1
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Krämer F, Paradies J, Fernández I, Breher F. A crystalline aluminium-carbon-based ambiphile capable of activation and catalytic transfer of ammonia in non-aqueous media. Nat Chem 2024; 16:63-69. [PMID: 37770550 DOI: 10.1038/s41557-023-01340-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 08/31/2023] [Indexed: 09/30/2023]
Abstract
Despite recent achievements in the field of frustrated Lewis pairs (FLPs) for small molecule activations, the reversible activation and catalytic transformations of N-H-activated ammonia remain a challenge. Here we report on a rare combination of an aluminium Lewis acid and a carbon Lewis base. A so-called hidden FLP consisting of a phosphorus ylide featuring an aluminium fragment in the ortho position of a phenyl ring scaffold is introduced. Although the formation of the Lewis acid/base adduct is observed in the solid state, which at first glance leads to formally quenched FLP reactivity, we show that the title compound readily reacts with non-aqueous ammonia thermoneutrally and splits the N-H bond reversibly at ambient temperature. In addition, NH3 transfer reactions mediated by a main-group catalyst are presented. This proof-of-principle study is expected to initiate further activities in utilizing N-H-activated ammonia as a readily available, atom-economical nitrogen source.
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Affiliation(s)
- Felix Krämer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Jan Paradies
- Chemistry Department, Paderborn University, Paderborn, Germany
| | - Israel Fernández
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas and Centro de Innovación en Química Avanzada, Universidad Complutense de Madrid, Madrid, Spain
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany.
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2
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Guo Y, Lian X, Zhang H, Zhang X, Chen J, Chen C, Lan X, Shao Y. Systematic Assessment of the Catalytic Reactivity of Frustrated Lewis Pairs in C-H Bond Activation. Molecules 2023; 29:24. [PMID: 38202607 PMCID: PMC10780200 DOI: 10.3390/molecules29010024] [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: 11/23/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
Unreactive C-H bond activation is a new horizon for frustrated Lewis pair (FLP) chemistry. This study provides a systematic assessment of the catalytic reactivity of recently reported intra-molecular FLPs on the activation of typical inert C-H bonds, including 1-methylpyrrole, methane, benzyl, propylene, and benzene, in terms of density functional theory (DFT) calculations. The reactivity of FLPs is evaluated according to the calculated reaction thermodynamic and energy barriers of C-H bond activation processes in the framework of concerted C-H activation mechanisms. As for 1-methylpyrrole, 14 types of N-B-based and 15 types of P-B-based FLPs are proposed to be active. Although none of the evaluated FLPs are able to catalyze the C-H activation of methane, benzyl, or propylene, four types of N-B-based FLPs are suggested to be capable of catalyzing the activation of benzene. Moreover, the influence of the strength of Lewis acid (LA) and Lewis base (LB), and the differences between the influences of LA and LB on the catalytic reactivity of FLPs, are also discussed briefly. This systematic assessment of the catalytic activity of FLPs should provide valuable guidelines to aid the development of efficient FLP-based metal-free catalysts for C-H bond activation.
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Affiliation(s)
- Yongjie Guo
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Xueqi Lian
- Key Laboratory of Electronic Functional Materials and Devices of Guangdong Province, School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; (X.L.); (X.Z.)
| | - Hao Zhang
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Xueling Zhang
- Key Laboratory of Electronic Functional Materials and Devices of Guangdong Province, School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; (X.L.); (X.Z.)
| | - Jun Chen
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Changzhong Chen
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Xiaobing Lan
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Youxiang Shao
- Key Laboratory of Electronic Functional Materials and Devices of Guangdong Province, School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; (X.L.); (X.Z.)
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3
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Henry AT, Nanan DAR, Baines KM. Expanding the scope of bis(catecholato)germane catalysis: hydrosilylation, hydroboration, Friedel-Crafts alkylation and oligomerization. Dalton Trans 2023; 52:10363-10371. [PMID: 37463007 DOI: 10.1039/d3dt01945d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Various applications of bis(catecholato)germanes in catalysis were examined. The hydrosilylation of benzaldehydes, hydroboration of phenylacetylene derivatives, and Friedel-Crafts alkylation using arylalkenes and either diphenylamine or anisole was achieved. Furthermore, the recently reported oligomerization of α-methylstyrene catalyzed by bis(catecholato)germanes with weak donor ligands was examined further. The formation of a trimer species was observed in DCM. VTNA and Hammett analyses of the oligomerization reaction were conducted and an updated mechanism for bis(catecholato)germane catalysis is proposed.
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Affiliation(s)
- Andrew T Henry
- The Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario, Canada.
| | - Dana A R Nanan
- The Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario, Canada.
| | - Kim M Baines
- The Department of Chemistry, Western University, 1151 Richmond Street, London, Ontario, Canada.
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4
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Xiao Y, Tang L, Xu TT, Sheng JYH, Zhou Z, Yue L, Wang G, Oestreich M, Feng JJ. Atom-economic and stereoselective catalytic synthesis of fully substituted enol esters/carbonates of amides in acyclic systems enabled by boron Lewis acid catalysis. Chem Sci 2023; 14:5608-5618. [PMID: 37265723 PMCID: PMC10231430 DOI: 10.1039/d3sc01394d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 04/21/2023] [Indexed: 06/03/2023] Open
Abstract
Carboacyloxylation of internal alkynes is emerging as a powerful and straightforward strategy for enol ester synthesis. However, the reported examples come with limitations, including the utilization of noble metal catalysts, the control of regio- and Z/E selectivity, and an application in the synthesis of enol carbonates. Herein, a boron Lewis acid-catalyzed intermolecular carboacyloxylation of ynamides with esters to access fully substituted acyclic enol esters in high yield with generally high Z/E selectivity (up to >96 : 4) is reported. Most importantly, readily available allylic carbonates are also compatible with this difunctionalization reaction, representing an atom-economic, catalytic and stereoselective protocol for the construction of acyclic β,β-disubstituted enol carbonates of amides for the first time. The application of the carboacyloxylation products to decarboxylative allylations provided a ready access to enantioenriched α-quaternary amides. Moreover, experimental studies and theoretical calculations were performed to illustrate the reaction mechanism and rationalize the stereochemistry.
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Affiliation(s)
- Yuanjiu Xiao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Lei Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Tong-Tong Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Jiang-Yi-Hui Sheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
| | - Zhongyan Zhou
- College of Biology, Mass Spectrometry Lab of Bio-Chemistry, Hunan University P. R. China
| | - Lei Yue
- College of Biology, Mass Spectrometry Lab of Bio-Chemistry, Hunan University P. R. China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 P. R. China
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin Strasse des 17. Juni 115 10623 Berlin Germany https://www.tu.berlin/en/organometallics
| | - Jian-Jun Feng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha Hunan 410082 P. R. China
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5
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Paradies J. Structure-Reactivity Relationships in Borane-Based FLP-Catalyzed Hydrogenations, Dehydrogenations, and Cycloisomerizations. Acc Chem Res 2023; 56:821-834. [PMID: 36913645 DOI: 10.1021/acs.accounts.2c00832] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
ConspectusThe activation of molecular hydrogen by main-group element catalysts is an extremely important approach to metal-free hydrogenations. These so-called frustrated Lewis pairs advanced within a short period of time to become an alternative to transition metal catalysis. However, deep understanding of the structure-reactivity relationship is far less developed compared to that of transition metal complexes, although it is paramount for advancing frustrated Lewis pair chemistry.In this Account, we provide detailed insight into how Lewis acidity and Lewis basicity correlate to reactivity. The reactivity of frustrated Lewis pairs will be systematically discussed in context with selected reactions. The influence of major electronic modifications of the Lewis pairs is correlated with the ability to activate molecular hydrogen, to channel reaction kinetics and reaction pathways, or to achieve C(sp3)-H activations.First, we will describe how we entered this emerging field of research after quickly realizing that information was lacking on how the reactivity changes with modification of the frustrated Lewis pair. This led us to the development of a qualitative and quantitative structure-reactivity relationship in metal-free imine hydrogenations. The imine hydrogenation was utilized as the model reaction to experimentally determine the activation parameters of the FLP-mediated hydrogen activation for the first time. This kinetic study revealed autoinduced catalytic profiles when Lewis acids weaker than tris(pentafluorophenyl)borane were applied, opening up to study the Lewis base dependency within one system. With this knowledge of the interplay between Lewis acid strength and Lewis basicity, we developed methods for the hydrogenation of densely functionalized nitroolefins, acrylates, and malonates. Here, the reduced Lewis acidity needed to be counterbalanced by a suitable Lewis base to ensure efficient hydrogen activation. The opposite measure was necessary for the hydrogenation of unactivated olefins. For these, comparably less electron-releasing phosphanes were required to generate strong Brønsted acids by hydrogen activation. These systems displayed highly reversible hydrogen activation even at temperatures as low as -60 °C. A systematic study of these systems enabled the development of acceptorless dehydrocouplings of amines with silanes and dehydrogenations of aza-heterocycles by C(sp3)-H activations. Furthermore, the C(sp3)-H and π-activation was utilized to achieve cycloisomerizations by carbon-carbon and carbon-nitrogen bond formations. Lastly, new frustrated Lewis pair systems featuring weak Lewis bases as active components in the hydrogen activation were developed for the reductive deoxygenation of phosphane oxides and carboxylic acid amides.
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Affiliation(s)
- Jan Paradies
- Chemistry Department, Paderborn University, Warburger Strasse 100, 33098 Paderborn, Germany
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6
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Shi Y, Zeng Y, Kucheryavy P, Yin X, Zhang K, Meng G, Chen J, Zhu Q, Wang N, Zheng X, Jäkle F, Chen P. Dynamic B/N Lewis Pairs: Insights into the Structural Variations and Photochromism via Light-Induced Fluorescence to Phosphorescence Switching. Angew Chem Int Ed Engl 2022; 61:e202213615. [PMID: 36287039 DOI: 10.1002/anie.202213615] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Indexed: 11/18/2022]
Abstract
Ultralong afterglow emissions due to room-temperature phosphorescence (RTP) are of paramount importance in the advancement of smart sensors, bioimaging and light-emitting devices. We herein present an efficient approach to achieve rarely accessible phosphorescence of heavy atom-free organoboranes via photochemical switching of sterically tunable fluorescent Lewis pairs (LPs). LPs are widely applied in and well-known for their outstanding performance in catalysis and supramolecular soft materials but have not thus far been exploited to develop photo-responsive RTP materials. The intramolecular LP M1BNM not only shows a dynamic response to thermal treatment due to reversible N→B coordination but crystals of M1BNM also undergo rapid photochromic switching. As a result, unusual emission switching from short-lived fluorescence to long-lived phosphorescence (rad-M1BNM, τRTP =232 ms) is observed. The reported discoveries in the field of Lewis pairs chemistry offer important insights into their structural dynamics, while also pointing to new opportunities for photoactive materials with implications for fast responsive detectors.
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Affiliation(s)
- Yafei Shi
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Yi Zeng
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Pavel Kucheryavy
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA
| | - Xiaodong Yin
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Kai Zhang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Guoyun Meng
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Jinfa Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Qian Zhu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Nan Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Xiaoyan Zheng
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA
| | - Pangkuan Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing, 102488, China
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7
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Chatterjee I, Kumar G, Bhattacharya D. Lewis Acid‐Assisted Transition Metal‐Free Aminocyanation of Alkynes with Arylamines and N‐Cyanosuccinimide. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Gautam Kumar
- Indian Institute of Technology Ropar Department of Chemistry INDIA
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8
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Nie Z, Lv H, Yang T, Su M, Luo W, Liu Q, Guo C. Synthesis of Non‐Terminal Alkenyl Ethers, Alkenyl Sulfides, and N‐Vinylazoles from Arylaldehydes or Diarylketones, DMSO and O, S, N‐Nucleophiles. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zhiwen Nie
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Huifang Lv
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Tonglin Yang
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Miaodong Su
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Weiping Luo
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Qiang Liu
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Cancheng Guo
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
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9
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Sarkar P, Das S, Pati SK. Recent Advances in Group 14 and 15 Lewis Acids for Frustrated Lewis Pair Chemistry. Chem Asian J 2022; 17:e202200148. [PMID: 35320614 DOI: 10.1002/asia.202200148] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/22/2022] [Indexed: 11/10/2022]
Abstract
Frustrated Lewis pairs (FLP) which rely on the cooperative action of Lewis acids and Lewis bases, played a prominent role in the advancement of main-group catalysis. While the early days of FLP chemistry witnessed the dominance of boranes, there is a growing body of reports on alternative Lewis acids derived from groups 14 and 15. This short review focuses on the discovery of such non-boron candidates reported since 2015.
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Affiliation(s)
- Pallavi Sarkar
- Jawaharlal Nehru Centre for Advanced Scientific Research, Theoretical Sciences Unit, INDIA
| | - Shubhajit Das
- Jawaharlal Nehru Centre for Advanced Scientific Research, New Chemstry Unit, INDIA
| | - Swapan K Pati
- JNCASR, Theoretical Sciences Unit and New Chemistry Unit, Jakkur Campus, 560064, Bangalore, INDIA
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10
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Zhao Y, Jin L, Guo J, Stephan DW. Catalytic hydroaminations of alkynes: A facile protocol to vinyl- carbazole derivatives via a frustrated Lewis pair mechanism. Chem Commun (Camb) 2022; 58:3039-3042. [DOI: 10.1039/d1cc07171h] [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
N-vinylcarbazoles are important skeletons for photoluminescent materials. Herein, a metal-free, B(C6F5)3 mediated carbazolation reaction of alkynes is reported. This provides 24 variants of N-vinylcarbazole derivatives. These N-vinylcarbazole products were obtained...
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11
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Guan Y, Chang K, Sun Q, Xu X. Progress in Rare-Earth Metal-Based Lewis Pair Chemistry. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202112008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Kumar G, Qu ZW, Grimme S, Chatterjee I. Boron-Catalyzed Hydroarylation of 1,3-Dienes with Arylamines. Org Lett 2021; 23:8952-8957. [PMID: 34709846 DOI: 10.1021/acs.orglett.1c03457] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Catalytic hydroarylation reactions of conjugated dienes are achieved using tris(pentafluorophenyl)borane as a Lewis acid catalyst under mild reaction conditions. This new protocol shows a broad substrate scope for the highly regioselective functionalization of sterically hindered aniline derivatives. Experimental and extensive density functional theory mechanistic studies show that the complex of residual water and B(C6F5)3 plays a crucial role in the aryl-assisted protonation of conjugated dienes, forming allyl cation intermediates that induce the facile electrophilic aromatic substitution of aniline substrates.
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Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstrasse 4, 53115 Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstrasse 4, 53115 Bonn, Germany
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
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13
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Wasa M, Yesilcimen A. Enantioselective Cooperative Catalysis within Frustrated Lewis Pair Complexes. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.1065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center, Boston College
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14
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Yuan W, Huang J, Xu X, Wang L, Tang XY. B(C 6F 5) 3-Catalyzed Electron Donor-Acceptor Complex-Mediated Aerobic Sulfenylation of Indoles under Visible-Light Conditions. Org Lett 2021; 23:7139-7143. [PMID: 34449237 DOI: 10.1021/acs.orglett.1c02553] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient B(C6F5)3-catalyzed aerobic oxidative C-S cross-coupling reaction of thiophenol with indoles was developed, affording a wide range of diaryl sulfides in good yields. An electron donor-acceptor complex between B(C6F5)3 and indoles was formed, facilitating the photoinduced single-electron transfer (SET) from indole substrates to the B(C6F5)3 catalyst. This protocol demonstrates a new reaction model using B(C6F5)3 as a single-electron oxidant.
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Affiliation(s)
- Wenkai Yuan
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei430074, China
| | - Jie Huang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei430074, China
| | - Xin Xu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei430074, China
| | - Long Wang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei430074, China
| | - Xiang-Ying Tang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei430074, China.,Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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15
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Chan YC, Bai Y, Chen WC, Chen HY, Li CY, Wu YY, Tseng MC, Yap GPA, Zhao L, Chen HY, Ong TG. Synergistic Catalysis by Brønsted Acid/Carbodicarbene Mimicking Frustrated Lewis Pair-Like Reactivity. Angew Chem Int Ed Engl 2021; 60:19949-19956. [PMID: 34128303 DOI: 10.1002/anie.202107127] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Indexed: 01/06/2023]
Abstract
Carbodicarbene (CDC), unique carbenic entities bearing two lone pairs of electrons are well-known for their strong Lewis basicity. We demonstrate herein, upon introducing a weak Brønsted acid benzyl alcohol (BnOH) as a co-modulator, CDC is remolded into a Frustrated Lewis Pair (FLP)-like reactivity. DFT calculation and experimental evidence show BnOH loosely interacting with the binding pocket of CDC via H-bonding and π-π stacking. Four distinct reactions in nature were deployed to demonstrate the viability of proof-of-concept as synergistic FLP/Modulator (CDC/BnOH), demonstrating enhanced catalytic reactivity in cyclotrimerization of isocyanate, polymerization process for L-lactide (LA), methyl methacrylate (MMA) and dehydrosilylation of alcohols. Importantly, the catalytic reactivity of carbodicarbene is uniquely distinct from conventional NHC which relies on only single chemical feature of nucleophilicity. This finding also provides a new spin in diversifying FLP reactivity with co-modulator or co-catalyst.
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Affiliation(s)
- Yi-Chen Chan
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C.,Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, Taiwan, R.O.C.,Taiwan International Graduate Program (TIGP), Sustainable Chemical Science and Technology (SCST), Academia Sinica, Taipei, Taiwan, R.O.C
| | - Yuna Bai
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Wen-Ching Chen
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, R.O.C
| | - Chen-Yu Li
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, R.O.C
| | - Ying-Yann Wu
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C
| | - Mei-Chun Tseng
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C
| | - Glenn P A Yap
- The Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Lili Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, R.O.C.,Department of Medicinal Research, Kaohsiung Medical University Hospital, Kaohsiung, 80708, Taiwan, R.O.C
| | - Tiow-Gan Ong
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C.,Department of Chemistry, National (Taiwan) University, Taipei, Taiwan, R.O.C
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16
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Chan Y, Bai Y, Chen W, Chen H, Li C, Wu Y, Tseng M, Yap GPA, Zhao L, Chen H, Ong T. Synergistic Catalysis by Brønsted Acid/Carbodicarbene Mimicking Frustrated Lewis Pair‐Like Reactivity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yi‐Chen Chan
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan, R.O.C
- Taiwan International Graduate Program (TIGP) Sustainable Chemical Science and Technology (SCST) Academia Sinica Taipei Taiwan, R.O.C
| | - Yuna Bai
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing China
| | - Wen‐Ching Chen
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
| | - Hsing‐Yin Chen
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan, R.O.C
| | - Chen‐Yu Li
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan, R.O.C
| | - Ying‐Yann Wu
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
| | - Mei‐Chun Tseng
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
| | - Glenn P. A. Yap
- The Department of Chemistry and Biochemistry University of Delaware Newark DE USA
| | - Lili Zhao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing China
| | - Hsuan‐Ying Chen
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan, R.O.C
- Department of Medicinal Research Kaohsiung Medical University Hospital Kaohsiung, 80708 Taiwan, R.O.C
| | - Tiow‐Gan Ong
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
- Department of Chemistry National (Taiwan) University Taipei Taiwan, R.O.C
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17
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Nie Z, Lv H, Li H, Su M, Yang T, Luo W, Liu Q, Guo C. Synthesis of Terminal
N
‐Vinylazoles from Aromatic Aldehydes, DMSO, and Azoles Based DMSO as Terminal Carbon Synthon. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100663] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhiwen Nie
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Huifang Lv
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Hui Li
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Miaodong Su
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Tonglin Yang
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Weiping Luo
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Qiang Liu
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Cancheng Guo
- College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
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18
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Parida R, Inostroza Rivera R, Sinha S, Giri S. Can Superhalogen Ligand Make More Reactive Frustrated Lewis Pairs? ChemistrySelect 2021. [DOI: 10.1002/slct.202102189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Rakesh Parida
- School of Applied Science and Humanities Haldia Institute of Technology Haldia 721657 India
- Department of Chemistry National Institute of Technology Rourkela Odisha 769008 India
| | - Ricardo Inostroza Rivera
- Departmento de Quimica Organica Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile Macul 7820436 Santiago Chile
| | - Swapan Sinha
- School of Applied Science and Humanities Haldia Institute of Technology Haldia 721657 India
| | - Santanab Giri
- School of Applied Science and Humanities Haldia Institute of Technology Haldia 721657 India
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19
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Shibuya M, Matsuda M, Yamamoto Y. 1,2-Carbopentafluorophenylation of Alkynes: The Metallomimetic Pull-Push Reactivity of Tris(pentafluorophenyl)borane. Chemistry 2021; 27:8822-8831. [PMID: 33860597 DOI: 10.1002/chem.202101090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Indexed: 12/26/2022]
Abstract
We report the novel single-step 1,2-dicarbofunctionalization of an arylacetylene with an allylsilane and tris(pentafluorophenyl)borane [B(C6 F5 )3 ] involving C-C bond formation with C-H bond scission at the β-position to the silicon atom of an allylsilane and B→C migration of a C6 F5 group. The 1,2-carbopentafluorophenylation occurs smoothly without the requirement for a catalyst or heating. Mechanistic studies suggest that the metallomimetic "pull-push" reactivity of B(C6 F5 )3 imparts consecutive electrophilic and nucleophilic characteristics to the benzylic carbon of the arylacetylene. Subsequent photochemical 6π-electrocyclization affords tetrafluoronaphthalenes, which are important in the pharmaceutical and materials sciences. Owing to the unique reactivity of B(C6 F5 )3 , the 1,2-carbopentafluorophenylation using 2-substituted furan proceeded with ring opening, and the reaction using silyl enolates formed a C-C bond with C-O bond scission at the silyloxy-substituted carbon.
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Affiliation(s)
- Masatoshi Shibuya
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Miki Matsuda
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
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20
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Ma Y, Lou SJ, Hou Z. Electron-deficient boron-based catalysts for C-H bond functionalisation. Chem Soc Rev 2021; 50:1945-1967. [PMID: 33325932 DOI: 10.1039/d0cs00380h] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In contrast to transition metal-catalysed C-H functionalisation, highly efficient construction of C-C and C-X (X = N, O, S, B, Si, etc.) bonds through metal-free catalytic C-H functionalisation remains one of the most challenging tasks for synthetic chemists. In recent years, electron-deficient boron-based catalyst systems have exhibited great potential for C-H bond transformations. Such emerging systems may greatly enrich the chemistry of C-H functionalisation and main-group element catalysis, and will also provide enormous opportunities in synthetic chemistry, materials chemistry, and chemical biology. This article aims to give a timely comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C-H functionalisation and stimulate the development of more efficient catalytic systems.
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Affiliation(s)
- Yuanhong Ma
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine (Ministry of Educational of China), Key Laboratory of Phytochemistry R&D of Hunan Province, and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Shao-Jie Lou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. and Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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21
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Bismuto A, Cowley MJ, Thomas SP. Zwitterion‐Initiated Hydroboration of Alkynes and Styrene. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001323] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Alessandro Bismuto
- University of Edinburgh Joseph Black Building David Brewster Road Edinburgh EH9 3FJ
| | - Michael J. Cowley
- University of Edinburgh Joseph Black Building David Brewster Road Edinburgh EH9 3FJ
| | - Stephen P. Thomas
- University of Edinburgh Joseph Black Building David Brewster Road Edinburgh EH9 3FJ
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22
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Navarro M, Campos J. Bimetallic frustrated Lewis pairs. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2021. [DOI: 10.1016/bs.adomc.2021.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Zhou Y, Jiang S, Xu X. Isospecific Polymerization of Methyl Methacrylate by Intramolecular
Rare‐Earth
Metal Based Lewis Pairs†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000441] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yiqun Zhou
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Shengjie Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
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24
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Lin H, Patel S, Jäkle F. Tailored Triarylborane Polymers as Supported Catalysts and Luminescent Materials. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02258] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Huina Lin
- Department of Chemistry, Rutgers University–Newark, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Shivani Patel
- Department of Chemistry, Rutgers University–Newark, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University–Newark, 73 Warren Street, Newark, New Jersey 07102, United States
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25
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Guddorf BJ, Hepp A, Daniliuc C, Stephan DW, Lips F. An intermolecular FLP System derived from an NHC-coordinated trisilacyclopropylidene. Dalton Trans 2020; 49:13386-13392. [PMID: 32955533 DOI: 10.1039/d0dt02797a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The NHC-coordinated trisilacyclopropylidene (A) is shown to behave as the basic component of an FLP used in combination with the Lewis acid B(C6F4H)3 (i.e. B(2,3,5,6-C6F4H)3). This FLP cleaves dihydrogen highly selectively at room temperature giving rise to the ionic compound [(NHC)SiH(Mes2SiSiMes2)][HB(C6F4H)3] 1 in 90% isolated yield. Further reaction of the FLP with Ph2NH and acetone yielded compounds [(NHC)SiH(Mes2SiSiMes2)][Ph2NB(C6F4H)3] 2 and [(NHC)SiH(Mes2SiSiMes2)][MeC(CH2)OB(C6F4H)3] 3 in 75% and 80% yield, respectively. Reaction of the FLP with N2O results in the oxidation of the silylene center affording [((NHC)SiOB(C6F4H)3)(Mes2SiSiMes2)] 4 in 53% yield. These products are spectroscopically characterized and an X-ray structure of 4 is reported.
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Affiliation(s)
- Benedikt J Guddorf
- Westfälische Wilhelms-Universität Münster, Institut für Anorganische und Analytische Chemie, Corrensstraße 28-30, D-48149 Münster, Germany
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26
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Dabringhaus P, Schorpp M, Scherer H, Krossing I. A Highly Lewis Acidic Strontium ansa-Arene Complex for Lewis Acid Catalysis and Isobutylene Polymerization. Angew Chem Int Ed Engl 2020; 59:22023-22027. [PMID: 32776669 PMCID: PMC7756322 DOI: 10.1002/anie.202010019] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Indexed: 12/18/2022]
Abstract
The potential of a dicationic strontium ansa‐arene complex for Lewis acid catalysis has been explored. The key to its synthesis was a simple salt metathesis from SrI2 and 2 Ag[Al(ORF)4], giving the base‐free strontium‐perfluoroalkoxyaluminate Sr[Al(ORF)4]2 (ORF=OC(CF3)3). Addition of an ansa‐arene yielded the highly Lewis acidic, dicationic strontium ansa‐arene complex. In preliminary experiments, the complex was successfully applied as a catalyst in CO2‐reduction to CH4 and a surprisingly controlled isobutylene polymerization reaction.
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Affiliation(s)
- Philipp Dabringhaus
- Institut für anorganische und analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg i.Br., Germany
| | - Marcel Schorpp
- Institut für anorganische und analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg i.Br., Germany
| | - Harald Scherer
- Institut für anorganische und analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg i.Br., Germany
| | - Ingo Krossing
- Institut für anorganische und analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg i.Br., Germany
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27
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Dabringhaus P, Schorpp M, Scherer H, Krossing I. A Highly Lewis Acidic Strontium
ansa
‐Arene Complex for Lewis Acid Catalysis and Isobutylene Polymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Philipp Dabringhaus
- Institut für anorganische und analytische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg i.Br. Germany
| | - Marcel Schorpp
- Institut für anorganische und analytische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg i.Br. Germany
| | - Harald Scherer
- Institut für anorganische und analytische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg i.Br. Germany
| | - Ingo Krossing
- Institut für anorganische und analytische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg i.Br. Germany
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28
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Affiliation(s)
- Nan Li
- 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 China
- Henan Key Laboratory of Function‐Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang Henan 471934 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 China
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29
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30
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Hidalgo N, Moreno JJ, Pérez-Jiménez M, Maya C, López-Serrano J, Campos J. Evidence for Genuine Bimetallic Frustrated Lewis Pair Activation of Dihydrogen with Gold(I)/Platinum(0) Systems. Chemistry 2020; 26:5982-5993. [PMID: 31971290 DOI: 10.1002/chem.201905793] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/22/2020] [Indexed: 01/07/2023]
Abstract
A joint experimental/computational effort to elucidate the mechanism of dihydrogen activation by a gold(I)/platinum(0) metal-only frustrated Lewis pair (FLP) is described herein. The drastic effects on H2 activation derived from subtle ligand modifications have also been investigated. The importance of the balance between bimetallic adduct formation and complete frustration has been interrogated, providing for the first time evidence for genuine metal-only FLP reactivity in solution. The origin of a strong inverse kinetic isotopic effect has also been clarified, offering further support for the proposed bimetallic FLP-type cleavage of dihydrogen.
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Affiliation(s)
- Nereida Hidalgo
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Juan José Moreno
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Marina Pérez-Jiménez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Celia Maya
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
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31
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Guo J, Cheong O, Bamford KL, Zhou J, Stephan DW. Frustrated Lewis pair-catalyzed double hydroarylation of alkynes with N-substituted pyrroles. Chem Commun (Camb) 2020; 56:1855-1858. [DOI: 10.1039/c9cc08654d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Metal-free hydroarylation of alkynes with N-substituted pyrroles is shown to be efficiently mediated by B(C6F5)3 to yield variants of dipyrrole methanes. The mechanism is shown to proceed via an FLP addition pathway.
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Affiliation(s)
- Jing Guo
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
| | - Odelia Cheong
- Department of Chemistry and Biological Chemistry
- Nanyang Technological University
- Singapore
| | | | - Jiliang Zhou
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
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32
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Guru MM, Thorve PR, Maji B. Boron-Catalyzed N-Alkylation of Arylamines and Arylamides with Benzylic Alcohols. J Org Chem 2019; 85:806-819. [PMID: 31804079 DOI: 10.1021/acs.joc.9b02816] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A sustainable boron-based catalytic approach for chemoselective N-alkylation of primary and secondary aromatic amines and amides with primary, secondary, and tertiary benzylic alcohols has been presented. The metal-free protocol operates at low catalyst loading, tolerates several functional groups, and generates H2O as the sole byproduct. Preliminary mechanistic studies were performed to demonstrate the crucial role of boron catalyst for the activation of the intermediate dibenzyl ether and to identify the rate-determining step.
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Affiliation(s)
- Murali Mohan Guru
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741246 , India
| | - Pradip Ramdas Thorve
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741246 , India
| | - Biplab Maji
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741246 , India
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33
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Sun X, Zhu Q, Xie Z, Su W, Zhu J, Zhu C. An Unprecedented Ga/P Frustrated Lewis Pair: Synthesis, Characterization, and Reactivity. Chemistry 2019; 25:14295-14299. [DOI: 10.1002/chem.201904081] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Xiong Sun
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
| | - Qin Zhu
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), andDepartment of ChemistryCollege of Chemistry, and Chemical EngineeringXiamen University Xiamen 361005 P. R. China
| | - Zhuoyi Xie
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
| | - Wei Su
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
| | - Jun Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), andDepartment of ChemistryCollege of Chemistry, and Chemical EngineeringXiamen University Xiamen 361005 P. R. China
| | - Congqing Zhu
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
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34
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Hu GF, Li HJ, Zeng C, Wang X, Wang N, Peng T, Wang S. Internal B-O Bond-Facilitated Photoisomerization of Boranes: Ring Expansion Versus Oxyborane Elimination/Intramolecular Diels-Alder Addition. Org Lett 2019; 21:5285-5289. [PMID: 31247779 DOI: 10.1021/acs.orglett.9b01892] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Boron compounds (1-4) containing an internal B-O bond have been found to undergo facile multistructural transformations upon irradiation at 365 or 410 nm, generating rare 8-membered B,O-heterocycles (1c-4c). In addition, 2 and 3 also undergo an intramolecular Diels-Alder addition and oxyborane elimination concomitantly, via intermediates 2b/3b, producing 2d/3d. The pathways to isomer c and product d were found to be a thermal process and a photo process, respectively.
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Affiliation(s)
- Guo-Fei Hu
- Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , China
| | - Hai-Jun Li
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
| | - Chao Zeng
- Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , China
| | - Xiang Wang
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
| | - Nan Wang
- Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , China
| | - Tai Peng
- Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , China
| | - Suning Wang
- Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , China.,Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
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35
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Hoshimoto Y, Ogoshi S. Triarylborane-Catalyzed Reductive N-Alkylation of Amines: A Perspective. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01356] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yoichi Hoshimoto
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sensuke Ogoshi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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36
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Zwettler N, Mösch-Zanetti NC. Interaction of Metal Oxido Compounds with B(C 6 F 5 ) 3. Chemistry 2019; 25:6064-6076. [PMID: 30707470 DOI: 10.1002/chem.201805148] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Indexed: 11/07/2022]
Abstract
Lewis acid-base pair chemistry has been placed on a new level with the discovery that adduct formation between an electron donor (Lewis base) and acceptor (Lewis acid) can be inhibited by the introduction of steric demand, thus preserving the reactivity of both Lewis centers, resulting in highly unusual chemistry. Some of these highly versatile frustrated Lewis pairs (FLP) are capable of splitting a variety of small molecules, such as dihydrogen, in a heterolytic and even catalytic manner. This is in sharp contrast to classical reactions where the inert substrate must be activated by a metal-based catalyst. Very recently, research has emerged combining the two concepts, namely the formation of FLPs in which a metal compound represents the Lewis base, allowing for novel chemistry by using the heterolytic splitting power of both together with the redox reactivity of the metal. Such reactivity is not restricted to the metal center itself being a Lewis acid or base, also ancillary ligands can be used as part of the Lewis pair, still with the benefit of the redox-active metal center nearby. This Minireview is designed to highlight the novel reactions arising from the combination of metal oxido transition-metal or rare-earth-metal compounds with the Lewis acid B(C6 F5 )3 . It covers a wide area of chemistry including small molecule activation, hydrogenation and hydrosilylation catalysis, and olefin metathesis, substantiating the broad influence of the novel concept. Future goals of this young and exciting area are briefly discussed.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry/Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010, Graz, Austria
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry/Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010, Graz, Austria
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37
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Ueno A, Watanabe K, Daniliuc CG, Kehr G, Erker G. Unsaturated vicinal frustrated phosphane/borane Lewis pairs as ligands in gold(i) chemistry. Chem Commun (Camb) 2019; 55:4367-4370. [PMID: 30912538 DOI: 10.1039/c9cc01136f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The P/B FLP 6, formed by the 1,1-hydroboration of dimesitylphosphino(trimethylsilyl)acetylene with HB(C6F5)2 forms the Au(i)X complexes 9a (X: Cl) and 10a (X: NTf2), respectively. Both show marked AuB interactions. The P/B FLP isomer 8, featuring the bulky SiMe3 substituent at the carbon adjacent to boron forms gold complexes 9b and 10b, both of which show weaker AuB interactions. Complex 10a was employed in the catalytic hydroamination of a series of alkynes with p-toluidine. Complexes 9 and 10 were characterized by X-ray diffraction.
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Affiliation(s)
- Atsushi Ueno
- Organisch-Chemisches Institut der Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
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38
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San HH, Wang CY, Zeng HP, Fu ST, Jiang M, Tang XY. Boron-Catalyzed Azide Insertion of α-Aryl α-Diazoesters. J Org Chem 2019; 84:4478-4485. [DOI: 10.1021/acs.joc.8b03278] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Htet Htet San
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
| | - Chun-Ying Wang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
| | - Hai-Peng Zeng
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
| | - Shi-Tao Fu
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
| | - Min Jiang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Xiang-Ying Tang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People’s Republic of China
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39
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40
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Abstract
The study of main-group molecules that behave and react similarly to transition-metal (TM) complexes has attracted significant interest in recent decades. Most notably, the attractive idea of replacing the all-too-often rare and costly metals from catalysis has motivated efforts to develop main-group-element-mediated reactions. Main-group elements, however, lack the electronic flexibility of TM complexes that arises from combinations of empty and filled d orbitals and that seem ideally suited to bind and activate many substrates. In this review, we look at boron, an element that despite its nonmetal nature, low atomic weight, and relative redox staticity has achieved great milestones in terms of TM-like reactivity. We show how in interelement cooperative systems, diboron molecules, and hypovalent complexes the fifth element can acquire a truly metallomimetic character. As we discuss, this character is powerfully demonstrated by the reactivity of boron-based molecules with H2, CO, alkynes, alkenes and even with N2.
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41
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Bentley JN, Caputo CB. Substituent effects on the Lewis acidity of 4,6-di-tert-butylchatechol boronate esters. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.11.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Hasenbeck M, Müller T, Gellrich U. Metal-free gem selective dimerization of terminal alkynes catalyzed by a pyridonate borane complex. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00253g] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The metal-free dimerization of alkynes catalyzed by a pyridonate borane complex via a 1,2-carboration is reported.
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Affiliation(s)
- Max Hasenbeck
- Institute of Organic Chemistry
- Justus-Liebig University
- 35392 Giessen
- Germany
| | - Tizian Müller
- Institute of Organic Chemistry
- Justus-Liebig University
- 35392 Giessen
- Germany
| | - Urs Gellrich
- Institute of Organic Chemistry
- Justus-Liebig University
- 35392 Giessen
- Germany
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43
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Michon C, Gilbert J, Trivelli X, Nahra F, Cazin CSJ, Agbossou-Niedercorn F, Nolan SP. Gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes: towards functionalised azoles. Org Biomol Chem 2019; 17:3805-3811. [DOI: 10.1039/c9ob00587k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Vinyl- and saturated azoles were synthesised through gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes and subsequent hydrogenation.
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Affiliation(s)
| | | | - Xavier Trivelli
- UGSF CNRS
- UMR 8576
- Univ. Lille
- 59655 Villeneuve d'Ascq Cedex
- France
| | - Fady Nahra
- Department of Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | | | | | - Steven P. Nolan
- Department of Chemistry
- Ghent University
- 9000 Gent
- Belgium
- Department of Chemistry
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44
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Liu W, Zeng R, Han Y, Wang Y, Tao H, Chen Y, Liu F, Liang Y. Computational and experimental investigation on the BCl3 promoted intramolecular amination of alkenes and alkynes. Org Biomol Chem 2019; 17:2776-2783. [DOI: 10.1039/c9ob00264b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The BCl3 promoted aminoboration of alkenes and alkynes was investigated both computationally and experimentally, leading to the discovery of a metal-free hydroamination of alkynes.
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Affiliation(s)
- Wei Liu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Ruxin Zeng
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yingbin Han
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yajun Wang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Huimin Tao
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Fang Liu
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
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45
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Cui J, Tang R, Yang B, Lai NC, Jiang J, Deng J, Wong M. Metal‐Free Cyclocarboamination of
ortho
‐Formyl Phenylacetylenes with Secondary Amines: Access to 1,3‐Diamino‐1
H
‐Indenes and 3‐Amino‐1‐Indanones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801318] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jian‐Fang Cui
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
- Department of ChemistrySouthern University of Science and Technology Shenzhen People's Republic of China
| | - Rishi Tang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
| | - Bin Yang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
| | - Nathanael Chun‐Him Lai
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
| | - Jia‐Jun Jiang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
| | - Jie‐Ren Deng
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
| | - Man‐Kin Wong
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic University Hong Kong People's Republic of China
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46
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Ling F, Xiao L, Fang L, Feng C, Xie Z, Lv Y, Zhong W. B(C 6F 5) 3-catalyzed Markovnikov addition of indoles to aryl alkynes: an approach toward bis(indolyl)alkanes. Org Biomol Chem 2018; 16:9274-9278. [PMID: 30483686 DOI: 10.1039/c8ob02805b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of the metal- and solvent-free B(C6F5)3-catalyzed Markovnikov addition of indoles to aryl alkynes was disclosed. Both N-H and N-protected indoles were tolerated, leading to a wide spectrum of versatile bis(indolyl)alkanes in moderate to good yields with high regioselectivities.
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Affiliation(s)
- Fei Ling
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
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47
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Affiliation(s)
- Jan Paradies
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
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48
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Affiliation(s)
- Jordan N. Bentley
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada
| | - Christopher B. Caputo
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada
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49
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San HH, Wang SJ, Jiang M, Tang XY. Boron-Catalyzed O-H Bond Insertion of α-Aryl α-Diazoesters in Water. Org Lett 2018; 20:4672-4676. [PMID: 30033730 DOI: 10.1021/acs.orglett.8b01988] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A catalytic, metal-free O-H bond insertion of α-diazoesters in water in the presence of B(C6F5)3· nH2O (2 mol %) was developed, affording a series of α-hydroxyesters in good to excellent yields. The reaction features easy operation and wide substrate scope, and importantly, no metal is needed as compared with the conventional methods. Significantly, this approach further expands the applications of B(C6F5)3 under water-tolerant conditions.
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Affiliation(s)
- Htet Htet San
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Shi-Jun Wang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Min Jiang
- Key Laboratory of Organofluorine Chemistry , Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
| | - Xiang-Ying Tang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
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50
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Chang K, Wang X, Fan Z, Xu X. Reactions of Neutral Scandium/Phosphorus Lewis Pairs with Small Molecules. Inorg Chem 2018; 57:8568-8580. [DOI: 10.1021/acs.inorgchem.8b01292] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kejian Chang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Xiaoming Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Zhengning Fan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
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