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Tsuyusaki R, Nakashima K, Shimomura M, Kawada M, Matsushima Y, Hirashima SI, Miura T. Highly efficient, asymmetric, and organocatalyst-based Henry reactions between α,β-unsaturated trifluoromethyl ketone and nitromethane. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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2
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De S, Jain A, Barman P. Recent Advances in the Catalytic Applications of Chiral Schiff‐Base Ligands and Metal Complexes in Asymmetric Organic Transformations. ChemistrySelect 2022. [DOI: 10.1002/slct.202104334] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Soumik De
- Department of Chemistry National Institute of Technology Silchar Assam India
| | - Abhinav Jain
- Department of Chemistry National Institute of Technology Silchar Assam India
| | - Pranjit Barman
- Department of Chemistry National Institute of Technology Silchar Assam India
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3
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Kawada M, Tsuyusaki R, Nakashima K, Yamada M, Kozakai A, Matsushima Y, Hirashima SI, Miura T. Asymmetric Henry reaction of trifluoromethyl enones with nitromethane using a N,N-dibenzyl diaminomethylenemalononitrile organocatalyst. Chem Asian J 2021; 17:e202101299. [PMID: 34927372 DOI: 10.1002/asia.202101299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/17/2021] [Indexed: 11/10/2022]
Abstract
A novel N,N -dibenzyl diaminomethylenemalononitrile organocatalyst efficiently promoted asymmetric Henry reactions of trifluoromethyl enones with nitromethane, affording corresponding highly functionalized products in high yields with excellent enantioselectivities (up to 90% ee). This study is the first to report the successful example of the asymmetric 1,2-additions of nitromethane to trifluoromethyl enones.
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Affiliation(s)
- Masahiro Kawada
- Tokyo Yakka Daigaku Yakugakubu Daigakuin Yakugaku Kenkyuka, School of Pharmacy, JAPAN
| | - Ryo Tsuyusaki
- Tokyo Yakka Daigaku Yakugakubu Daigakuin Yakugaku Kenkyuka, school of pharmacy, JAPAN
| | - Kosuke Nakashima
- Tokyo Yakka Daigaku Yakugakubu Daigakuin Yakugaku Kenkyuka, School of pharmacy, JAPAN
| | | | | | | | | | - Tsuyoshi Miura
- Tokyo University of Pharmacy and Life Sciences, School of Pharmacy, 1432-1 Horinouchi, Hachioji, 192-0392, Tokyo, JAPAN
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4
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Giunta D, Arras A, Peluso P, Solinas M. Synthesis of “Click BOX” ligands and preliminary results on their application in the asymmetric copper catalysed Henry reaction of o-methoxybenzaldehyde. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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5
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Colombo Dugoni G, Sacchetti A, Mele A. Deep eutectic solvent as solvent and catalyst: one-pot synthesis of 1,3-dinitropropanes via tandem Henry reaction/Michael addition. Org Biomol Chem 2020; 18:8395-8401. [PMID: 32845266 DOI: 10.1039/d0ob01516d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The Henry reaction was performed using microwave heating within the deep eutectic solvent (DES) choline chloride/urea (ChCl/urea) which acted as both the catalyst and solvent for the reaction. The optimisation of the conditions (temperature, heating mode, time, DES) allowed 1,3-dinitropropane derivatives to be obtained via tandem Henry reaction/Michael addition, in one step from a range of different aromatic aldehydes in high yields and under mild reaction conditions.
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Affiliation(s)
- Greta Colombo Dugoni
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via Mancinelli 7, 20131 Milano, Italy.
| | - Alessandro Sacchetti
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via Mancinelli 7, 20131 Milano, Italy.
| | - Andrea Mele
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via Mancinelli 7, 20131 Milano, Italy. and CNR-ICRM Istituto di Chimica del Riconoscimento Molecolare, "U.O.S. Milano Politecnico", Via L. Mancinelli, 7, 20131 Milano, Italy
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6
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Meng X, Luo Y, Zhao G. Amino acids derived chiral bifunctional (thio)urea tertiary-amines catalyzed asymmetric henry reaction of α-trifluoromethy ketones. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Synthesis and Catalytic Application of Two Mononuclear Complexes Bearing Diethylenetriamine Derivative Ligand. MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25092101. [PMID: 32365868 PMCID: PMC7248821 DOI: 10.3390/molecules25092101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 04/24/2020] [Accepted: 04/27/2020] [Indexed: 11/17/2022]
Abstract
Two mononuclear zero-dimensional Ni(II) and Zn(II) complexes bearing diethylenetriamine derivative ligand, namely [NiL(CH3COO)2(H2O)] (1) and [ZnL(CH3COO)2] (2) [L = N, N'-bis(2-hydroxybenzyl)diethylenetriamine], were synthesized under reflux conditions. The molecular composition and structure of the complexes were identified by IR, PXRD, elemental analyses, and single crystal X-ray diffraction. Complex 1 belongs to a monoclinic crystal system with the P21/n space group, and Complex 2 belongs to a monoclinic crystal system with the C2/c space group. The Henry reaction of nitromethane with aromatic aldehydes was explored with Complexes 1 and 2 as the catalyst. Results from the catalytic reaction revealed that the complexes displayed excellent catalytic activities under the optimized conditions and that the substrate scope of aromatic aldehydes could be extended to a certain extent. In addition, the possible catalytic mechanism of the Henry reaction was also deduced.
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Larionov VA, Yashkina LV, Medvedev MG, Smol'yakov AF, Peregudov AS, Pavlov AA, Eremin DB, Savel'yeva TF, Maleev VI, Belokon YN. Henry Reaction Revisited. Crucial Role of Water in an Asymmetric Henry Reaction Catalyzed by Chiral NNO-Type Copper(II) Complexes. Inorg Chem 2019; 58:11051-11065. [PMID: 31369247 DOI: 10.1021/acs.inorgchem.9b01574] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Chiral copper(II) and cobalt(III) complexes (1-5 and 6, respectively) derived from Schiff bases of (S)-2-(aminomethyl)pyrrolidine and salicylaldehyde derivatives were employed in a mechanistic study of the Henry reaction-type condensation of nitromethane and o-nitrobenzaldehyde in CH2Cl2 (CD2Cl2), containing different amounts of water. The reaction kinetics was monitored by 1H and 13C NMR. The addition of water had a different influence on the activity of the two types of complexes, ranging from a crucial positive effect in the case of the copper(II) complex 2 to insignificant in the case of the stereochemically inert cobalt(III) complex 6. No experimental support was found by 1H NMR studies for the classical Lewis acid complexation of the carbonyl group of the aldehyde by the central copper(II) ion, and, moreover, density functional theory (DFT) calculations support the absence of such coordination. On the other hand, a very significant complexation was found for water, and it was supported by DFT calculations. In fact, we suggest that it is the Brønsted acidity of the water molecule coordinated to the metal ion that triggers the aldehyde activation. The rate-limiting step of the reaction was the removal of an α-proton from the nitromethane molecule, as supported by the observed kinetic isotope effect equaling 6.3 in the case of the copper complex 2. It was found by high-resolution mass spectrometry with electrospray ionization that the copper(II) complex 2 existed in CH2Cl2 in a dimeric form. The reaction had a second-order dependence on the catalyst concentration, which implicated two dimeric forms of the copper(II) complex 2 in the rate-limiting step. Furthermore, DFT calculations help to generate a plausible structure of the stereodetermining transition step of the condensation.
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Affiliation(s)
- Vladimir A Larionov
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation.,Department of Inorganic Chemistry , Peoples' Friendship University of Russia (RUDN University) , Miklukho-Maklaya Street 6 , 117198 Moscow , Russian Federation
| | - Lidiya V Yashkina
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation
| | - Michael G Medvedev
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation.,N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , Leninsky prospect 47 , 119991 Moscow , Russian Federation.,National Research University Higher School of Economics , Myasnitskaya Street 20 , 101000 Moscow , Russian Federation
| | - Alexander F Smol'yakov
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation.,Plekhanov Russian University of Economics , Stremyanny per. 36 , 117997 Moscow , Russian Federation
| | - Alexander S Peregudov
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation
| | - Alexander A Pavlov
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation
| | - Dmitry B Eremin
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , Leninsky prospect 47 , 119991 Moscow , Russian Federation.,The Bridge@USC , University of Southern California , 1002 Childs Way , Los Angeles , California 90089-3502 , United States
| | - Tat'yana F Savel'yeva
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation
| | - Victor I Maleev
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation
| | - Yuri N Belokon
- A. N. Nesmeyanov Institute of Organoelement Compounds , Russian Academy of Sciences , Vavilov Street 28 , 119991 Moscow , Russian Federation
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Otevrel J, Svestka D, Bobal P. Bianthryl-based organocatalysts for the asymmetric Henry reaction of fluoroketones. Org Biomol Chem 2019; 17:5244-5248. [PMID: 31086873 DOI: 10.1039/c9ob00884e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a catalytic system based on bianthrylbis(thiourea) for the asymmetric Henry reaction of fluoroketones and nitroalkanes that resulted from the screening of a library containing 31 chiral non-racemic organocatalysts. The corresponding adducts were isolated in up to 6 times shorter reaction time in comparison with the previously published organocatalysts. High levels of stereocontrol have been generally observed, with measured product enantiomeric excesses up to 97% and diastereomeric ratio 3 : 2 (anti/syn). The above-mentioned catalysts have been successfully applied to the total asymmetric synthesis of CF3-tethered (S)-halostachines, which has proved that this method constitutes an easy entry to similar enantiopure compounds.
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Affiliation(s)
- Jan Otevrel
- Department of Chemical Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho 1, 612 42 Brno, Czech Republic.
| | - David Svestka
- Department of Chemical Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho 1, 612 42 Brno, Czech Republic.
| | - Pavel Bobal
- Department of Chemical Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho 1, 612 42 Brno, Czech Republic.
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10
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Brüllingen E, Neudörfl JM, Goldfuss B. Enantioselective Cu-catalyzed 1,4-additions of organozinc and Grignard reagents to enones: exceptional performance of the hydrido-phosphite-ligand BIFOP-H. NEW J CHEM 2019. [DOI: 10.1039/c8nj05886e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Enantioselective CuI-catalyzed 1,4-additions and DFT computations concerning the enantioselective mechanism.
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Affiliation(s)
- Eric Brüllingen
- Department of Chemistry
- University of Cologne
- Organic Chemistry
- 50939 Cologne
- Germany
| | - Jörg-Martin Neudörfl
- Department of Chemistry
- University of Cologne
- Organic Chemistry
- 50939 Cologne
- Germany
| | - Bernd Goldfuss
- Department of Chemistry
- University of Cologne
- Organic Chemistry
- 50939 Cologne
- Germany
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11
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The Henry reaction catalyzed by NiII and CuII complexes bearing arylhydrazones of acetoacetanilide. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.05.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Gurbanov AV, Guedes da Silva MC, Kustov LM, Guseinov FI, Mahmudov KT, Pombeiro AJ. Nitroaldol reaction catalyzed by arylhydrazone di- and triorganotin(IV) complexes. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.09.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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13
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Zhang S, Li Y, Xu Y, Wang Z. Recent progress in copper catalyzed asymmetric Henry reaction. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Yoshizawa A, Feula A, Male L, Leach AG, Fossey JS. Rigid and concave, 2,4-cis-substituted azetidine derivatives: A platform for asymmetric catalysis. Sci Rep 2018; 8:6541. [PMID: 29695806 PMCID: PMC5916886 DOI: 10.1038/s41598-018-24784-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 11/25/2022] Open
Abstract
A series of single enantiomer, 2,4-cis-disubstituted amino azetidines were synthesised and used as ligands for copper-catalysed Henry reactions of aldehydes with nitromethane. Optimisation of ligand substituents and the reaction conditions was conducted. The enantiomeric excess of the formed products was highest when alkyl aldehydes were employed in the reaction (>99% e.e.). The absolute stereochemistry of one representative azetidine derivative salt was determined by analysis of the Flack parameter of an XRD single crystal structure. The origin of selectivity in catalysis was investigated computationally, revealing the importance of the amino-substituent in determining the stereochemical outcome. A racemic platinum complex of a cis-disubstituted azetidine is examined by XRD single crystal structure analysis with reference to its steric parameters, and analogies to the computationally determined copper complex catalyst are drawn. A preliminary example of the use of a cis-disubstituted azetidine scaffold in thiourea H-bonding catalyst is noted in the supporting information.
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Affiliation(s)
- Akina Yoshizawa
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Antonio Feula
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Louise Male
- X-Ray Crystallography Facility, School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Andrew G Leach
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK.
| | - John S Fossey
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK.
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15
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Xue Y, Wang Y, Cao Z, Zhou J, Chen ZX. Computational insight into the cooperative role of non-covalent interactions in the aza-Henry reaction catalyzed by quinine derivatives: mechanism and enantioselectivity. Org Biomol Chem 2018; 14:9588-9597. [PMID: 27714327 DOI: 10.1039/c6ob01611a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Density functional theory (DFT) calculations were performed to elucidate the mechanism and the origin of the high enantioselectivity of the aza-Henry reaction of isatin-derived N-Boc ketimine catalyzed by a quinine-derived catalyst (QN). The C-C bond formation step is found to be both the rate-determining and the stereo-controlled step. The results revealed the important role of the phenolic OH group in pre-organizing the complex of nitromethane and QN and stabilizing the in situ-generated nitronate and protonated QN. Three possible activation modes for C-C bond formation involving different coordination patterns of catalyst and substrates were studied, and it was found that both the ion pair-hydrogen bonding mode and the Brønsted acid-hydrogen bonding mode are viable, with the latter slightly preferred for the real catalytic system. The calculated enantiomeric excess (ee) favouring the S enantiomer is in good agreement with the experimental result. The high reactivity and enantioselectivity can be ascribed to the cooperative role of the multiple non-covalent interactions, including classical and non-classical H bonding as well as anionπ interactions. These results also highlight the importance of the inclusion of dispersion correction for achieving a reasonable agreement between theory and experiment for the current reaction.
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Affiliation(s)
- Yunsheng Xue
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China. and School of Pharmacy, Xuzhou Medical University, No. 209, Tongshan Road, Xuzhou, 221004, P. R. China
| | - Yuhui Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N. Zhongshan Road, Shanghai, 200062, P. R. China
| | - Zhongyan Cao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N. Zhongshan Road, Shanghai, 200062, P. R. China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N. Zhongshan Road, Shanghai, 200062, P. R. China
| | - Zhao-Xu Chen
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
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He F, Chen G, Yang J, Liang G, Deng P, Xiong Y, Zhou H. Catalytic enantioselective Henry reaction of α-keto esters, 2-acylpyridines and 2-acylpyridine N-oxides. RSC Adv 2018; 8:9414-9422. [PMID: 35541881 PMCID: PMC9078658 DOI: 10.1039/c8ra00552d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 02/19/2018] [Indexed: 12/25/2022] Open
Abstract
Asymmetric Henry reaction of ketones catalyzed by a pre-prepared Ni complex with low catalyst loading.
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Affiliation(s)
- Feilong He
- School of Pharmaceutical Science
- Chongqing Medical University
- Chongqing 400016
- PR China
| | - Guanghui Chen
- School of Pharmaceutical Science
- Chongqing Medical University
- Chongqing 400016
- PR China
| | - Junxia Yang
- School of Pharmaceutical Science
- Chongqing Medical University
- Chongqing 400016
- PR China
| | - Guojuan Liang
- School of Pharmaceutical Science
- Chongqing Medical University
- Chongqing 400016
- PR China
| | - Ping Deng
- School of Pharmaceutical Science
- Chongqing Medical University
- Chongqing 400016
- PR China
| | - Yan Xiong
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing 401331
- PR China
| | - Hui Zhou
- School of Pharmaceutical Science
- Chongqing Medical University
- Chongqing 400016
- PR China
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Karasawa T, Kumagai N, Shibasaki M. Heterogeneous Heterobimetallic Catalysis Enabling Expeditious Access to CF3-Containing vic-Amino Alcohols. Org Lett 2017; 20:308-311. [DOI: 10.1021/acs.orglett.7b03767] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tomoya Karasawa
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23
Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23
Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), Tokyo, 3-14-23
Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
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18
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The synthesis of chiral tridentate ligands from l -proline and their application in the copper(II)-catalyzed enantioselective Henry reaction. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Copper(II) arylhydrazone complexes as catalysts for C H activation in the Henry reaction in water. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.05.030] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Menapara T, Choudhary MK, Tak R, Kureshy RI, Khan NUH, Abdi SH. Recyclable chiral Cu(II) macrocyclic salen complex catalyzed enantioselective aza-Henry reaction of isatin derived N-Boc ketimines and its application for the synthesis of β-diamine. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.05.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Kaldun J, Prause F, Scharnagel D, Freitag F, Breuning M. Evaluation of 5-cis-Substituted Prolinamines as Ligands in Enantioselective, Copper-Catalyzed Henry Reactions. ChemCatChem 2016. [DOI: 10.1002/cctc.201600240] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Johannes Kaldun
- Organic Chemistry Laboratory; University of Bayreuth; Universitätsstraße 30 95447 Bayreuth Germany
| | - Felix Prause
- Organic Chemistry Laboratory; University of Bayreuth; Universitätsstraße 30 95447 Bayreuth Germany
| | - Dagmar Scharnagel
- Organic Chemistry Laboratory; University of Bayreuth; Universitätsstraße 30 95447 Bayreuth Germany
| | - Frederik Freitag
- Organic Chemistry Laboratory; University of Bayreuth; Universitätsstraße 30 95447 Bayreuth Germany
| | - Matthias Breuning
- Organic Chemistry Laboratory; University of Bayreuth; Universitätsstraße 30 95447 Bayreuth Germany
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22
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Choudhary MK, Rao Ganga VS, Menapara T, Kureshy RI, Khan NUH, Abdi SHR, Suresh E. Cascade reaction for the construction of CF3 containing tetrasubstituted furan ring. RSC Adv 2016. [DOI: 10.1039/c6ra19782e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Activated olefins are well known nucleophiles, but proton abstraction from the substituted α-methyl group in nitroolefin is rare.
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Affiliation(s)
- Manoj K. Choudhary
- Inorganic Materials and Catalysis Division
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Bhavnagar-364 002
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Venkata Subba Rao Ganga
- Inorganic Materials and Catalysis Division
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Bhavnagar-364 002
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Tusharkumar Menapara
- Inorganic Materials and Catalysis Division
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Bhavnagar-364 002
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Rukhsana I. Kureshy
- Inorganic Materials and Catalysis Division
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Bhavnagar-364 002
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Noor-ul H. Khan
- Inorganic Materials and Catalysis Division
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Bhavnagar-364 002
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Sayed H. R. Abdi
- Inorganic Materials and Catalysis Division
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Bhavnagar-364 002
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Eringathodi Suresh
- Academy of Scientific and Innovative Research (AcSIR)
- Central Salt and Marine Chemicals Research Institute (CSMCRI)
- Council of Scientific & Industrial Research (CSIR)
- Bhavnagar-364 002
- India
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l-Proline derived arylmethanamine ligands and their application in the copper-catalyzed asymmetric Henry reaction: a rare example of a Cu-complex with a dicopper tetraacetate core. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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