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Yoshifuji M. Low coordinate phosphorus compounds for 40 years in memory of the late professor François Mathey, Ecole Polytechnique. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2021.2011883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Masaaki Yoshifuji
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, USA
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Chemistry of Several Sterically Bulky Molecules with P=P, P=C, and C≡P Bond. Molecules 2022; 27:molecules27051557. [PMID: 35268657 PMCID: PMC8911619 DOI: 10.3390/molecules27051557] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/18/2022] [Accepted: 02/20/2022] [Indexed: 02/04/2023] Open
Abstract
Several sterically protected, low-coordinate organophosphorus compounds with P=P, P=C, and C≡P bond are described in this study. Molecules such as diphosphenes, phosphaalkenes, 1-phosphaallenes, 1,3-diphosphaallenes, 3,4-diphosphinidenecyclobutenes, and phosphaalkynes are stabilized with an extremely bulky 2,4,6-tri-t-butylphenyl (Mes*) group. The synthesis, structures, physical, and chemical properties of these molecules are discussed, together with some successful applications in catalytic organic reactions.
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Bevern D, Görls H, Krieck S, Westerhausen M. Synthesis, Structure, and Stability of Lithium Arylphosphanidyl‐diarylphosphane Oxide. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.201900327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Damian Bevern
- Friedrich Schiller University Jena Chair for Inorganic Chemistry 1 Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Friedrich Schiller University Jena Chair for Inorganic Chemistry 1 Humboldtstraße 8 07743 Jena Germany
| | - Sven Krieck
- Friedrich Schiller University Jena Chair for Inorganic Chemistry 1 Humboldtstraße 8 07743 Jena Germany
| | - Matthias Westerhausen
- Friedrich Schiller University Jena Chair for Inorganic Chemistry 1 Humboldtstraße 8 07743 Jena Germany
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4
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Shinozaki T, Rosas-Sánchez A, Hashizume D, Ito S. Incomplete Electrocyclization of a Sterically Hindered 1,4-Diphosphabutadiene. Chempluschem 2020; 84:1761-1766. [PMID: 31943877 DOI: 10.1002/cplu.201900632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 10/26/2019] [Indexed: 11/05/2022]
Abstract
Butadiene is the simplest neutral acyclic closed-shell π-conjugated system and is typically sufficiently stable enough to avoid electrocyclization to cyclobutene. In contrast, most congeners of butadiene containing heavier elements are easily converted into the corresponding 4-membered cyclobutene system. Herein, we demonstrate that the gauche 1,4-diphosphabutadiene (P=C-C=P) skeleton in a sterically encumbered 2,3-bis(phosphanylidene)-1,4-disilinane can be remarkably perturbed due to "incomplete electrocyclization" where P=C-C=P partially form the corresponding 1,2-dihydrodiphosphete (3,4-diphosphacyclobutene) by [2+2] electrocyclization. 31 P NMR data obtained in solution indicated that the coexistence of a closed ring substantially reduces the open-ring characteristics of the P=C-C=P moiety. However, the 31 P CP-MAS spectrum of 2,3-bis(phosphanylidene)-1,4-disilinane showed that the P=C-C=P structure is predominant in the solid-state. Single-crystal X-ray analysis revealed that decreasing the temperature promoted the generation of small amounts of incomplete 1,2-dihydrodiphosphete system in the crystalline state. Furthermore, the 1,2-dihydrodiphosphete units disappeared upon warming the single crystal, and this unique solid-state electrocyclization reaction was reversible.
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Affiliation(s)
- Tomokazu Shinozaki
- Department of Chemical Science and Engineering School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-H113, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Alfredo Rosas-Sánchez
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Daisuke Hashizume
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Shigekazu Ito
- Department of Chemical Science and Engineering School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-H113, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
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5
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Ito S. Topics of 1,3-diphosphacyclobutane-2,4-diyl derivatives: Structural aspects and functionality of isolable heavier congeners of cyclobutane-1,3-diyl and the related molecules. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.11.048] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Ito S, Shinozaki T, Mikami K. Stereoselective Catalytic Synthesis of Alkynylated Phosphaethenes Leading to Activation-Free Gold Catalysis. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701259] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Shigekazu Ito
- Department of Chemical Science and Engineering; School of Materials and Chemical Technology; Tokyo Institute of Technology; 2-12-1-H113 Ookayama 152-8552, Japan Meguro, Tokyo
| | - Tomokazu Shinozaki
- Department of Chemical Science and Engineering; School of Materials and Chemical Technology; Tokyo Institute of Technology; 2-12-1-H113 Ookayama 152-8552, Japan Meguro, Tokyo
| | - Koichi Mikami
- Department of Chemical Science and Engineering; School of Materials and Chemical Technology; Tokyo Institute of Technology; 2-12-1-H113 Ookayama 152-8552, Japan Meguro, Tokyo
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7
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Ito S. Study of the Air-Tolerant 1,3-Diphosphacyclobutane-2,4-diyl through the Direct Arylation. CHEM REC 2017; 18:445-458. [DOI: 10.1002/tcr.201700052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 11/02/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Shigekazu Ito
- Department of Chemical Science and Engineering, School of Material 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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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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9
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Ochiai T, Franz D, Wu XN, Irran E, Inoue S. A Tin Analogue of Carbenoid: Isolation and Reactivity of a Lithium Bis(imidazolin-2-imino)stannylenoid. Angew Chem Int Ed Engl 2016; 55:6983-7. [DOI: 10.1002/anie.201602178] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Tatsumi Ochiai
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Daniel Franz
- Department of Chemistry; Catalysis Research Center and Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstrasse 4 85748 Garching Germany
| | - Xiao-Nan Wu
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Elisabeth Irran
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Shigeyoshi Inoue
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
- Department of Chemistry; Catalysis Research Center and Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstrasse 4 85748 Garching Germany
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10
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Ochiai T, Franz D, Wu XN, Irran E, Inoue S. A Tin Analogue of Carbenoid: Isolation and Reactivity of a Lithium Bis(imidazolin-2-imino)stannylenoid. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602178] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tatsumi Ochiai
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Daniel Franz
- Department of Chemistry; Catalysis Research Center and Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstrasse 4 85748 Garching Germany
| | - Xiao-Nan Wu
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Elisabeth Irran
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Shigeyoshi Inoue
- Institut für Chemie; Anorganische Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
- Department of Chemistry; Catalysis Research Center and Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstrasse 4 85748 Garching Germany
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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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Ito S, Okabe S, Ueta Y, Mikami K. Formation of phosphanoxy-substituted phosphaalkenes via sterically promoted cleavage of the P=P diphosphene bond. Chem Commun (Camb) 2014; 50:9204-6. [PMID: 24995651 DOI: 10.1039/c4cc03274h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of a kinetically stabilized diphosphene (Mes*P=PMes*: Mes* = 2,4,6-tri-tert-butylphenyl) with an organolithium reagent and an acyl halide afforded the corresponding phosphanoxy-substituted phosphaethene [((phosphinidene)methoxy)phosphine] via sterically-promoted bond-cleavage of the P-P bond.
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Affiliation(s)
- Shigekazu Ito
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan.
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13
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Yoshifuji M, Ito S. Theoretical studies on the intramolecular cyclization of 2,4,6-t-Bu3C6H2P=C: and effects of conjugation between the P=C and aromatic moieties. Beilstein J Org Chem 2014; 10:1032-6. [PMID: 24991254 PMCID: PMC4077427 DOI: 10.3762/bjoc.10.103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 02/26/2014] [Indexed: 11/23/2022] Open
Abstract
The intramolecular C–H insertion of the Mes*-substituted phosphanylidenecarbene [Mes*P=C:] (Mes* = 2,4,6-t-Bu3C6H2) and physicochemical properties of the cyclized product, 6,8-di-tert-butyl-3,4-dihydro-4,4-dimethyl-1-phosphanaphthalene were studied based on ab initio calculations. Whereas the alternative Fritsch–Buttenberg–Wiechell-type rearrangement requires almost no activation energy, the intramolecular cyclization needs an activation energy of 12.3 kcal/mol at the MP2(full)/6-31G(d) condition. DFT calculations supported that the optimized structure of the cyclization product of Mes*P=C: suggests remarkable conjugation effects between the nearly coplanar P=C skeleton and the aryl moiety.
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Affiliation(s)
- Masaaki Yoshifuji
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Shigekazu Ito
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan ; Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan
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14
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Ito S, Nakagawa T, Mikami K. Stereoselective synthesis, structural aspects, and NMR properties of stable C-fluorinated phosphaalkenes. Chem Commun (Camb) 2013; 49:9221-3. [PMID: 23995514 DOI: 10.1039/c3cc45237a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a stereoselective route to synthesize (E)-2-bromo-2-fluoro-1-(2,4,6-tri-t-butylphenyl)-2-phosphaethene. Configurationally and conformationally controlled 2-fluoro-1-phosphaethene [Mes*P=C(F)H; Mes* = 2,4,6-tBu3C6H2] and 2-fluoro-1,3-diphosphapropene [Mes*P=C(F)-PPh2] were synthesized and the NMR data, including relaxation parameters, were collected.
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Affiliation(s)
- Shigekazu Ito
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan.
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Yoshifuji M, Ito S. Phosphorus Version of the Fritsch-Buttenberg-Wiechell Reaction. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2012.743144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Masaaki Yoshifuji
- a Department of Chemistry , Graduate School of Science, Tohoku University , Aoba , Sendai , Japan
| | - Shigekazu Ito
- b Department of Applied Chemistry , Graduate School of Science and Engineering , Tokyo
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Kocsor TG, Matioszek D, Nemeş G, Castel A, Escudié J, Petrar PM, Saffon N, Haiduc I. Chalcogeno[bis(phosphaalkenyl)] Germanium and Tin Compounds. Inorg Chem 2012; 51:7782-7. [DOI: 10.1021/ic300810q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tibor-Gabor Kocsor
- Université de Toulouse, UPS, CNRS, LHFA, UMR 5069, 118 Route de
Narbonne, F-31062 Toulouse cedex 09,
France
- Departamentul de
Chimie Anorganică,
Facultatea de Chimie şi Inginerie Chimică, Universitatea Babeş-Bolyai, Str. M. Kogălniceanu,
Nr: 1, RO-400084, Cluj-Napoca, Romania
| | - Dimitri Matioszek
- Université de Toulouse, UPS, CNRS, LHFA, UMR 5069, 118 Route de
Narbonne, F-31062 Toulouse cedex 09,
France
| | - Gabriela Nemeş
- Departamentul de
Chimie Anorganică,
Facultatea de Chimie şi Inginerie Chimică, Universitatea Babeş-Bolyai, Str. M. Kogălniceanu,
Nr: 1, RO-400084, Cluj-Napoca, Romania
| | - Annie Castel
- Université de Toulouse, UPS, CNRS, LHFA, UMR 5069, 118 Route de
Narbonne, F-31062 Toulouse cedex 09,
France
| | - Jean Escudié
- Université de Toulouse, UPS, CNRS, LHFA, UMR 5069, 118 Route de
Narbonne, F-31062 Toulouse cedex 09,
France
| | - Petronela M. Petrar
- Departamentul de
Chimie Anorganică,
Facultatea de Chimie şi Inginerie Chimică, Universitatea Babeş-Bolyai, Str. M. Kogălniceanu,
Nr: 1, RO-400084, Cluj-Napoca, Romania
| | - Nathalie Saffon
- Université de Toulouse, UPS, Service Commun Rayons X, ICT-FR2599,
118 Route de Narbonne, F-31062 Toulouse cedex 09, France
| | - Ionel Haiduc
- Departamentul de
Chimie Anorganică,
Facultatea de Chimie şi Inginerie Chimică, Universitatea Babeş-Bolyai, Str. M. Kogălniceanu,
Nr: 1, RO-400084, Cluj-Napoca, Romania
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Ito S. Synthesis and Properties of Highly Stable P-Heterocyclic Singlet Biradicals and Related Compounds. J SYN ORG CHEM JPN 2012. [DOI: 10.5059/yukigoseikyokaishi.70.731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ito S, Sugiyama H, Yoshifuji M. SYNTHESIS AND CHARACTERIZATION OF KINETICALLY STABILIZED 1,3-DIPHOSPHACYCLOBUTENE DERIVATIVES. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426500490427033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Ito S, Miyake H, Yoshifuji M. Study on Synthesis and Structure of Sterically Demanding 6-Phosphafulvenes. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500902718240] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Shigekazu Ito
- a Department of Chemistry, Graduate School of Science , Tohoku University , Aoba, Sendai, Japan
| | - Hideaki Miyake
- a Department of Chemistry, Graduate School of Science , Tohoku University , Aoba, Sendai, Japan
| | - Masaaki Yoshifuji
- a Department of Chemistry, Graduate School of Science , Tohoku University , Aoba, Sendai, Japan
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Ito S, Miura J, Morita N, Yoshifuji M, Arduengo AJ. Catenation of 1,3-Diphosphacyclobutane-2,4-diyl Units Having 2,4,6-Tri-tert-butylphenyl Protecting Groups and a P-sec-Butyl Group in the Ring. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200801265] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Septelean R, Nemes G, Escudié J, Silaghi-Dumitrescu I, Ranaivonjatovo H, Petrar P, Gornitzka H, Silaghi-Dumitrescu L, Saffon N. vic-Dichlorodiphosphapropenes - Synthesis and Coordination Ability. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200801034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Ito S, Miura J, Morita N, Yoshifuji M, Arduengo A. Poly(Biradicals): Oligomers of 1,3-Diphosphacyclobutane-2,4-diyl Units. Angew Chem Int Ed Engl 2008; 47:6418-21. [DOI: 10.1002/anie.200801461] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Ito S, Miura J, Morita N, Yoshifuji M, Arduengo A. Poly(Biradicals): Oligomers of 1,3-Diphosphacyclobutane-2,4-diyl Units. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801461] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cantat T, Jacques X, Ricard L, Le Goff X, Mézailles N, Le Floch P. From a Stable Dianion to a Stable Carbenoid. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701588] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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Cantat T, Jacques X, Ricard L, Le Goff XF, Mézailles N, Le Floch P. From a Stable Dianion to a Stable Carbenoid. Angew Chem Int Ed Engl 2007; 46:5947-50. [PMID: 17607672 DOI: 10.1002/anie.200701588] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thibault Cantat
- Laboratoire Hétéroéléments et Coordination, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cédex, Franc
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Ito S, Kikuchi M, Sugiyama H, Yoshifuji M. Synthesis and properties of air-stable 1,3-diphosphacyclobutane-2,4-diyls and the related compounds. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.10.066] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Preparation and X-ray analyses of siloxane-bridged acyclic and 8-membered cyclic phosphaethenes. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.04.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Septelean R, Ranaivonjatovo H, Nemes G, Escudié J, Silaghi-Dumitrescu I, Gornitzka H, Silaghi-Dumitrescu L, Massou S. Phosphavinylidene(oxo)phosphorane Mes*P(O)=C=PMes*: A Diphosphaallene Featuring λ5σ3- and λ3σ2-Phosphorus Atoms. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600384] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ito S, Miyake H, Yoshifuji M, Höltzl T, Veszprémi T. Synthesis of phosphorus ylides bearing a P-H bond from a kinetically stabilized 1,3,6-triphosphafulvene. Chemistry 2005; 11:5960-5. [PMID: 16052657 DOI: 10.1002/chem.200500374] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In mixing 2,4,6-tris(2,4,6-tri-tert-butylphenyl)-1,3,6-triphosphafulvene with alkyllithium compounds and acetic acid, both of nucleophilic alkylation and electrophilic protonation occurred at the exo sp2-phosphorus atoms to afford [2,4-bis(2,4,6-tri-tert-butylphenyl)-1,3-diphosphacyclopentadienylidene](alkyl)(2,4,6-tri-tert-butylphenyl)phosphoranes which are phosphorus ylides that bear a P-H bond. A phosphorus ylide bearing both P-H and P-F bonds was obtained by reaction of 2,4,6-tris(2,4,6-tri-tert-butylphenyl)-1,3,6-triphosphafulvene with hydrogen tetrafluoroborate, and the structure was determined by X-ray crystallography. Both P=C double bond and P(+)-C(-) zwitterionic character was indicated by the metric parameters. The isolated phosphorus ylide bearing a P-H bond, [2,4-bis(2,4,6-tri-tert-butylphenyl)-1,3-diphosphacyclopentadienylidene](2,4,6-tri-tert-butylphenyl)phosphorane, showed no isomerization by H-migration to the corresponding phosphinodiphospholes, probably due to the pi-accepting ability of the unsaturated PC bonds and aromaticity of the C3P2 ring. The ylide structure and aromaticity of 2,4-diphosphacyclopenta-2,4-dienylidenephosphorane was characterized by theoretical calculations. In addition, the regioselective protonation of the lithiated phosphinodiphospholes generated from the 1,3,6-triphosphafulvene is discussed.
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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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Yoshifuji M, Sugiyama H, Ito S. Syntheses and reactivity of novel unsaturated cyclic compounds containing phosphorus atoms. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2004.09.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cretiu Nemes G, Ranaivonjatovo H, Escudié J, Silaghi-Dumitrescu I, Silaghi-Dumitrescu L, Gornitzka H. A Surprisingly Stable 1-(Chlorosilyl)-2-phosphaethenyllithium Compound, RCl2SiC(Li)=PMes*. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400595] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ito S, Miyake H, Sugiyama H, Yoshifuji M. Preparation of 1,3-diphosphabuta-1,3-dienes from sterically encumbered phosphaalkyne and phosphaethenyllithium. HETEROATOM CHEMISTRY 2005. [DOI: 10.1002/hc.20104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ito S, Sekiguchi S, Yoshifuji M. Formation and Electrochemical Properties of a 1,4-Diphosphafulvene Including Formal Dimerization of Phosphaallene. J Org Chem 2004; 69:4181-4. [PMID: 15176846 DOI: 10.1021/jo0497407] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reactions of sterically protected 2-bromo-3-phenyl-1-phosphapropenes with bases such as tert-butyllithium and potassium tert-butoxide successfully afforded a bulky 1,4-diphosphafulvene (Mes = 2,4,6-tBu(3)C(6)H(2)) through a novel and formal dimerization pathway of 1-phosphaallene, together with small amounts of 3-phenyl-1-phosphaallene and 3,4-diphosphanylidenecyclobutene. The structure of the 1,4-diphosphafulvene was confirmed by X-ray crystallography indicating somewhat flattened phosphorus atoms due to the bulky Mes groups. The electrochemical properties of the 1,4-diphosphafulvene were investigated to show promising suitability as an electron donor, and indeed, it afforded a charge-transfer complex with TCNQ. Preparation and structural elucidation of an alkoxy-functionalized 1-phosphaallene was also performed, and the effect of the alkoxy group on the 1-phosphaallene moiety was characterized.
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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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Yoshifuji M, Ito S, Miyake H, Sugiyama H. Characterization of a 3,4-Dihydro-1,3,4- triphosphacyclopenta[a]indene as an Isomer of a Mes*-substituted 1,3,6- Triphosphafulvene (Mes* = 2,4,6- t-Bu3C6H2). HETEROCYCLES 2004. [DOI: 10.3987/com-04-10177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kimura S, Ito S, Yoshifuji M, Veszprémi T. Experimental and theoretical studies on the conjugation of the phosphorus-carbon double bond with a cyclopropyl group. J Org Chem 2003; 68:6820-3. [PMID: 12919058 DOI: 10.1021/jo034648g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
X-ray structural analysis for (Z)-2-cyclopropyl-1-(2,4,6-tri-tert-butylphenyl)-1-phosphaethene (2) was performed to confirm that the cyclopropyl group largely interacts with the P[double bond]C group compared with its carbon analogue, vinylcyclopropane (1). Absorption spectrum and redox properties of 2 were also studied to prove the conjugation. Theoretical investigation for nonsubstituted derivatives (4) indicated conjugative interaction between the P[double bond]C and cyclopropyl groups and revealed the physicochemical similarities between the P=C and C[double bond]C.
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Affiliation(s)
- Shigeo Kimura
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
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Ito S, Kimura S, Yoshifuji M. Preparation, structure, and reaction of a sterically encumbered 1-phosphaallene containing a cyclopropylidene moiety. Org Lett 2003; 5:1111-4. [PMID: 12659586 DOI: 10.1021/ol0341750] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Sterically protected (Z)-1-(2,4,6-tri-tert-butylphenyl)-2,5-dibromo-1-phosphapent-1-ene was allowed to react with potassium tert-butoxide to afford a cyclopropylidenephosphaethene, which was characterized spectroscopically and by X-ray crystallography. Construction of the cycloalkyl groups and isomerization of 1-phosphapenta-1,2,4-trienes to cyclopropylidenephosphaethenes are also described.
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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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