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Segizbayev M, Tho Nguyen M, Gusev DG, Dmitrienko A, Pilkington M, van der Est A, Nikonov GI. A Guanidine-Supported π-Complex of Germanium Amenable to Intramolecular C-C Cleavage in Arene and Ge Atom Transfer. Chemistry 2023; 29:e202301981. [PMID: 37732936 DOI: 10.1002/chem.202301981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 09/22/2023]
Abstract
The germylone dimNHCGe (dimNHC=diimino N-heterocyclic carbene) reacts with azides N3 R (R=SiMe3 or p-tolyl) to furnish the first examples of germanium π-complexes, i. e. guanidine-ligated compounds (dimNHI-SiMe3 )Ge (NHI=N-heterocyclic imine, R=SiMe3 ) and (dimNHI-Tol)Ge (R=p-tolyl). DFT calculations suggest that these species are formed by a Staudinger type replacement of dinitrogen in the azide by a nucleophilic germylone, leading to a transient carbene adduct of iminogermylidene. Heating a solution of compound (dimNHI-SiMe3 )Ge to 70 °C results in extrusion of the iminogermylidene that further aggregates to produce the known [Me3 SiNGe]4 tetramer, whereas the imidazolylidene fragment transforms into an unusual heptatriene species that can be considered as a product of carbene insertion into the C-C bond of a pendant Ar substituent at the imidazolylidene nitrogen of the dimNHC. Reaction of (dimNHI-SiMe3 )Ge with tetrachloro-o-benzoquinone results in the net transfer of a germanium atom and formation of the free diimino-guanidine ligand. This ligand also forms when (dimNHI-SiMe3 )Ge is treated with azide N3 (p-Tol), with the germanium product being [(p-Tol)NGe]n.
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Affiliation(s)
- Medet Segizbayev
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Minh Tho Nguyen
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Dmitry G Gusev
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Ave W, Waterloo, Ontario N2 L 3 C5, Canada
| | - Anton Dmitrienko
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Melanie Pilkington
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Art van der Est
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Georgii I Nikonov
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
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Segizbayev M, Dmitrienko A, Simionescu R, Pilkington M, Nikonov GI. Germanium Analogue of the Parent Phosphine-Borane FLP Compound. Chem Asian J 2023; 18:e202300747. [PMID: 37739931 DOI: 10.1002/asia.202300747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/21/2023] [Accepted: 09/21/2023] [Indexed: 09/24/2023]
Abstract
Diimino-carbene-supported germylone dimNHCGe does not react with BPh3 and does not activate dihydrogen in the FLP mode in the combination with this borane. However, it reacts with B(C6 F5 )3 to give the zwitterionic borate dimNHCGe-(C6 F4 )BF(C6 F5 )2 . This compound can be converted into the hydroborate dimNHCGe-(C6 F4 )BH(C6 F5 )2 (8) and further into [dimNHCGe-(C6 F4 )B(C6 F5 )2 ]+ (4). Compound 4 is a Ge/B analogue of Stephan's FLP parent P/B compound (C6 H2 Me3 )2 P-C6 F4 -B(C6 F5 )2 but unlike the latter cannot split dihydrogen. Moreover, attempts to prepare a Ge/B analogue of the zwitterion (C6 H2 Me3 )2 HP-C6 F4 -BH(C6 F5 )2 by protonation of borate 8 resulted in immediate elimination of H2.
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Affiliation(s)
- Medet Segizbayev
- Chemistry Department, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Anton Dmitrienko
- Chemistry Department, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Razvan Simionescu
- Chemistry Department, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Melanie Pilkington
- Chemistry Department, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
| | - Georgii I Nikonov
- Chemistry Department, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, L2S 3A1, Canada
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Adilkhanova A, Frolova VF, Yessengazin A, Öztopçu Ö, Gudun KA, Segizbayev M, Matsokin NA, Dmitrienko A, Pilkington M, Khalimon AY. Synthesis and catalytic performance of nickel phosphinite pincer complexes in deoxygenative hydroboration of amides. Dalton Trans 2023; 52:2872-2886. [PMID: 36762562 DOI: 10.1039/d2dt03801c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A series of imino-POCNR, amino-POCNR2, and bis(phosphinite) POCOP pincer complexes of Ni(II) were prepared and tested in catalytic deoxygenative hydroboration of amides with HBPin to the corresponding amines. In contrast to the deoxygenative hydrosilylation approach, primarily developed for tertiary amides, superior reactivity in Ni-catalyzed deoxygenative hydroboration was demonstrated for secondary carboxamides. The bis(phosphinite) hydride complex (POCOP)NiH proved the most active in these reactions, tolerating potentially reducible functionalities such as internal alkenes, esters, nitriles, heteroaromatic compounds, and tertiary amides. Preferable hydroboration of secondary amides was also demonstrated in the presence of primary amide functionalities. The reactions were conducted at 60-80 °C, representing a rare example of a base-metal catalytic system for selective deoxygenation of secondary amides to the corresponding amines under mild conditions. In contrast to secondary amides, deoxygenative hydroboration of primary amides was demonstrated using an iminophosphinite pre-catalyst (POCNDmp)Ni(CH2TMS) (Dmp = 2,6-Me2C6H3). Deoxygenation reactions were suggested to proceed via a direct C-O bond cleavage mechanism, which is triggered by dehydrogenative N-borylation to access more electrophilic N-borylamides amenable to the addition of HBPin to the carbonyl group.
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Affiliation(s)
- Aziza Adilkhanova
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan. .,School of Mining and Geosciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan
| | - Valeriya F Frolova
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Azamat Yessengazin
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Özgür Öztopçu
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Kristina A Gudun
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Medet Segizbayev
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St Catharines, Ontario L2S 3A1, Canada
| | - Nikita A Matsokin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Anton Dmitrienko
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St Catharines, Ontario L2S 3A1, Canada.,Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
| | - Melanie Pilkington
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St Catharines, Ontario L2S 3A1, Canada
| | - Andrey Y Khalimon
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
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Gudun KA, Zakarina R, Segizbayev M, Hayrapetyan D, Slamova A, Khalimon AY. Cobalt‐Catalyzed Deoxygenative Hydroboration of Nitro Compounds and Applications to One‐Pot Synthesis of Aldimines and Amides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kristina A. Gudun
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Raikhan Zakarina
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Medet Segizbayev
- Department of Chemistry Brock University 1812 Sir Isaac Brock Way St. Catharines Niagara Region L2S 3A1 ON Canada
| | - Davit Hayrapetyan
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Ainur Slamova
- Core Facilities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Andrey Y. Khalimon
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
- The Environment and Resource Efficiency Cluster (EREC) Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
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Segizbayev M, Öztopçu Ö, Hayrapetyan D, Shakhman D, Lyssenko KA, Khalimon AY. Transfer hydrogenation of aldehydes and ketones catalyzed using an aminophosphinite POCNH pincer complex of Ni(ii). Dalton Trans 2020; 49:11950-11957. [DOI: 10.1039/d0dt02264k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(POCNH)NiBr catalyzes the transfer hydrogenation of aldehydes and ketones in iPrOH. The reactions tolerate alkenes, esters, amides, nitriles, and heterocycles and proceed via the metal–ligand cooperative mechanism through (POCN)NiII species.
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Affiliation(s)
- Medet Segizbayev
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Özgür Öztopçu
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Davit Hayrapetyan
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Dinmukhamed Shakhman
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Konstantin A. Lyssenko
- Department of Chemistry
- Lomonosov Moscow State University
- Moscow 119991
- Russia
- Plekhanov Russian University of Economics
| | - Andrey Y. Khalimon
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
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Nurseiit A, Janabel J, Gudun KA, Kassymbek A, Segizbayev M, Seilkhanov TM, Khalimon AY. Bench-Stable Cobalt Pre-Catalysts for Mild Hydrosilative Reduction of Tertiary Amides to Amines and Beyond. ChemCatChem 2019. [DOI: 10.1002/cctc.201801605] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Alibek Nurseiit
- Department of Chemistry; School of Science and Technology, Nazarbayev University; 53 Kabanbay Batyr Avenue Astana 010000 Kazakhstan
| | - Jaysan Janabel
- Department of Chemistry; School of Science and Technology, Nazarbayev University; 53 Kabanbay Batyr Avenue Astana 010000 Kazakhstan
| | - Kristina A. Gudun
- Department of Chemistry; School of Science and Technology, Nazarbayev University; 53 Kabanbay Batyr Avenue Astana 010000 Kazakhstan
| | - Aishabibi Kassymbek
- Department of Chemistry; School of Science and Technology, Nazarbayev University; 53 Kabanbay Batyr Avenue Astana 010000 Kazakhstan
| | - Medet Segizbayev
- Department of Chemistry; School of Science and Technology, Nazarbayev University; 53 Kabanbay Batyr Avenue Astana 010000 Kazakhstan
| | - Tulegen M. Seilkhanov
- Laboratory of Engineering Profile NMR Spectroscopy; Sh. Ualikhanov Kokshetau State University; 76 Abay Street Kokshetau 020000 Kazakhstan
| | - Andrey Y. Khalimon
- Department of Chemistry; School of Science and Technology, Nazarbayev University; 53 Kabanbay Batyr Avenue Astana 010000 Kazakhstan
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Gudun KA, Segizbayev M, Adamov A, Plessow PN, Lyssenko KA, Balanay MP, Khalimon AY. POCN Ni(ii) pincer complexes: synthesis, characterization and evaluation of catalytic hydrosilylation and hydroboration activities. Dalton Trans 2019; 48:1732-1746. [DOI: 10.1039/c8dt04854a] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(POCN)Ni(ii) complexes were found to mediate a variety of carbonyl hydroboration reactions, including chemoselective hydroboration of benzaldehyde and hydroborative reduction of amides.
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Affiliation(s)
- Kristina A. Gudun
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Medet Segizbayev
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Assyl Adamov
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Philipp N. Plessow
- Institute of Catalysis Research and Technology (IKFT)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - Konstantin A. Lyssenko
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- Moscow 119991
- Russia
- Plekhanov Russian University of Economics
| | - Mannix P. Balanay
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Andrey Y. Khalimon
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
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