1
|
Wolińska E, Rozbicki P, Branowska D. Chiral pyridine oxazoline and 1,2,4-triazine oxazoline ligands incorporating electron-withdrawing substituents and their application in the Cu-catalyzed enantioselective nitroaldol reaction. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02893-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
AbstractEight pyridine-containing and four 1,2,4-triazine-containing chiral oxazoline ligands incorporating electron-withdrawing substituents have been synthesized by two-step route including Buchwald–Hartwig amination. Enantio-inducing activity of the ligands has been assessed in the copper-catalyzed asymmetric nitroaldol reactions and the influence of the electron-withdrawing substituents on the ligands' activity has been investigated.
Graphical abstract
Collapse
|
2
|
Wolińska E, Wysocki W, Branowska D, Karczmarzyk Z. Synthesis and structures of three new pyridine-containing oxazoline ligands of complexes for asymmetric catalysis. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2021; 77:529-536. [PMID: 34482296 DOI: 10.1107/s2053229621008202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 08/10/2021] [Indexed: 11/11/2022]
Abstract
Three new chiral pyridine-containing oxazoline derivatives with fluorine and perfluoromethyl groups, namely, 2-({2-[(4S)-4-phenyl-4,5-dihydro-1,3-oxazol-2-yl]phenyl}amino)-5-(trifluoromethyl)pyridine, C21H16F3N3O, 2-({5-fluoro-2-[(4S)-4-isopropyl-4,5-dihydro-1,3-oxazol-2-yl]phenyl}amino)-5-(trifluoromethyl)pyridine, C18H17F4N3O, and 2-({2-[(3aR,8aS)-8,8a-dihydro-3aH-indeno[1,2-d]oxazol-2-yl]phenyl}amino)-5-(trifluoromethyl)pyridine, C22H16F3N3O, as chiral ligands in metal-catalysed asymmetric reactions, were synthesized and characterized by spectral and X-ray diffraction methods. The conformation of the molecules is influenced by strong N-H...N hydrogen bonding and weak C-H...X (X = O and N) interactions. There are no intermolecular hydrogen bonds in the crystal structures of the analysed compounds. Hirshfeld surface analysis showed that the H...H contacts constitute a high percentage of the intermolecular interactions. The conformational analysis was performed by theoretical calculations using the density functional theory (DFT) method. The mechanism of complex formation in terms of the electron-withdrawing effect of the substituents on the oxazoline ring and the ligand conformation is discussed.
Collapse
Affiliation(s)
- Ewa Wolińska
- Faculty of Science, University of Natural Sciences and Humanities in Siedlce, 3-Maja 54, 08-110 Siedlce, Poland
| | - Waldemar Wysocki
- Faculty of Science, University of Natural Sciences and Humanities in Siedlce, 3-Maja 54, 08-110 Siedlce, Poland
| | - Danuta Branowska
- Faculty of Science, University of Natural Sciences and Humanities in Siedlce, 3-Maja 54, 08-110 Siedlce, Poland
| | - Zbigniew Karczmarzyk
- Faculty of Science, University of Natural Sciences and Humanities in Siedlce, 3-Maja 54, 08-110 Siedlce, Poland
| |
Collapse
|
3
|
Rénio MR, Sousa FJ, Tavares NC, Valente AJ, Silva Serra ME, Murtinho D. (3
S
,4
S
)‐
N
‐substituted‐3,4‐dihydroxypyrrolidines as ligands for the enantioselective Henry reaction. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Márcia R.R. Rénio
- CQC and Department of Chemistry University of Coimbra Coimbra 3004‐535 Portugal
| | | | - Nélia C.T. Tavares
- CQC and Department of Chemistry University of Coimbra Coimbra 3004‐535 Portugal
| | - Artur J.M. Valente
- CQC and Department of Chemistry University of Coimbra Coimbra 3004‐535 Portugal
| | | | - Dina Murtinho
- CQC and Department of Chemistry University of Coimbra Coimbra 3004‐535 Portugal
| |
Collapse
|
4
|
Premkumar M, Kaleeswaran D, Kaviyarasan G, Prasanth DA, Venkatachalam G. Mono and Dinuclear Cu(II) Carboxylate Complexes with Pyridine and 1‐methylimidazole as Co–Ligands: Synthesis, Structure, Antibacterial Activity and Catalytic Nitroaldol Reactions. ChemistrySelect 2019. [DOI: 10.1002/slct.201901078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Muniyappan Premkumar
- PG & Research Department of ChemistryGovernment Arts College Dharmapuri- 636 705, Tamilnadu India
| | - Dhananjayan Kaleeswaran
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai- 400 076, Maharashtra India
| | - Govindaraj Kaviyarasan
- Department of MicrobiologySchool of BioSciencePeriyar University Salem- 636 011, Tamilnadu India
| | - Dorairaj Arvind Prasanth
- Department of MicrobiologySchool of BioSciencePeriyar University Salem- 636 011, Tamilnadu India
| | - Galmari Venkatachalam
- PG & Research Department of ChemistryGovernment Arts College Dharmapuri- 636 705, Tamilnadu India
| |
Collapse
|
5
|
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]
|
6
|
Levopimaric acid derived 1,2-diamines and their application in the copper-catalyzed asymmetric Henry reaction. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.11.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Bozzini LA, Batista JH, de Mello MB, Vessecchi R, Clososki GC. Selective functionalization of cyano-phenyl-2-oxazolines using TMPMgCl·LiCl. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
8
|
Li S, Li D, Xiao T, Zhang S, Song Z, Ma H. Design, Synthesis, Fungicidal Activity, and Unexpected Docking Model of the First Chiral Boscalid Analogues Containing Oxazolines. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:8927-8934. [PMID: 27792876 DOI: 10.1021/acs.jafc.6b03464] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Chirality greatly influences the biological and pharmacological properties of a pesticide and will contribute to unnecessary environmental loading and undesired ecological impact. No structure and activity relationship (SAR) of enantiopure succinate dehydrogenase inhibitors (SDHIs) was documented during the structure optimization of boscalids. On the basis of commercial SDHIs, oxazoline natural products, and versatile oxazoline ligands in organic synthesis, the first effort was devoted to explore the chiral SDHIs and the preliminary mechanism thereof. Fine-tuning furnished chiral nicotinamides 4ag as a more promising fungicidal candidate against Rhizoctonia solani, Botrytis cinerea, and Sclerotinia sclerotiorum, with EC50 values of 0.58, 0.42, and 2.10 mg/L, respectively. In vivo bioassay and molecular docking were investigated to explore the potential in practical application and plausible novelty in action mechanism, respectively. The unexpected molecular docking model showed the different chiral effects on the binding site with the amino acid residues. This chiral nicotinamide also featured easy synthesis and cost-efficacy. It will provide a powerful complement to the commercial SDHI fungicides with the introduction of chirality.
Collapse
Affiliation(s)
- Shengkun Li
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University , Weigang 1, Xuanwu District, Nanjing, Jiangsu 210095, People's Republic of China
| | - Dangdang Li
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University , Weigang 1, Xuanwu District, Nanjing, Jiangsu 210095, People's Republic of China
| | - Taifeng Xiao
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University , Weigang 1, Xuanwu District, Nanjing, Jiangsu 210095, People's Republic of China
| | - ShaSha Zhang
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University , Weigang 1, Xuanwu District, Nanjing, Jiangsu 210095, People's Republic of China
| | - Zehua Song
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University , Weigang 1, Xuanwu District, Nanjing, Jiangsu 210095, People's Republic of China
| | - Hongyu Ma
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University , Weigang 1, Xuanwu District, Nanjing, Jiangsu 210095, People's Republic of China
| |
Collapse
|
9
|
Boobalan R, Chang YM, Chen C, Lee GH. Copper Complex of Pinene based Schiff base [CuSBADBH]2: Synthesis and its Application in Catalytic Asymmetric Nitroaldol (Henry) Reaction. ChemistrySelect 2016. [DOI: 10.1002/slct.201600359] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ramalingam Boobalan
- Department of Chemistry; National Dong Hwa University; Soufeng Hualien 974 Taiwan
| | - You-Ming Chang
- Department of Chemistry; National Dong Hwa University; Soufeng Hualien 974 Taiwan
| | - Chinpiao Chen
- Department of Chemistry; National Dong Hwa University; Soufeng Hualien 974 Taiwan
- Department of Nursing; Tzu Chi University of Science and Technology; Hualien 970 Taiwan
| | - Gene-Hsian Lee
- Instrumentation Center; College of Science; National Taiwan University; Taipei 106 Taiwan
| |
Collapse
|
10
|
Chiral oxazoline ligands with two different six-membered azaheteroaromatic rings – synthesis and application in the Cu-catalyzed nitroaldol reaction. HETEROCYCL COMMUN 2016. [DOI: 10.1515/hc-2016-0001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
AbstractSynthesis and catalytic activity of chiral ligands 5,6-diphenyl-3-{3-[(4S/R)-4-R/Ar-4,5-dihydro-1,3-oxazol-2-yl]pyridin-2-yl}amino-1,2,4-triazines 2 and their analogs 3 possessing an N-oxide function in the pyridine ring are described. The pivotal step in the synthesis of ligands 2 is the Buchwald-Hartwig Pd-catalyzed cross-coupling reaction between 3-bromo-5,6-diphenyl-1,2,4-triazine (7a) and enantiopure 3-(4,5-dihydro-1,3-oxazol-2-yl)pyridin-2-amines 6a–d. Aromatic nucleophilic substitution of chlorine in 3-chloro-5,6-diphenyl-1,2,4-triazine (7b) with 3-(4,5-dihydro-1,3-oxazol-2-yl)pyridin-2-amine 1-oxides 12 was investigated as the key reaction in the synthesis of ligands 3. Two undesired derivatives 13 or 14, resulting from unexpected reactions of 3, were isolated depending on reaction conditions. Compounds 2 and 3 as well as the side products 13 and 14 were screened as chiral ligands in the copper catalyzed enatioselective nitroaldol reaction.
Collapse
|
11
|
Wolińska E, Karczmarzyk Z, Wysocki W. Structural characterization of copper complexes with chiral 1,2,4-triazine-oxazoline ligands. HETEROCYCL COMMUN 2016. [DOI: 10.1515/hc-2016-0103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
AbstractThe crystal structure determination of oxazoline-1,2,4-triazine ligand
Collapse
|
12
|
A study of chiral oxazoline ligands with a 1,2,4-triazine and other six-membered aza-heteroaromatic rings and their application in Cu-catalysed asymmetric nitroaldol reactions. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|