1
|
Sar S, Ghorai P. Umpolung Chemo- and Regioselective Cascade Addition of Diethylzinc to α-Diketones Followed by Intramolecular Michael Reaction: Stereoselective Synthesis of Highly Substituted 1- Indanones. Org Lett 2022; 24:6576-6581. [PMID: 36069566 DOI: 10.1021/acs.orglett.2c02539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we report an efficient stereoselective umpolung 1,2-addition of Et2Zn onto α-diketones followed by intramolecular cascade Michael cyclization. This strategy effectively delivers a broad range of substituted 1-indanones in excellent yields in a chemo- and regioselective fashion. Additionally, we performed a variety of synthetic transformations on the 1-indanone products. Furthermore, a hitherto-unexplored asymmetric variant of this methodology that provides up to 94:6 er using an easily accessible cinchona alkaloid ligand has been addressed.
Collapse
Affiliation(s)
- Suman Sar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal-462066, India
| |
Collapse
|
2
|
Fukuda K, Harada T, Iwasawa N, Takaya J. Facile Synthesis and Utilization of Bis(o-phosphinophenyl)zinc as Isolable PZnP-pincer Ligands Enabled by Boron-Zinc Double Transmetallation. Dalton Trans 2022; 51:7035-7039. [DOI: 10.1039/d2dt01222g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis(o-phosphinophenyl)zinc derivatives were successfully synthesized by the reaction of o-phosphinophenylboronates with dimethylzinc via boron-zinc double transmetallation. The transmetallation was significantly accelerated by the presence of the ortho PR2 substituent to...
Collapse
|
3
|
Tulewicz A, Szejko V, Justyniak I, Wolska M, Lewinski J. Exploring the reactivity of homoleptic organozincs towards SO 2: Synthesis and structure of a homologous series of organozinc sulfinates. Dalton Trans 2022; 51:7241-7247. [DOI: 10.1039/d2dt00577h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studies on the reactivity of zinc alkyl compounds towards SO2 are relatively less explored than either the oxygenation or hydrolysis reactions. We report on environmentally friendly and efficient syntheses of...
Collapse
|
4
|
Budny-Godlewski K, Leszczyński MK, Tulewicz A, Justyniak I, Pinkowicz D, Sieklucka B, Kruczała K, Sojka Z, Lewiński J. A Case Study on the Desired Selectivity in Solid-State Mechano- and Slow-Chemistry, Melt, and Solution Methodologies. CHEMSUSCHEM 2021; 14:3887-3894. [PMID: 34289248 DOI: 10.1002/cssc.202101269] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Solution-based syntheses are omnipresent in chemistry but are often associated with obvious disadvantages, and the search for new mild and green synthetic methods continues to be a hot topic. Here, comparative studies in four different reaction media were conducted, that is, the solid-state mechano- and slow-chemistry synthesis, melted phase, and solution protocols, and the impact of the employed solvent-free solid-state versus liquid-phase synthetic approaches was highlighted on a pool of products. A moderately exothermic model reaction system was chosen based on bis(pentafluorophenyl)zinc, (C6 F5 )2 Zn, and 2,2,6,6-tetramethylpiperidinyl oxide (TEMPO) as a stable nitroxyl radical, anticipating that these reagents may offer a unique landscape for addressing kinetic and thermodynamic aspects of wet and solvent-free solid-state processes. In a toluene solution two distinct paramagnetic Lewis acid-base adducts (C6 F5 )2 Zn(η1 -TEMPO) (1) and (C6 F5 )2 Zn(η1 -TEMPO)2 (2) equilibrated, but only 2 was affordable by crystallization. In turn, crystallization from the melt was the only method yielding single crystals of 1. Moreover, the solid-state approaches were stoichiometry sensitive and allowed for the selective synthesis of both adducts by simple stoichiometric control over the substrates. Density functional theory (DFT) calculations were carried out to examine selected structural and thermodynamic features of the adducts 1 and 2. Compound 2 is a unique non-redox active metal complex supported by two nitroxide radicals, and the magnetic studies revealed weak-to-moderate intramolecular antiferromagnetic interactions between the two coordinated TEMPO molecules.
Collapse
Affiliation(s)
- Krzysztof Budny-Godlewski
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Michał K Leszczyński
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Adam Tulewicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Dawid Pinkowicz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland
| | - Krzysztof Kruczała
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland
| | - Zbigniew Sojka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland
| | - Janusz Lewiński
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warsaw, Poland
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| |
Collapse
|
5
|
Budny-Godlewski K, Justyniak I, Leszczyński MK, Lewiński J. Mechanochemical and slow-chemistry radical transformations: a case of diorganozinc compounds and TEMPO. Chem Sci 2019; 10:7149-7155. [PMID: 31588281 PMCID: PMC6686643 DOI: 10.1039/c9sc01396b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/16/2019] [Indexed: 12/14/2022] Open
Abstract
From the green chemistry perspective, molecular solid-state transformations conducted under mild conditions are of great interest and desirability. However, research in this area lacked popularity in the previous century, and thus progressed slowly. In particular, the application of radical reactions in solid-state chemistry has been hampered by several long-standing challenges that are intrinsically associated with the apparent unpredictable nature of radical chemistry. We present a comparative study of model mechanochemical, slow-chemistry and solution radical reactions between TEMPO and homoleptic organozinc compounds (i.e., di-tert-butylzinc and diphenylzinc). In the case of the tBu2Zn/TEMPO reaction system only a dimeric diamagnetic complex [tBuZn(μ-TEMPO*)]2 is obtained in yields slightly varying with the method chosen. In contrast, when TEMPO is mixed with diphenylzinc in a 2 : 1 molar ratio a novel paramagnetic Lewis acid-base adduct [[Ph2Zn(η1-TEMPO)]·TEMPO] is isolated in high yields regardless of the applied methodology. This adduct is also formed in the slow-chemistry process when TEMPO is gently mixed with Ph2Zn in a 1 : 1 molar ratio and left for two weeks at ambient temperature. Within the next week the reaction mixture gives in high yield a diamagnetic dinuclear compound [PhZn(μ-TEMPO*)][PhZn(μ2-η1:η1-TEMPO*)] and biphenyl. The analogous reaction conducted in toluene results in a much lower conversion rate. The reported results open up a new horizon in molecular solid-state radical transformations.
Collapse
Affiliation(s)
- Krzysztof Budny-Godlewski
- Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
| | - Iwona Justyniak
- Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Michał K Leszczyński
- Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Janusz Lewiński
- Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
- Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| |
Collapse
|
6
|
Pietrzak T, Justyniak I, Park JV, Terlecki M, Kapuśniak Ł, Lewiński J. Reaching Milestones in the Oxygenation Chemistry of Magnesium Alkyls: towards Intimate States of O
2
Activation and the First Monomeric Well‐Defined Magnesium Alkylperoxide. Chemistry 2019; 25:2503-2510. [DOI: 10.1002/chem.201805180] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/04/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Tomasz Pietrzak
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | - Iwona Justyniak
- Institute of Physical ChemistryPolish Academy of Science Kasprzaka 44/52 01-224 Warsaw Poland
| | - Jiwon Victoria Park
- Department of ChemistryMassachusetts Institute of Technology 77 Massachusetts Avenue Cambridge Massachusetts 02139 USA
| | - Michał Terlecki
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | - Łukasz Kapuśniak
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | - Janusz Lewiński
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
- Institute of Physical ChemistryPolish Academy of Science Kasprzaka 44/52 01-224 Warsaw Poland
| |
Collapse
|
7
|
Folkertsma E, Benthem SH, Jastrzebski JTBH, Lutz M, Moret M, Klein Gebbink RJM. 1,2-Addition of Diethylzinc to a Bis(Imidazolyl)ketone Ligand. Eur J Inorg Chem 2018; 2018:1167-1175. [PMID: 29937689 PMCID: PMC5993287 DOI: 10.1002/ejic.201701363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Indexed: 11/10/2022]
Abstract
In this study, the selective 1,2-addition of diethylzinc to the ketone functionality of BMdiPhIK [bis(1-methyl-4,5-diphenylimidazolyl)ketone] is shown. The reaction product is isolated in a dimeric form with a planar Zn2(µ-O)2-motif keeping the two monomers together. This compound can serve as a model for reactive intermediates in the catalytic alkylation of ketones with diorganozinc reagents. Hydrolysis of this binuclear zinc compound leads to isolation of the C-alkylated product in 89 % yield. A reaction pathway is proposed in which BMdiPhIK initially coordinates to diethylzinc as a bidentate bis(nitrogen) ligand. This is followed by the homolytic cleavage of the Zn-Et bond and in-cage recombination of the Et-radical and the Zn-coordinated ligand-centered radical, which is mainly localized on the carbonyl moiety of the ligand.
Collapse
Affiliation(s)
- Emma Folkertsma
- Organic Chemistry & CatalysisDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Sanne H. Benthem
- Organic Chemistry & CatalysisDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Johann T. B. H. Jastrzebski
- Organic Chemistry & CatalysisDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Martin Lutz
- Crystal and Structural ChemistryBijvoet Center for Biomolecular ResearchUtrecht UniversityPadualaan 83584 CHUtrechtThe Netherlands
| | - Marc‐Etienne Moret
- Organic Chemistry & CatalysisDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Robertus J. M. Klein Gebbink
- Organic Chemistry & CatalysisDebye Institute for Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| |
Collapse
|
8
|
Cao LL, Bamford KL, Liu LL, Stephan DW. Zinc-Containing Radical Anions via Single Electron Transfer to Donor-Acceptor Adducts. Chemistry 2018; 24:3980-3983. [DOI: 10.1002/chem.201800607] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Levy L. Cao
- Department of Chemistry; University of Toronto; 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Karlee L. Bamford
- Department of Chemistry; University of Toronto; 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Liu Leo Liu
- Department of Chemistry; University of Toronto; 80 St. George St. Toronto Ontario M5S3H6 Canada
| | - Douglas W. Stephan
- Department of Chemistry; University of Toronto; 80 St. George St. Toronto Ontario M5S3H6 Canada
| |
Collapse
|
9
|
Leszczyński MK, Justyniak I, Lewiński J. Toward Factors Affecting the Degree of Zinc Alkyls Oxygenation: A Case of Organozinc Guanidinate Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00287] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michał K. Leszczyński
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Iwona Justyniak
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Lewiński
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Department
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| |
Collapse
|
10
|
Wróbel Z, Pietrzak T, Justyniak I, Lewiński J. Oxygenation of RZn(N,O)-type complexes as an efficient route to zinc alkoxides not accessible via the classical alcoholysis path. Chem Commun (Camb) 2017; 53:10808-10811. [DOI: 10.1039/c7cc05818g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxygenation of alkylzincs incorporating a 2-ester substituted pyrrolate ligand (L) leads to zinc alkoxides with an uncommon structural motif in the solid state: a trimer [(L)Zn(μ-OtBu)]3 with the central [Zn3(μ-OR)3] ring or a heterocubane [(L)Zn(μ3-OEt)]4.
Collapse
Affiliation(s)
- Zbigniew Wróbel
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Kasprzaka 44/52
- Warsaw 01-224
- Poland
| | - Tomasz Pietrzak
- Department of Chemistry, Warsaw University of Technology, Noakowskiego 3
- Warsaw 00-664
- Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Kasprzaka 44/52
- Warsaw 01-224
- Poland
| | - Janusz Lewiński
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Kasprzaka 44/52
- Warsaw 01-224
- Poland
| |
Collapse
|
11
|
Theoretical investigation of the reaction of dialkylzincs with α-alkoxycarbonyl radicals. Evaluation of α-bromoacrylates as radical acceptors in radical-polar crossover processes. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
12
|
Kubisiak M, Zelga K, Bury W, Justyniak I, Budny-Godlewski K, Ochal Z, Lewiński J. Development of zinc alkyl/air systems as radical initiators for organic reactions. Chem Sci 2015; 6:3102-3108. [PMID: 28706684 PMCID: PMC5490337 DOI: 10.1039/c5sc00600g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 03/19/2015] [Indexed: 12/21/2022] Open
Abstract
This paper reports a series of comparative experiments on the activity of carbon- and oxygen-centred radical species in a model reaction of the radical addition of THF to imines mediated by a series of zinc alkyl/air reaction systems. The study strongly contradicts the notion that generally R˙ radicals are the initiating species in organic reactions mediated by R n M/air systems, and simultaneously demonstrates that oxygen-centred radical species are the key intermediates responsible for the initiation process. In addition, a new efficient RZn(L)/air initiating system for radical organic reactions exampled by a model reaction of radical addition of THF to imines is developed. Moreover, the isolation and structural characterization of the first zinc alkylperoxide supported by a carboxylate ligand, [Zn4(μ3-OOtBu)3(μ4-O)(O2CEt)3]2, as well as the novel octanuclear zinc oxo(alkoxide) aggregate with entrapped O-THF species, [Zn4(μ4-O)(μ3-2-O-THF)(O2CEt)5]2, provide clear mechanistic signatures for the mode of function of the RZn(O2CR')/air system.
Collapse
Affiliation(s)
- Marcin Kubisiak
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
| | - Karolina Zelga
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
| | - Wojciech Bury
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
| | - Iwona Justyniak
- Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland . ; Tel: +48 22 3432076
| | - Krzysztof Budny-Godlewski
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
| | - Zbigniew Ochal
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
| | - Janusz Lewiński
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland . ; ; Tel: +48 22 2347315
- Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland . ; Tel: +48 22 3432076
| |
Collapse
|
13
|
Mąkolski Ł, Zelga K, Petrus R, Kubicki D, Zarzycki P, Sobota P, Lewiński J. Probing the Role of π Interactions in the Reactivity of Oxygen Species: A Case of Ethylzinc Aryloxides with Different Dispositions of Aromatic Rings toward the Metal Center. Chemistry 2014; 20:14790-9. [DOI: 10.1002/chem.201403851] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Indexed: 11/11/2022]
|
14
|
Budny-Godlewski K, Kubicki D, Justyniak I, Lewiński J. A New Look at the Reactivity of TEMPO toward Diethylzinc. Organometallics 2014. [DOI: 10.1021/om5008117] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Dominik Kubicki
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Iwona Justyniak
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Lewiński
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Institute
of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| |
Collapse
|