1
|
Zhang J, Xie Z. N-Ligand-Enabled Aromatic Nucleophilic Amination of 1,2-Diaryl-o-Carboranes with (R 2 N) 2 Mg for Selective Synthesis of 4-R 2 N-o-Carboranes and 2-R 2 N-m-Carboranes. Angew Chem Int Ed Engl 2022; 61:e202202675. [PMID: 35579912 DOI: 10.1002/anie.202202675] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Indexed: 11/08/2022]
Abstract
The nucleophilic aromatic BH substitution reaction of carboranes is uncommon, compared to the electrophilic one. This work reported a pyridine-enabled transition-metal-free regioselective nucleophilic aromatic cage B(4)-H amination of 1,2-diaryl-o-carboranes with magnesium bisamides, giving a series of B(4)-aminated o-carboranes. DFT calculations showcased a stepwise B-N formation/B-H cleavage process, in which Mg-H formation/cage closure is the rate-determining step. Unprecedentedly, in the presence of 4,4'-di-tert-butyl-2,2'-dipyridyl (dtbpy), a tandem B(4)-amination/cage isomerization reaction of o-carboranes was discovered for the facile preparation of B(2)-aminated m-carboranes. Control experiments indicated that magnesium complex, bidentate ligand (dtbpy) and reaction temperature were crucial in the cage isomerization process. This direct nucleophilic aromatic cage B-H amination reaction offers an alternative strategy for selective amination of o- and m-carboranes.
Collapse
Affiliation(s)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| |
Collapse
|
2
|
Chlupatý T, Růžičková Z, Kampová H, Merna J, Růžička A. Lithium, Magnesium, and Zinc Centers N,N'-Chelated by an Amine-Amide Hybrid Ligand. Inorg Chem 2022; 61:9392-9404. [PMID: 35706334 DOI: 10.1021/acs.inorgchem.1c03850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis and structure of lithium, magnesium, and zinc complexes N,N'-chelated by a hybrid amine-amido ligand ([2-(Me2NCH2)C6H4NR]-, abbreviated as LNR, where R = H, SiMe3, or Bn) are reported. The reaction of the least sterically demanding LNH with various magnesium sources gives the hexameric imide [LNMg]6 (4) by the elimination of n-butane from LNHMgnBu (2) or by the reaction of LNHLi (1) with MeMgBr. [LNH]2Mg (3) is obtained through the addition of 0.5 equiv of nBu2Mg or Mg[N(SiMe3)2]2 to LNH2 and with 1 equiv of nBu2Mg reacting to 2. Both LNHMgN(SiMe3)2 (6) and isostructural LNHZnN(SiMe3)2 (16) have been prepared using two different approaches: monodeprotonation of LNH2 by Zn/Mg[N(SiMe3)2]2 in a 1:1 ratio or ligand substitution of 2 or LNHZnEt (12) by 0.5 equiv of Sn[N(SiMe3)2]2. The reactions of 2 or 3 with 1 provide the heterotrimetallic complex [LNH]4Li2Mg (5). Benzyl- or trimethylsilyl-substituted anilines [LN(SiMe3)H (7) and LN(Bn)H (8)] with 0.5 equiv of nBu2Mg allow the formation of homoleptic bis(amides) of the [LN(R)]2Mg type (10 and 11). Nevertheless, only the silylated secondary amine 7 is able to provide the heteroleptic n-butylmagnesium amide LN(SiMe3)MgnBu (9) upon reaction with an equimolar amount of nBu2Mg. Similarly, 12, [LNH]2Zn (13), LN(R)ZnEt (17 and 18), and [LN(R)]2Zn [R = SiMe3 (19) and Bn (20)] were prepared by the monodeprotonation of LNH2 or LN(R)H using Et2Zn in the corresponding stoichiometric ratio. LNHZnI was prepared by the nucleophilic substitution of an ethyl chain in 12 by molecular iodine. A heterometallic complex, [LNH]4Li2Zn (14), analogous to 5 was prepared from 12 or 13 with 1 or 2 equiv of 1, respectively.
Collapse
Affiliation(s)
- Tomáš Chlupatý
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Hana Kampová
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Jan Merna
- Faculty of Chemical Technology, Department of Polymers, University of Chemistry and Technology, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Aleš Růžička
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| |
Collapse
|
3
|
Zhang J, Xie Z. N‐Ligand‐Enabled Aromatic Nucleophilic Amination of 1,2‐Diaryl‐
o
‐Carboranes with (R
2
N)
2
Mg for Selective Synthesis of 4‐R
2
N‐
o
‐Carboranes and 2‐R
2
N‐
m
‐Carboranes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong China
| |
Collapse
|
4
|
Thomas CM, Fouilloux H. Ambient Temperature Polymerization of MMA mediated by Ate Complexes. ChemCatChem 2021. [DOI: 10.1002/cctc.202101673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Christophe M. Thomas
- PSL University: Universite PSL Chimie ParisTech 11, rue Pierre et Marie Curie 75005 Paris FRANCE
| | - Hugo Fouilloux
- PSL University: Universite PSL Chimie ParisTech 11 rue Pierre et Marie Curie 75005 Paris FRANCE
| |
Collapse
|
5
|
Zhang J, Tang C, Xie Z. Magnesium-mediated sp 3 C-H activation in cascade cyclization of 1-arylethynyl-2-alkyl- o-carboranes: efficient synthesis of carborane-fused cyclopentanes. Chem Sci 2020; 11:9925-9929. [PMID: 34094253 PMCID: PMC8162123 DOI: 10.1039/d0sc04465b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 09/01/2020] [Indexed: 01/03/2023] Open
Abstract
This work reports an unprecedented cascade cyclization of 1-arylethynyl-2-alkyl-o-carboranes promoted by magnesium-mediated sp3 C-H activation. Treatment of 1-arylethynyl-2-alkyl-o-carboranes with MeMgBr gives a series of carborane-fused cyclopentanes in very good yields. Deuterium labelling and control experiments suggest that HMgBr, resulting in situ from the nucleophilic substitution of cage B-H bonds with Grignard reagent, initiates the reaction, in which magnesium-promoted intramolecular sp3 C-H activation serves as a key step. This work not only offers a new route for the synthesis of carborane-fused cyclopentanes, but also sheds some light on Mg-mediated C-H activation and functionalization.
Collapse
Affiliation(s)
- Jie Zhang
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
| | - Cen Tang
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
| |
Collapse
|
6
|
Guo Z, Xu Y, Chao J, Wei X. Lithium Organoaluminate Complexes as Catalysts for the Conversion of CO
2
into Cyclic Carbonates. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhiqiang Guo
- Scientific Instrument Center Shanxi University 030006 Taiyuan P. R. China
| | - Yuan Xu
- School of Chemistry and Chemical Engineering Shanxi University 030006 Taiyuan P. R. China
| | - Jianbin Chao
- Scientific Instrument Center Shanxi University 030006 Taiyuan P. R. China
| | - Xuehong Wei
- Institute of Applied Chemistry Shanxi University 030006 Taiyuan P. R. China
| |
Collapse
|
7
|
Yeardley C, Kennedy AR, Gros PC, Touchet S, Fairley M, McLellan R, Martínez-Martínez AJ, O'Hara CT. Structural and metal-halogen exchange reactivity studies of sodium magnesiate biphenolate complexes. Dalton Trans 2020; 49:5257-5263. [PMID: 32242567 DOI: 10.1039/d0dt00904k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bimetallic sodium magnesiates have been employed in metal-halogen exchange for the first time. Utilising the racemic phenoxide ligand 5,5',6,6'-tetramethyl-3,3'-di-tert-butyl-1,1'-biphenyl-2,2'-diol [(rac)-BIPHEN-H2], the dialkyl sodium magnesiates [(rac)-BIPHEN]Na2MgBu2(TMEDA)23 and [(rac)-BIPHEN]Na2MgBu2(PMDETA)24 have been synthesised. Both 3 and 4 can be easily prepared through co-complexation of di-n-butylmagnesium with the sodiated (rac)-BIPHEN precursor which can be prepared in situ in hydrocarbon solvent. Prior to the main investigation, synthesis of the sodiated precursor [BIPHEN]2Na4(THF)41 was explored in order to better understand the formation of sodium magnesiates utilising the dianionic (rac)-BIPHEN ligand as the parent ligand. In addition, a BIPHEN-rich sodium magnesiate [BIPHEN]2Na2Mg(THF)42 was prepared and characterised, and its formation was rationalised. Complex 1 and 4 have also been fully characterised in both solid and solution state. In terms of onward reactivity, 3 and 4 have been tested as potential exchange reagents with aryl and heteroaryl iodides to produce aryl and heteroaryl magnesium phenoxides utilising toluene as a non-polar hydrocarbon solvent. Complex 3 reacted smoothly to give a range of aryl and heteroaryl magnesium phenoxides, whilst 4's reactivity is more sluggish.
Collapse
Affiliation(s)
- Callum Yeardley
- WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | - Alan R Kennedy
- WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | | | | | - Michael Fairley
- WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | - Ross McLellan
- WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | - Antonio J Martínez-Martínez
- Supramolecular Organometallic Chemistry Laboratory CIQSO-Center for Research in Sustainable Chemistry & Department of Chemistry University of Huelva Campus El Camen, 21007 Huelva, Spain
| | - Charles T O'Hara
- WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| |
Collapse
|
8
|
Curtis ER, Hannigan MD, Vitek AK, Zimmerman PM. Quantum Chemical Investigation of Dimerization in the Schlenk Equilibrium of Thiophene Grignard Reagents. J Phys Chem A 2020; 124:1480-1488. [DOI: 10.1021/acs.jpca.9b09985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ethan R. Curtis
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109, United States
| | - Matthew D. Hannigan
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109, United States
| | - Andrew K. Vitek
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109, United States
| | - Paul M. Zimmerman
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
9
|
Idzik TJ, Borzyszkowska-Ledwig A, Struk Ł, Sośnicki JG. Magnesiate-Utilized/Benzyne-Mediated Approach to Indenopyridones from 2-Pyridones: An Attempt To Synthesize the Indenopyridine Core of Haouamine. Org Lett 2019; 21:9667-9671. [PMID: 31746620 DOI: 10.1021/acs.orglett.9b03806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An efficient, short-staged synthesis of cis-fused indeno[2,1-b]- and indeno[1,2-c]pyridin-2-ones, starting from 2-pyridones, using magnesiates of type R3MgLi as nucleophilic and deprotonation agents, mediated by benzyne generated in situ, under optimized conditions, is described. Following the developed protocol, rare C4a-arylsubstituted indeno[2,1-b]pyridones, resembling the core of haouamine, were obtained. The protocol offering the one-pot synthesis directly from 2-pyridone is also described.
Collapse
Affiliation(s)
- Tomasz J Idzik
- West Pomeranian University of Technology , Szczecin, Faculty of Chemical Technology and Engineering, Department of Organic and Physical Chemistry , Al. Piastów 42 , Szczecin , 71-065 , Poland
| | - Aleksandra Borzyszkowska-Ledwig
- West Pomeranian University of Technology , Szczecin, Faculty of Chemical Technology and Engineering, Department of Organic and Physical Chemistry , Al. Piastów 42 , Szczecin , 71-065 , Poland
| | - Łukasz Struk
- West Pomeranian University of Technology , Szczecin, Faculty of Chemical Technology and Engineering, Department of Organic and Physical Chemistry , Al. Piastów 42 , Szczecin , 71-065 , Poland
| | - Jacek G Sośnicki
- West Pomeranian University of Technology , Szczecin, Faculty of Chemical Technology and Engineering, Department of Organic and Physical Chemistry , Al. Piastów 42 , Szczecin , 71-065 , Poland
| |
Collapse
|
10
|
Zhu M, Liu L, Zhang Y, Yu HT, Zhang WX, Xi Z. Selective Transformation of Well-Defined Alkenyllithiums to Alkenylmagnesiums via Transmetalation. Chemistry 2018; 24:3186-3191. [DOI: 10.1002/chem.201704611] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Miaomiao Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
- College of Chemistry and Materials Science; Hebei Normal University; Shijiazhuang 050024 P. R. China
| | - Liang Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| | - Yongliang Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| | - Hai-Tao Yu
- College of Chemistry and Materials Science; Hebei Normal University; Shijiazhuang 050024 P. R. China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| |
Collapse
|
11
|
Leng JD, Goodwin CAP, Vitorica-Yrezabal IJ, Mills DP. Salt metathesis routes to homoleptic near-linear Mg(ii) and Ca(ii) bulky bis(silyl)amide complexes. Dalton Trans 2018; 47:12526-12533. [DOI: 10.1039/c8dt00802g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A series of bulky bis(silyl)amide ligands have been utilised to stabilise rare examples of formally 2-coordinate linear or near-linear Mg and Ca complexes.
Collapse
Affiliation(s)
- Ji-Dong Leng
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou Higher Education Mega Center
- Guangzhou
| | | | | | - David P. Mills
- School of Chemistry
- The University of Manchester
- Manchester
- UK
| |
Collapse
|
12
|
Wei B, Zhang WX, Xi Z. Well-defined styryl and biphenyl calcium complexes from dilithio compounds and calcium iodide: synthesis, structure and reactivity toward nitrous oxide. Dalton Trans 2018; 47:12540-12545. [PMID: 29756145 DOI: 10.1039/c8dt01046c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient synthesis and structure elucidation of carbon–calcium σ-bonded compounds are of remarkable interest and importance in organometallic chemistry of the heavier s-block metals.
Collapse
Affiliation(s)
- Baosheng Wei
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| |
Collapse
|
13
|
Fischer R, Görls H, Krieck S, Westerhausen M. Dilithium and Magnesium Alkanediides and 1-Oxaalkanediides. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700222] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Reinald Fischer
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| |
Collapse
|
14
|
Campbell R, Kennedy AR, McLellan R, Robertson SD, Sproules S, Mulvey RE. Contrasting the group 6 metal-metal bonding in sodium dichromate(ii) and sodium dimolybdate(ii) polymethyl complexes: synthetic, X-ray crystallographic and theoretical studies. Dalton Trans 2017; 46:5650-5659. [PMID: 28145549 DOI: 10.1039/c6dt04644d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Extending the class of group 6 metal-metal bonded methylate compounds supported by alkali metal counter-ions, the first sodium octamethylmolybdate(ii) complex [(TMEDA)Na]4Mo2Me8 and heptamethylchromate(ii) relations [(donor)Na]3Cr2Me7 (donor is TMEDA or TMCDA) are reported. The former was made by treating [(Et2O)Li]4Mo2Me8 with four equivalents of NaOtBu/TMEDA in ether; whereas the latter resulted from introducing TMEDA or TMCDA to ether solutions of octamethyldichromate [(Et2O)Na]4Cr2Me8. X-ray crystallography revealed [(TMEDA)Na]4Mo2Me8 is dimeric with square pyramidal Mo centres [including a short Mo-Mo interaction of 2.1403(3) Å] each with four methyl groups in a mutually eclipsed conformation. In dinuclear [(TMCDA)Na]3Cr2Me7 trigonal bi-pyramidal Cr centres each bond to three terminal methyl groups and one common Me bridge, that produces a strikingly short Cr-Cr contact of 1.9136(4) Å. Broken symmetry density functional theoretical calculations expose the multiconfigurational metal-metal bonding in these compounds with a Mo-Mo bond order of 3 computed for octamethylmolybdate(ii). This is contrasted by the single Cr-Cr bond in heptamethylchromate(ii) where the singlet ground state is derived by strong antiferromagnetic coupling between adjacent metal ions.
Collapse
Affiliation(s)
- Ross Campbell
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK.
| | | | | | | | | | | |
Collapse
|
15
|
Guo Z, Wang Y, Cao W, Chao J, Wei X. Structural diversity of alkali-metal (Li, Na, K) alkyl zincates containing bidentate aminopyrrolyl ligands: from molecular complexes to coordination polymers. Dalton Trans 2017; 46:2765-2769. [PMID: 28186519 DOI: 10.1039/c7dt00052a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The exploration of co-complexation reactions between alkai-metal reagents and ZnEt2 with bidentate aminopyrrolyl ligands afforded a series of alkali-metal (Li, Na, K) alkyl zincates with a variety of intriguing structures, ranging from molecular complexes to more coordination polymers. All aforementioned complexes have been characterized by X-ray crystallography, NMR, IR and UV-vis spectroscopy.
Collapse
Affiliation(s)
- Zhiqiang Guo
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Yakong Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| | - Wei Cao
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Jianbin Chao
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P. R. China.
| | - Xuehong Wei
- Scientific Instrument Center, Shanxi University, Taiyuan, 030006, P. R. China. and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| |
Collapse
|
16
|
Sośnicki JG, Idzik T, Borzyszkowska A, Wróblewski E, Maciejewska G, Struk Ł. Addition of novel benzylmagnesium “ate” complexes of BnR2MgLi type to 2-(thio)pyridones and related compounds. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
17
|
Koch A, Görls H, Krieck S, Westerhausen M. Coordination behavior of bidentate bis(carbenes) at alkali metal bis(trimethylsilyl)amides. Dalton Trans 2017; 46:9058-9067. [DOI: 10.1039/c7dt01538k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystallization of LiN(SiMe3)2 from 2,2,5,5-tetramethyltetrahydrofuran yields the base-free tetramer. Strong carbenes monomerize the lithium bis(trimethylsilyl)amides, whereas the heavier congeners from carbene-stabilized dimers [AN(SiMe3)2]2 with A = Na, K.
Collapse
Affiliation(s)
- Alexander Koch
- Friedrich Schiller University Jena
- Institute of Inorganic and Analytical Chemistry
- D-07743 Jena
- Germany
| | - Helmar Görls
- Friedrich Schiller University Jena
- Institute of Inorganic and Analytical Chemistry
- D-07743 Jena
- Germany
| | - Sven Krieck
- Friedrich Schiller University Jena
- Institute of Inorganic and Analytical Chemistry
- D-07743 Jena
- Germany
| | - Matthias Westerhausen
- Friedrich Schiller University Jena
- Institute of Inorganic and Analytical Chemistry
- D-07743 Jena
- Germany
| |
Collapse
|
18
|
Westerhausen M, Koch A, Görls H, Krieck S. Heavy Grignard Reagents: Synthesis, Physical and Structural Properties, Chemical Behavior, and Reactivity. Chemistry 2016; 23:1456-1483. [DOI: 10.1002/chem.201603786] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| | - Alexander Koch
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| |
Collapse
|
19
|
De Tullio M, Hernán-Gómez A, Livingstone Z, Clegg W, Kennedy AR, Harrington RW, Antiñolo A, Martínez A, Carrillo-Hermosilla F, Hevia E. Structural and Mechanistic Insights into s-Block Bimetallic Catalysis: Sodium Magnesiate-Catalyzed Guanylation of Amines. Chemistry 2016; 22:17646-17656. [PMID: 27786387 DOI: 10.1002/chem.201602906] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Indexed: 11/06/2022]
Abstract
To advance the catalytic applications of s-block mixed-metal complexes, sodium magnesiate [NaMg(CH2 SiMe3 )3 ] (1) is reported as an efficient precatalyst for the guanylation of a variety of anilines and secondary amines with carbodiimides. First examples of hydrophosphination of carbodiimides by using a Mg catalyst are also described. The catalytic ability of the mixed-metal system is much greater than that of its homometallic components [NaCH2 SiMe3 ] and [Mg(CH2 SiMe3 )2 ]. Stoichiometric studies suggest that magnesiate amido and guanidinate complexes are intermediates in these catalytic routes. Reactivity and kinetic studies imply that these guanylation reactions occur via (tris)amide intermediates that react with carbodiiimides in insertion steps. The rate law for the guanylation of N,N'-diisopropylcarbodiimide with 4-tert-butylaniline catalyzed by 1 is first order with respect to [amine], [carbodiimide], and [catalyst], and the reaction shows a large kinetic isotopic effect, which is consistent with an amine-assisted rate-determining carbodiimide insertion transition state. Studies to assess the effect of sodium in these transformations denote a secondary role with little involvement in the catalytic cycle.
Collapse
Affiliation(s)
- Marco De Tullio
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Alberto Hernán-Gómez
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Zoe Livingstone
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - William Clegg
- School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Alan R Kennedy
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Ross W Harrington
- School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Antonio Antiñolo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA) Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha Campus Universitario, 13071, Ciudad Real, Spain
| | - Antonio Martínez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA) Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha Campus Universitario, 13071, Ciudad Real, Spain
| | - Fernando Carrillo-Hermosilla
- Centro de Innovación en Química Avanzada (ORFEO-CINQA) Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha Campus Universitario, 13071, Ciudad Real, Spain
| | - Eva Hevia
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| |
Collapse
|
20
|
Morisako S, Shang R, Yamamoto Y. Synthesis of a Sterically Demanding Dispiropiperidine and Its Application in Monoamidodialkyl Zincate Complexes. Inorg Chem 2016; 55:10767-10773. [PMID: 27682309 DOI: 10.1021/acs.inorgchem.6b01965] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The new sterically hindered piperidine analog, dispiro[cyclohexane-2,2'-piperidine-6',2″-cyclohexane] (CPC(H), 2), and its N-methylated derivative CPC(Me) (3) were synthesized from commercially available starting materials in short steps. The N-lithiated amide LiCPC (4) was also isolated from 2 as a cyclictrimer in single crystals and showed slightly larger steric hindrance than that of lithium 2,2,6,6-tetramethylpiperidide (LiTMP) in the competitive methylation reaction with methyl trifluoromethanesulfonate. In addition, the heterobimetallic heteroleptic zincate complexes [Li(μ-NR2)(μ-Et)Zn(Et)] (NR2 = CPC, 5, and NR2 = TMP, 6) were obtained as THF- and TMEDA-coordinated monomer 5·(THF)2, 6·(THF)2, 5·TMEDA, and 6·TMEDA (THF = tetrahydrofuran, TMEDA = N,N,N',N'-tetramethylethylenediamine). These molecular structures bearing different amido ligands in single crystals showed little structural differences from crystallographic studies. Diffusion-ordered spectroscopy (DOSY) revealed that the solution structures of the zincate complexes 5·(THF)2 and 6·(THF)2 only differ in the number of coordination THF molecules. In the deprotonation reactions with tert-butyl 3-bromobenzoate, the zincate complexes containing the CPC ligand [Li(μ-CPC)(μ-R)Zn(R)] (R = Et (5), tBu) showed moderately improved regioselectivity for the 6 position in comparison to those containing the TMP ligand [Li(μ-TMP)(μ-R)Zn(R)] (R = Et (6), tBu).
Collapse
Affiliation(s)
- Shogo Morisako
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Rong Shang
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Yohsuke Yamamoto
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| |
Collapse
|
21
|
Demkiw K, Araki H, Elliott EL, Franklin CL, Fukuzumi Y, Hicks F, Hosoi K, Hukui T, Ishimaru Y, O'Brien E, Omori Y, Mineno M, Mizufune H, Sawada N, Sawai Y, Zhu L. A Nitrogen-Assisted One-Pot Heteroaryl Ketone Synthesis from Carboxylic Acids and Heteroaryl Halides. J Org Chem 2016; 81:3447-56. [PMID: 26991511 DOI: 10.1021/acs.joc.6b00194] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical and highly effective one-pot synthesis of versatile heteroaryl ketones directly from carboxylic acids and heteroaryl halides under mild conditions is reported. This method does not require derivatization of carboxylic acids (preparation of acid chlorides, Weinreb amides, etc.) or the use of any additives/catalysts. A wide substrate scope of carboxylic acids with high functional group tolerance has also been demonstrated. The results reveal that the presence of an α-nitrogen on the halide substrate greatly improves the desired ketone formation.
Collapse
Affiliation(s)
- Krystyna Demkiw
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Hirofumi Araki
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Eric L Elliott
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Christopher L Franklin
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Yoonjoo Fukuzumi
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Frederick Hicks
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Kazushi Hosoi
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Tadashi Hukui
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Yoichiro Ishimaru
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Erin O'Brien
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Yoshimasa Omori
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Masahiro Mineno
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Hideya Mizufune
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Naotaka Sawada
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Yasuhiro Sawai
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Lei Zhu
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
22
|
Goodwin CAP, Smith A, Ortu F, Vitorica-Yrezabal IJ, Mills DP. Salt metathesis versus protonolysis routes for the synthesis of silylamide Hauser base (R2NMgX; X = halogen) and amido-Grignard (R2NMgR) complexes. Dalton Trans 2016; 45:6004-14. [PMID: 26275169 DOI: 10.1039/c5dt02535d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation of silylamide Hauser base (R2NMgX; X = halide) and amido-Grignard (R2NMgR) complexes from simple Grignard reagents using [K{N(SiMe2(t)Bu)2}]n, [K{N(SiMe2(t)Bu)(Si(i)Pr3)}]n and [K{N(Si(i)Pr3)2}]n, and their parent silylamines, was explored. Both salt metathesis and protonolysis routes proved ineffective with allylmagnesium chloride as a starting material due to complex Schlenk equilibria, with [Mg(N(RR'))(μ-Cl)(THF)]2 (N(RR') = {N(Si(t)BuMe2)2}(-), 1; {N(Si(t)BuMe2)(Si(i)Pr3)}(-), 2; {N(Si(i)Pr3)2}(-), 3) and [Mg{N(Si(i)Pr3)2}(μ-C3H5)]∞ (4) identified as minor products. In contrast, salt metathesis protocols using potassium silylamides and methylmagnesium iodide gave [Mg(N(RR'))(μ-CH3)]2 (N(RR') = {N(Si(t)BuMe2)2}(-), 7a; {N(Si(t)BuMe2)(Si(i)Pr3)}(-), 8; {N(Si(i)Pr3)2}(-), 9) and [Mg{N(Si(t)BuMe2)2}(CH3)(DME)] (7b), with [Mg{N(Si(t)BuMe2)2}(μ-I)(THF)]2 (10) isolated as a side-product during the preparation of 7a. Unusually, methylmagnesium iodide, di-n-butylmagnesium and 7-9 did not react with HN(RR') under the conditions we employed. The synthesis of [Na{N(Si(t)BuMe2)2}(THF)]2 (5a) and [Na{N(Si(t)BuMe2)2}(DME)2] (5b) from benzyl sodium and HN(Si(t)BuMe2)2, and a solvent-free structure of [K{N(Si(t)BuMe2)2}] (6), are also reported. Complexes 1, 5b, 7a, 7b, 8, 9 and 10 are fully characterised by single crystal XRD, multinuclear NMR and IR spectroscopy and elemental analysis, whereas complexes 2-4, 5a and 6 were identified by XRD only.
Collapse
Affiliation(s)
- Conrad A P Goodwin
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | | | | | | | | |
Collapse
|
23
|
Struk Ł, Sośnicki JG, Idzik TJ, Maciejewska G. Sequential Synthesis of Organosilicon-Linked 2-Methoxypyridines by Non-Cryogenicortho-Metallation Using thenBu2TMPMg·Li Reagent and Hydrosilylation. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
24
|
Köhler M, Koch A, Görls H, Westerhausen M. Trimethylsilylmethylcalcium Iodide, an Easily Accessible Grignard-Type Reagent of a Heavy Alkaline Earth Metal. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00956] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mathias Köhler
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstraße
8, D-07743 Jena, Germany
| | - Alexander Koch
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstraße
8, D-07743 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstraße
8, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstraße
8, D-07743 Jena, Germany
| |
Collapse
|
25
|
Goldbach M, Danieli E, Perlo J, Kaptein B, Litvinov VM, Blümich B, Casanova F, Duchateau AL. Preparation of Grignard reagents from magnesium metal under continuous flow conditions and on-line monitoring by NMR spectroscopy. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.11.077] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
26
|
Francos J, Kennedy AR, O'Hara CT. Synthetic and reactivity studies of hetero-tri-anionic sodium zincates. Dalton Trans 2016; 45:6222-33. [DOI: 10.1039/c5dt04329h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The blue, red and green spheres represent three different anions present within a series of novel hetero-trianionic sodium zincates. The syntheses and structures of the complexes are reported as well as their reactivities with important organic molecules.
Collapse
Affiliation(s)
- Javier Francos
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Alan R. Kennedy
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Charles T. O'Hara
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| |
Collapse
|
27
|
Livingstone Z, Hernán-Gómez A, Baillie SE, Armstrong DR, Carrella LM, Clegg W, Harrington RW, Kennedy AR, Rentschler E, Hevia E. Assessing the reactivity of sodium alkyl-magnesiates towards quinoxaline: single electron transfer (SET) vs. nucleophilic alkylation processes. Dalton Trans 2016; 45:6175-82. [PMID: 26617325 DOI: 10.1039/c5dt04044b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Structurally tracking the reaction of a sodium butylmagnesiate supported by a bulky silyl(bisamide) ligand towards quinoxaline, SET reactivity.
Collapse
Affiliation(s)
- Zoe Livingstone
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Alberto Hernán-Gómez
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Sharon E. Baillie
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - David R. Armstrong
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Luca M. Carrella
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes-Gutenberg-Universität Mainz
- 55128 Mainz
- Germany
| | - William Clegg
- School of Chemistry
- Newcastle University
- Newcastle upon Tyne
- UK
| | | | - Alan R. Kennedy
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Eva Rentschler
- Institut für Anorganische Chemie und Analytische Chemie
- Johannes-Gutenberg-Universität Mainz
- 55128 Mainz
- Germany
| | - Eva Hevia
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| |
Collapse
|
28
|
Harder S, Ruspic C. Probing the Salt‐Metathesis Route to Bis(aryl)calcium Compounds: Structure of an Arylcalcate Complex. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501178] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sjoerd Harder
- Inorganic and Organometallic Chemistry, University Erlangen‐Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany, www.harder‐research.com
| | - Christian Ruspic
- Anorganische Chemie, Universität Duisburg‐Essen, Universitätsstrasse 5, 45117 Essen, Germany
| |
Collapse
|
29
|
Link A, Fischer C, Sparr C. Direkte Umwandlung von Estern in Arene mit 1,5-difunktionellen Organomagnesium-Reagentien. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505414] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
30
|
Link A, Fischer C, Sparr C. Direct Transformation of Esters into Arenes with 1,5-Bifunctional Organomagnesium Reagents. Angew Chem Int Ed Engl 2015; 54:12163-6. [DOI: 10.1002/anie.201505414] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Indexed: 11/12/2022]
|
31
|
Sośnicki JG, Dzitkowski P, Struk Ł. Regioselective Synthesis of 6-Vinyl-3,6-dihydropyridine-2(1H)-ones through Simple Addition of a Vinylmagnesium “Ate” Complex to 2-Pyridones. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500605] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
32
|
Younis FM, Krieck S, Görls H, Westerhausen M. s-Block-Metal-Mediated Hydroamination of Diphenylbutadiyne with Primary Arylamines Using a Dipotassium Tetrakis(amino)calciate Precatalyst. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00449] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fadi M. Younis
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University, Humboldtstraße 8, D-07743 Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University, Humboldtstraße 8, D-07743 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University, Humboldtstraße 8, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and
Analytical Chemistry, Friedrich-Schiller-University, Humboldtstraße 8, D-07743 Jena, Germany
| |
Collapse
|
33
|
Clegg W, Crosbie E, Dale-Black SH, Hevia E, Honeyman GW, Kennedy AR, Mulvey RE, Ramsay DL, Robertson SD. Structurally Defined Zincated and Aluminated Complexes of Ferrocene Made by Alkali-Metal Synergistic Syntheses. Organometallics 2015. [DOI: 10.1021/om5012352] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- William Clegg
- School
of Chemistry, Newcastle University, Newcastle upon Tyne, NE1
7RU, U.K
| | - Elaine Crosbie
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | | | - Eva Hevia
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Gordon W. Honeyman
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Alan R. Kennedy
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Robert E. Mulvey
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Donna L. Ramsay
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Stuart D. Robertson
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| |
Collapse
|
34
|
Sugiyama YK, Heigozono S, Okamoto S. Iron-Catalyzed Reductive Magnesiation of Oxetanes to Generate (3-Oxidopropyl)magnesium Reagents. Org Lett 2014; 16:6278-81. [DOI: 10.1021/ol503191w] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yu-ki Sugiyama
- Department
of Material and
Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Shiori Heigozono
- Department
of Material and
Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Sentaro Okamoto
- Department
of Material and
Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| |
Collapse
|
35
|
Scope and limitations of the synthesis of functionalized quinolizidinones and related compounds by a simple precursor approach via addition of lithium allylmagnesates to 2-pyridones and RCM as key steps. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.09.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
36
|
Francos J, Fleming BJ, García-Álvarez P, Kennedy AR, Reilly K, Robertson GM, Robertson SD, O'Hara CT. Complexity in seemingly simple sodium magnesiate systems. Dalton Trans 2014; 43:14424-31. [PMID: 24985749 DOI: 10.1039/c4dt00921e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- J Francos
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
| | | | | | | | | | | | | | | |
Collapse
|
37
|
Armstrong DR, Crosbie E, Hevia E, Mulvey RE, Ramsay DL, Robertson SD. TMP (2,2,6,6-tetramethylpiperidide)-aluminate bases: lithium-mediated alumination or lithiation–alkylaluminium-trapping reagents? Chem Sci 2014. [DOI: 10.1039/c4sc01108b] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Surprisingly lithium TMP-aluminate reagents are not capable of directly aluminating anisole as previously thought but operateviasequential lithiation–alkylaluminium trapping.
Collapse
Affiliation(s)
- David R. Armstrong
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Elaine Crosbie
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Eva Hevia
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Robert E. Mulvey
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Donna L. Ramsay
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Stuart D. Robertson
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| |
Collapse
|