | - Régis Réau
- Institut des Sciences Chimiques de Rennes, UMR6226, CNRS-Université de Rennes 1Campus de Beaulieu, 35042 Rennes Cedex (France) E-mail:
| | - Muriel Hissler
- Institut des Sciences Chimiques de Rennes, UMR6226, CNRS-Université de Rennes 1Campus de Beaulieu, 35042 Rennes Cedex (France) E-mail:
| | - Sascha Ott
- Department of Chemistry, Ångström Laboratories, Uppsala UniversityBox 523, 75120 Uppsala (Sweden), Fax: (+46) 18-471-6844 E-mail:
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13
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Öberg E, Orthaber A, Santoni MP, Howard F, Ott S. Toward Metathesis Reactions on Vinylphosphaalkenes. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2012.743145] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Elisabet Öberg
- a Department of Chemistry , Ångström Laboratories, Uppsala University, Box 523 , 75120 , Uppsala , Sweden E-mail:
| | - Andreas Orthaber
- a Department of Chemistry , Ångström Laboratories, Uppsala University, Box 523 , 75120 , Uppsala , Sweden E-mail:
| | - Marie-Pierre Santoni
- a Department of Chemistry , Ångström Laboratories, Uppsala University, Box 523 , 75120 , Uppsala , Sweden E-mail:
| | - Fredrick Howard
- a Department of Chemistry , Ångström Laboratories, Uppsala University, Box 523 , 75120 , Uppsala , Sweden E-mail:
| | - Sascha Ott
- a Department of Chemistry , Ångström Laboratories, Uppsala University, Box 523 , 75120 , Uppsala , Sweden E-mail:
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14
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Oberg E, Geng XL, Santoni MP, Ott S. C,C-diacetylenic phosphaalkenes in palladium-catalyzed cross-coupling reactions. Org Biomol Chem 2011; 9:6246-55. [PMID: 21792460 DOI: 10.1039/c1ob05705g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of bis-TMS-substituted C,C-diacetylenic phosphaalkene (A(2)PA) 1 in Sonogashira-Hagihara cross-coupling reactions has been examined. The selective and successive deprotection of the two silyl groups in 1 is enabled by the steric bulk of the Mes* group which renders the acetylene trans to Mes* more reactive and thereby facilitates selective and consecutive couplings with iodoarenes. In situ transformation of the TMS-protected acetylenes into Cu(i)acetylides is the key step in the synthetic sequence and enables the preparation of the first dimeric A(2)PA linked by a phenylene spacer. cis-trans Isomerization across the P[double bond, length as m-dash]C bond is triggered by a tertiary amine and exclusively observed in the case of nitrophenyl-substituted A(2)PAs. The introduced aryl groups are integral parts of the entire π-system as evidenced by spectroscopic and electrochemical studies.
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Affiliation(s)
- Elisabet Oberg
- Department of Photochemistry and Molecular Science, Ångström Laboratories, Uppsala University, Uppsala, Sweden
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15
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Fischer RC, Power PP. π-Bonding and the Lone Pair Effect in Multiple Bonds Involving Heavier Main Group Elements: Developments in the New Millennium. Chem Rev 2010; 110:3877-923. [DOI: 10.1021/cr100133q] [Citation(s) in RCA: 894] [Impact Index Per Article: 63.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Roland C. Fischer
- Technische Universität Graz, Stremayrgasse 16/IV, A-8010, Graz, Austria, and University of California, Department of Chemistry, One Shields Avenue, Davis, California 95616
| | - Philip P. Power
- Technische Universität Graz, Stremayrgasse 16/IV, A-8010, Graz, Austria, and University of California, Department of Chemistry, One Shields Avenue, Davis, California 95616
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16
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Schäfer B, Öberg E, Kritikos M, Ott S. Incorporating Phosphaalkenes into Oligoacetylenes. Angew Chem Int Ed Engl 2008; 47:8228-31. [DOI: 10.1002/anie.200802253] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Schäfer B, Öberg E, Kritikos M, Ott S. Incorporating Phosphaalkenes into Oligoacetylenes. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802253] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Nagahora N, Sasamori T, Tokitoh N. A Ferrocenyldiphosphene−Platinum Complex: Structural Features and Theoretical Calculations. Organometallics 2008. [DOI: 10.1021/om800315q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Noriyoshi Nagahora
- Institute for Chemical Research and Institute of Sustainability Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Takahiro Sasamori
- Institute for Chemical Research and Institute of Sustainability Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Norihiro Tokitoh
- Institute for Chemical Research and Institute of Sustainability Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
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Yam M, Chong JH, Tsang CW, Patrick BO, Lam AE, Gates DP. Scope and Limitations of the Base-Catalyzed Phospha-Peterson PC Bond-Forming Reaction. Inorg Chem 2006; 45:5225-34. [PMID: 16780348 DOI: 10.1021/ic060236p] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phosphaalkenes (MesP=CRR': R = R' = Ph (1a); R = R' = 4-FC6H4 (1b); R = Ph, R' = 4-FC6H4 (1c); R = R' = 4-OMeC6H4 (1d); R = Ph, R' = 4-OMeC6H4 (1e); R = Ph, R' = 2-pyridyl (1f)) are prepared from the reaction of MesP(SiMe3)2 and O=CRR' in the presence of a trace of KOH or NaOH. The base-catalyzed phospha-Peterson reaction is quantitated by NMR spectroscopy, and isolated yields of phosphaalkene between 40 and 70% are obtained after vacuum distillation and/or recrystallization. The asymmetrically substituted phosphaalkenes (1c, 1e, 1f) form as 1:1 mixtures of E and Z isomers; however, X-ray crystallography reveals that the E isomers crystallize preferentially. Interestingly, E-1e and E-1f readily isomerize in solution in the dark, although the rate of isomerization is much faster when samples are exposed to light. X-ray crystal structures of 1b, E-1e, and E-1f reveal that the P=C bond lengths (average of 1.70 A) are in the long end of the range typically found in phosphaalkenes (1.61-1.71 A). Attempts to prepare isolable P-adamantyl phosphaalkenes following this route were unsuccessful. Although AdP=CPh2 (2a) is detected by 31P NMR spectroscopy, attempts to isolate this species afforded the 1,2-diphosphetane (AdPCPh2)2 (3a), which was characterized by X-ray crystallography.
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Affiliation(s)
- Mandy Yam
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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20
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Ito S, Nishide K, Yoshifuji M. Structural and Coordination Properties of 3,3-Diphenyl-1- (2,4,6-tri-tert-butylphenyl)-2-(trimethylsilyl)-1,3-diphosphapropene Derivatives Showing Interesting Conformational Features. Organometallics 2006. [DOI: 10.1021/om050972l] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shigekazu Ito
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Katsunori Nishide
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Masaaki Yoshifuji
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
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21
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Ito S, Jin H, Kimura S, Yoshifuji M. Synthesis, Structure, and Reactivity of Novel 3,4-Diphosphacyclobutenes Bearing Silyl Groups. J Org Chem 2005; 70:3537-41. [PMID: 15844988 DOI: 10.1021/jo050195z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Copper-mediated homocoupling of sterically hindered 2-(2,4,6-tri-tert-butylphenyl)-1-trialkylsilyl-2-phosphaethenyllithiums afforded 1,2-bis(trialkylsilyl)-3,4-diphosphacyclobutenes (1,2-dihydrodiphosphetenes) through a formal electrocyclic [2+2] cyclization in the P=C-C=P skeleton as well as 2-trimethylsilyl-1,4-diphosphabuta-1,3-diene. Reduction of 1,2-bis(trimethylsilyl)-3,4-diphosphacyclobutenes followed by quenching with electrophiles afforded ring-opened products, (E)-1,2-bis(phosphino)-1,2-bis(trimethylsilyl)ethene and (Z)-2,3-bis(trimethylsilyl)-1,4-diphosphabut-1-ene. The structures of the ring-opened products indicated E/Z isomerization around the C=C bond after P-P bond cleavage of 5, and the isomerization of the P-C=C skeleton. Ring opening of 1,2-bis(trimethylsilyl)-3,4-diphosphacyclobutenes affording (E,E)- and (Z,Z)-1,4-diphosphabuta-1,3-dienes was observed upon desilylation.
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Affiliation(s)
- Shigekazu Ito
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
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Heinicke J, Steinhauser K, Peulecke N, Spannenberg A, Mayer P, Karaghiosoff K. Metalated 1,3-Azaphospholes: Structure and Reactivity of 2-Lithio-1-methyl-1,3-benzazaphosphole, an Isolable −PC(Li)−NR Heterocycle. Organometallics 2002. [DOI: 10.1021/om010884a] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joachim Heinicke
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany, Institut für Organische Katalyseforschung an der Universität Rostock e.V., D-18055 Rostock, Germany, and Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany
| | - Kinga Steinhauser
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany, Institut für Organische Katalyseforschung an der Universität Rostock e.V., D-18055 Rostock, Germany, and Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany
| | - Normen Peulecke
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany, Institut für Organische Katalyseforschung an der Universität Rostock e.V., D-18055 Rostock, Germany, and Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany
| | - Anke Spannenberg
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany, Institut für Organische Katalyseforschung an der Universität Rostock e.V., D-18055 Rostock, Germany, and Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany
| | - Peter Mayer
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany, Institut für Organische Katalyseforschung an der Universität Rostock e.V., D-18055 Rostock, Germany, and Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany
| | - Konstantin Karaghiosoff
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald, Germany, Institut für Organische Katalyseforschung an der Universität Rostock e.V., D-18055 Rostock, Germany, and Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany
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van der Sluis M, Beverwijk V, Termaten A, Bickelhaupt F, Kooijman H, Spek AL. Synthesis of Novel Phosphaalkene-Based Bidentate Ligands Mes*PCH(3-R-Ar) (R = Pyridyl, Carbaldimino) and Formation of Three-Membered Palladacycles Mes*(Me)P−CH(3-R-Ar)−PdCl by Carbapalladation of the PC Double Bond. Organometallics 1999. [DOI: 10.1021/om980913q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marcel van der Sluis
- Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Vincent Beverwijk
- Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Arjan Termaten
- Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Friedrich Bickelhaupt
- Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Huub Kooijman
- Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Anthony L. Spek
- Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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