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Perry G, Schley ND. Bis(bicyclo[1.1.1]pentyl)chlorophosphine as a Precursor for the Preparation of Bis(bicyclo[1.1.1]pentyl)phosphines. Org Lett 2024; 26:6071-6075. [PMID: 38735051 PMCID: PMC11287751 DOI: 10.1021/acs.orglett.4c01190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/06/2024] [Accepted: 05/10/2024] [Indexed: 05/14/2024]
Abstract
Dialkylchlorophosphines are among the most versatile building blocks for tertiary phosphine ligands, but their synthesis relies on the nucleophilic substitution of PCl3, leaving substituents that require P-H precursors largely inaccessible. The primary phosphine reagent iPr2NPH2·BH3 can serve as a doubly protected PH2Cl proxy, enabling the synthesis of bis(bicyclo[1.1.1]pentyl)chlorophosphine (Bcp2PCl) for the first time. Bcp2PCl serves as a general reagent for the preparation of a family of bis(bicyclo[1.1.1]pentyl) alkyl- and arylphosphines, including new members of privileged phosphine ligand scaffolds.
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Affiliation(s)
- Griffin
L. Perry
- Department of Chemistry, Vanderbilt
University, Nashville, Tennessee 37235, United States
| | - Nathan D. Schley
- Department of Chemistry, Vanderbilt
University, Nashville, Tennessee 37235, United States
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2
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Moussa ME, Kahoun T, Marquardt C, Ackermann MT, Hegen O, Seidl M, Timoshkin AY, Virovets AV, Bodensteiner M, Scheer M. Three- and Five-Membered Anionic Chains of Pnictogenylboranes. Chemistry 2023; 29:e202203206. [PMID: 36478481 DOI: 10.1002/chem.202203206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 12/12/2022]
Abstract
An unprecedented family of three- and five-membered substituted anionic derivatives of parent pnictogenylboranes is herein reported. Reacting various combinations of the pnictogenylboranes H2 E'-BH2 -NMe3 (E'=P, As) with pnictogen-based nucleophiles MER1R2 (E=P, As; R1=H, R2=t Bu; R1=R2=Ph; M=Na, K) allows for the isolation of the unsymmetrical products [Na(18-crown-6)][H2 E'-BH2 -EHt Bu] (3: E=E'=P; 4: E=E'=As; 5: E=As, E'=P) and [M(C)][H2 E'-BH2 -EPh2 ] (7: E=E'=P, M=Na, C=18-crown-6; 8: E=E'=As; M=K, C=[2.2.2]cryptand; 9: E=P, E'=As, M=Na, C=[2.2.2]cryptand; 10: E=As, E'=P, M=K, C=[2.2.2]cryptand). [Na(18-crown-6)][H2 As-BH2 -t BuPH-BH3 ] (6) is only accessible by a different pathway, using t BuPH2 , BH3 ⋅ SMe2 and NaNH2 as starting materials. Additionally, the synthesis of symmetrical diphenyl-substituted compounds [M(18-crown-6)][Ph2 E-BH2 -EPh2 ] (11: E=P, M=Na; 12: E=As, M=K) is reported which can be regarded as isostructural inorganic, negatively charged analogs of dppm (1,1-bis(diphenylphosphino)methane) and dpam (1,1-bis(diphenylarsino)methane). Furthermore, an elongation of the pnictogen boron backbone in compounds 3, 7 and 9' (similar compound to 9, stabilized however by 18-crown-6), is attainable by reacting them with the pnictogenylboranes H2 E'-BH2 -NMe3 leading to corresponding five-membered chain-like compounds [Na(18-crown-6)][H2 E-BH2 -R1R2P-BH2 -E'H2 ] (E=E'=P, R1=H, R2=t Bu (13); E=E'=P, R1=R2=Ph (14); E=E'=As, R1=R2=Ph (15); E=P, E'=As, R1=R2=Ph (16)). Finally, the thermodynamics of the reaction pathways were evaluated by quantum chemical computations.
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Affiliation(s)
- Mehdi Elsayed Moussa
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Tobias Kahoun
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Christian Marquardt
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Matthias T Ackermann
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Oliver Hegen
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Michael Seidl
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Alexey Y Timoshkin
- Institute of Chemistry, St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia
| | - Alexander V Virovets
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Michael Bodensteiner
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
| | - Manfred Scheer
- Institut für Anorganische Chemie der, Universität Regensburg, 93040, Regensburg, Germany
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Race JJ, Heyam A, Wiebe MA, Diego-Garcia Hernandez J, Ellis CE, Lei S, Manners I, Weller AS. Polyphosphinoborane Block Copolymer Synthesis Using Catalytic Reversible Chain-Transfer Dehydropolymerization. Angew Chem Int Ed Engl 2023; 62:e202216106. [PMID: 36394131 PMCID: PMC10107156 DOI: 10.1002/anie.202216106] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/15/2022] [Accepted: 11/17/2022] [Indexed: 11/19/2022]
Abstract
An amphiphilic block copolymer of polyphosphinoborane has been prepared by a mechanism-led strategy of the sequential catalytic dehydropolymerization of precursor monomers, H3 B ⋅ PRH2 (R=Ph, n-hexyl), using the simple pre-catalyst [Rh(Ph2 PCH2 CH2 PPh2 )2 ]Cl. Speciation, mechanism and polymer chain growth studies support a step-growth process where reversible chain transfer occurs, i.e. H3 B ⋅ PRH2 /oligomer/polymer can all coordinate with, and be activated by, the catalyst. Block copolymer [H2 BPPhH]110 -b-[H2 BP(n-hexyl)H]11 can be synthesized and self-assembles in solution to form either rod-like micelles or vesicles depending on solvent polarity.
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Affiliation(s)
- James J Race
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.,Chemistry Research Laboratories, University of Oxford, Oxford, OX1 3TA, UK
| | - Alex Heyam
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Matthew A Wiebe
- Department of Chemistry, University of Victoria, Victoria, BC, V8P 5C2, Canada
| | | | - Charlotte E Ellis
- Department of Chemistry, University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Shixing Lei
- Department of Chemistry, University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Ian Manners
- Department of Chemistry, University of Victoria, Victoria, BC, V8P 5C2, Canada.,Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Andrew S Weller
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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Demirer T, Morgenstern B, Andrada DM. Synthesis, Structure, and Bonding Analysis of Lewis Base and Lewis Acid/Base‐Stabilized Phosphanylgallanes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200477] [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)
- T.Ilgin Demirer
- Saarland University: Universitat des Saarlandes Chemistry Department Campus C4.1 66123 Saarbrücken GERMANY
| | - Bernd Morgenstern
- Saarland University: Universitat des Saarlandes Chemistry Department Campus C4.1 66123 Saarbrücken GERMANY
| | - Diego Marcelo Andrada
- Universitat des Saarlandes Naturwissenschaftlich-Technische Fakultat Fachberei Chemie Campus C4.1 66123 Saarbrücken GERMANY
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Panova Y, Khristolyubova A, Zolotareva N, Sushev V, Galperin V, Rumyantcev R, Fukin G, Kornev A. Interaction of dicoordinate phosphorus with boranes: chemistry of 3a,6a-diaza-1,4-diphosphapentalene as masked phosphinidene. Dalton Trans 2021; 50:5890-5898. [PMID: 33949550 DOI: 10.1039/d1dt00747e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Treatment of 3a,6a-diaza-1,4-diphosphapentalene (DDP) with an excess of PhBCl2 yields the corresponding bis(borane) adduct DDP(PhBCl2)2 (14), demonstrating the availability of two lone pairs on the phosphorus center. The reaction between DDP and B(C6F5)3 yields (1 : 1) phosphino-borane complex 16. The free lone electron pair on the pyramidal P atom in 16 participates in the intramolecular non-covalent interactions P(1)F(1) and P(1)F(6) giving additional 3.9 and 2.8 kcal mol-1, respectively, for stabilization of the complex. This through-space interaction appears in the 31P NMR spectrum as large spin-spin coupling constants of 271 and 219 Hz. The addition of water to 16 (1 : 1) leads to the formation of the insertion product 17 having -H2P-O-B(C6F5)3 moiety. The reaction of DDP with BH3·SMe2 proceeds in several stages, which include the insertion of the masked phosphinidene into the B-H and P-H bonds of the intermediate compounds followed by the dehydrocoupling step and formation of diphosphine 18. The last compound exists in solution as a set of stereoisomers.
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Affiliation(s)
- Yulia Panova
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Alexandra Khristolyubova
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Natalia Zolotareva
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Vyacheslav Sushev
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Vadim Galperin
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Roman Rumyantcev
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Georgy Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
| | - Alexander Kornev
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Science 49 Tropinin str., 603137 Nizhny Novgorod, Russia.
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de Jong GB, Ortega N, Lutz M, Lammertsma K, Slootweg JC. Easy Access to Phosphine-Borane Building Blocks. Chemistry 2020; 26:15944-15952. [PMID: 32602582 PMCID: PMC7756754 DOI: 10.1002/chem.202002367] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/29/2020] [Indexed: 11/26/2022]
Abstract
In this paper, we highlight the synthesis of a variety of primary phosphine-boranes (RPH2 ⋅BH3 ) from the corresponding dichlorophosphines, simply by using Li[BH4 ] as reductant and provider of the BH3 protecting group. The method offers facile access not only to alkyl- and arylphosphine-boranes, but also to aminophosphine-boranes (R2 NPH2 ⋅BH3 ) that are convenient building blocks but without the protecting BH3 moiety thermally labile and notoriously difficult to handle. The borane-protected primary phosphines can be doubly deprotonated using n-butyllithium to provide soluble phosphanediides Li2 [RP⋅BH3 ] of which the phenyl-derivative Li2 [PhP⋅BH3 ] was structurally characterized in the solid state.
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Affiliation(s)
- G. Bas de Jong
- Van't Hoff Institute for Molecular Sciences (HIMS)University of AmsterdamP.O. Box 941571090 GDAmsterdamThe Netherlands
- Faculty of SciencesVrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
| | - Nuria Ortega
- Faculty of SciencesVrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
| | - Martin Lutz
- Crystal and Structural ChemistryBijvoet Centre for Biomolecular ResearchUtrecht UniversityPadualaan 83584UtrechtThe Netherlands
| | - Koop Lammertsma
- Faculty of SciencesVrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
- Department of ChemistryOakland Park 2006University of JohannesburgJohannesburg2006South Africa
| | - J. Chris Slootweg
- Van't Hoff Institute for Molecular Sciences (HIMS)University of AmsterdamP.O. Box 941571090 GDAmsterdamThe Netherlands
- Faculty of SciencesVrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdamThe Netherlands
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