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Tan LY, Lim FPL, Wong S, Chuah LH, Frontera A, Tiekink ERT, Dolzhenko AV. 5-Aza-adenine Derivatives for Crop-Protection: Multicomponent Synthesis, Experimental and Theoretical Structural Analysis. Chempluschem 2024; 89:e202400127. [PMID: 38924361 DOI: 10.1002/cplu.202400127] [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: 06/11/2024] [Revised: 05/20/2024] [Accepted: 06/26/2024] [Indexed: 06/28/2024]
Abstract
A microwave-assisted synthesis of 7-amino-1,2,4-triazolo[1,5-a][1,3,5]triazine-2-propanamides was developed using a three-component, catalyst-free reaction of cyanamide and trimethyl orthoformate with 3-(5-amino-1H-1,2,4-triazol-3-yl)propanamides (3). The reaction tolerated structurally diverse substrates and proceeded chemo- and regio-selectively, affording the target compounds in high purity in 5-10 minutes. The convenient chromatography-free isolation and purification of the products add practicality to this method. The structural features of the prepared compounds were investigated using dynamic NMR spectroscopy, X-ray crystallography and computational chemistry calculations. X-ray crystallography performed on a representative compound, 3-(7-amino-1,2,4-triazolo[1,5-a][1,3,5]triazin-2-yl)-N-(4-benzyl)propanamide (4 l), showed the overall molecular conformation to adopt the shape of the letter C. Notable localisation of π-electron density is found within the 1,2,4-triazolo[1,5-a][1,3,5]triazine system; a relatively short C-NH2 bond is consistent with restricted rotation about this bond. This study also presents a detailed analysis of the molecular interactions in 4 l using DFT and QTAIM methods with a focus on the hydrogen-bonding and π-stacking interactions that influence the molecular packing of 4 l. The findings reveal the significant roles of N-H⋅O, N-H⋅N and C-H⋅N interactions, along with electrostatically enhanced π⋅π contacts. A broad screening for insecticidal, fungicidal and herbicidal properties identified several compounds with potent herbicidal activity against Matricaria inodora.
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Affiliation(s)
- Lin Yuing Tan
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor Darul Ehsan, 47500, Malaysia
| | - Felicia Phei Lin Lim
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor Darul Ehsan, 47500, Malaysia
| | - Sheryn Wong
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor Darul Ehsan, 47500, Malaysia
| | - Lay Hong Chuah
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor Darul Ehsan, 47500, Malaysia
| | - Antonio Frontera
- Department of Chemistry, Universitat de les Illes Balears, Crta de Valldemossa km 7.5, 07122, Palma de Mallorca, Spain
| | - Edward R T Tiekink
- Department of Chemistry, Universitat de les Illes Balears, Crta de Valldemossa km 7.5, 07122, Palma de Mallorca, Spain
| | - Anton V Dolzhenko
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor Darul Ehsan, 47500, Malaysia
- Curtin Medical School, Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University, GPO Box U1987, Perth, Western Australia, 6845, Australia
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2
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Siutkina A, Kalinina S, Liu R, Heitman LH, Junker A, Daniliuc CG, Kalinin DV. Microwave-Assisted Synthesis, Structure, and Preliminary Biological Evaluation of Novel 6-Methoxy-5,6-dihydro-5-azapurines. ACS OMEGA 2023; 8:14097-14112. [PMID: 37091407 PMCID: PMC10116508 DOI: 10.1021/acsomega.3c00765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/10/2023] [Indexed: 05/03/2023]
Abstract
We herein disclose the microwave-assisted synthesis of previously unreported 6-methoxy-5,6-dihydro-5-azapurines, whose purine-like scaffold is promising for drug discovery. The method is simple, fast, and relies on easily accessible reagents such as trimethyl orthoformate, acetic acid, and aminotriazole-derived N,N'-disubstituted formamidines. The preliminary biological evaluation revealed that selected representatives of synthesized 6-methoxy-5,6-dihydro-5-azapurines dose-dependently reduce the viability of HepG2 and A549 cancer cells having little to no influence on five tested purinergic receptors.
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Affiliation(s)
- Alena
I. Siutkina
- Institute
of Pharmaceutical and Medicinal Chemistry, University of Münster, 48149 Münster, Germany
| | - Svetlana Kalinina
- Institute
of Food Chemistry, University of Münster, 48149 Münster, Germany
| | - Rongfang Liu
- Leiden
Academic Centre for Drug Research (LACDR), Division of Drug Discovery
and Safety, Leiden University, 2333 CC Leiden, The Netherlands
| | - Laura H. Heitman
- Leiden
Academic Centre for Drug Research (LACDR), Division of Drug Discovery
and Safety, Leiden University, 2333 CC Leiden, The Netherlands
| | - Anna Junker
- European
Institute for Molecular Imaging (EIMI), University of Münster, 48149 Münster, Germany
| | | | - Dmitrii V. Kalinin
- Institute
of Pharmaceutical and Medicinal Chemistry, University of Münster, 48149 Münster, Germany
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3
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Wu J, Wang Z, Wang C, Wang Y, Li H, Luo H, Li H, Wang F, Li D, Yang J. Research Progress on the Synthesis of Nitrogen-Containing Compounds with Cyanamide as a Building Block. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202208020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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4
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Ganai AM, Pathan TK, Sayyad N, Kushwaha B, Kushwaha ND, Tzakos AG, Karpoormath R. DBU mediated one-pot synthesis of triazolo triazines via Dimroth type rearrangement. RSC Adv 2022; 12:2102-2106. [PMID: 35425261 PMCID: PMC8979044 DOI: 10.1039/d1ra07749j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/11/2021] [Indexed: 11/21/2022] Open
Abstract
Herein we report an efficient one-pot synthesis of [1,2,4]triazolo[1,5 a][1,3,5]triazines from commercially available substituted aryl/heteroaryl aldehydes and substituted 2-hydrazinyl-1,3,5-triazines via N-bromosuccinimide (NBS) mediated oxidative C–N bond formation. Isomerisation of [1,2,4]triazolo[4,3-a][1,3,5]triazines to [1,2,4]triazolo[1,5-a][1,3,5]triazines is driven by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) affording both isomers with good to excellent yields (70–96%). We demonstrate a simple yet efficient one-pot synthesis of two triazolotriazine isomers via DBU mediated Dimroth type rearrangement with excellent yields.![]()
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Affiliation(s)
- Ab Majeed Ganai
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Tabasum Khan Pathan
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Nisar Sayyad
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Babita Kushwaha
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Narva Deshwar Kushwaha
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Andreas G Tzakos
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina Ioannina 45110 Greece
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville) Durban 4000 South Africa
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5
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Fused Heterocyclic Systems with an s-Triazine Ring. 34. Development of a Practical Approach for the Synthesis of 5-Aza-isoguanines. Molecules 2019; 24:molecules24081453. [PMID: 31013786 PMCID: PMC6514761 DOI: 10.3390/molecules24081453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 11/29/2022] Open
Abstract
Purine isosteres present excellent opportunities in drug design and development. Using isosteres of natural purines as scaffolds for the construction of new therapeutic agents has been a valid strategy of medicinal chemistry. Inspired by the similarity to isoguanine, we attempted to develop a practical method for the preparation of 5-aza-isoguanines. Several synthetic approaches were explored to establish a robust general protocol for the preparation of these compounds. The significant difference in the reactivity of the C-5 and C-7 electrophilic centers of 1,2,4-triazolo[1,5-a][1,3,5]triazines (5-azapurines) towards nucleophiles was demonstrated. The most practical and general method for the preparation of 5-aza-isoguanines involved a regioselective reaction of ethoxycarbonyl isothiocyanate with a 5-aminotriazole. The intramolecular ring closure of the resulted product followed by the S-methylation afforded 7-methylthio-2-phenyl-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-one, which could be effectively aminated with various amines. The resulted 5-aza-isoguanines resemble a known purine nucleoside phosphorylase inhibitor and could be interesting for further investigations as potential anticancer agents.
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Lim FPL, Tan KC, Luna G, Tiekink ER, Dolzhenko AV. A new practical synthesis of 3-amino-substituted 5-aminopyrazoles and their tautomerism. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.003] [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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Lim FPL, Tan LY, Tiekink ERT, Dolzhenko AV. A one-pot, multicomponent reaction for the synthesis of novel 2-alkyl substituted 4-aminoimidazo[1,2- a][1,3,5]triazines. RSC Adv 2018; 8:21495-21504. [PMID: 35539915 PMCID: PMC9080918 DOI: 10.1039/c8ra03703e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/03/2018] [Indexed: 02/02/2023] Open
Abstract
A highly selective, one-pot, three-component synthesis of novel 2-alkyl-substituted 4-aminoimidazo[1,2-a][1,3,5]triazines has been developed. The scope of the method was explored in two dimensions, varying the structures of trialkyl orthoesters and 2-aminoimidazoles in their reactions with cyanamide. Conveniently performed under microwave irradiation, this method was also proved to be efficient under conventional heating. A library of 24 novel compounds was prepared in high purity using this multicomponent approach. Molecular and crystal structures of representative molecules were studied using X-ray crystallography.
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Affiliation(s)
- Felicia Phei Lin Lim
- School of Pharmacy, Monash University Malaysia Jalan Lagoon Selatan, Bandar Sunway Selangor Darul Ehsan 47500 Malaysia +60-3-5514-6364 +60-3-5514-5867
| | - Lin Yuing Tan
- School of Pharmacy, Monash University Malaysia Jalan Lagoon Selatan, Bandar Sunway Selangor Darul Ehsan 47500 Malaysia +60-3-5514-6364 +60-3-5514-5867
| | - Edward R T Tiekink
- Research Centre for Crystalline Materials, School of Science and Technology, Sunway University Bandar Sunway Selangor Darul Ehsan 47500 Malaysia
| | - Anton V Dolzhenko
- School of Pharmacy, Monash University Malaysia Jalan Lagoon Selatan, Bandar Sunway Selangor Darul Ehsan 47500 Malaysia +60-3-5514-6364 +60-3-5514-5867
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University GPO Box U1987 Perth Western Australia 6845 Australia
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8
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A new microwave-assisted, three-component reaction of 5-aminopyrazole-4-carboxylates: Selective synthesis of substituted 5-aza-9-deaza-adenines. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Lim FPL, Tan LY, Tiekink ERT, Dolzhenko A. Synthesis of 3-(5-amino-1H-1,2,4-triazol-3-yl)propanamides and their tautomerism. RSC Adv 2018; 8:22351-22360. [PMID: 35539716 PMCID: PMC9081160 DOI: 10.1039/c8ra04576c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 06/12/2018] [Indexed: 12/11/2022] Open
Abstract
Two complementary pathways for the preparation of N-substituted 3-(5-amino-1H-1,2,4-triazol-3-yl)propanamides (5) were proposed and successfully realized in the synthesis of 20 representative examples. These methods use the same types of starting materials viz. succinic anhydride, aminoguanidine hydrochloride, and a variety of amines. The choice of the pathway and sequence of the introduction of reagents to the reaction depended on the amine nucleophilicity. The first pathway started with the preparation of N-guanidinosuccinimide, which then reacted with amines under microwave irradiation to afford 5. The desired products were successfully obtained in the reaction with aliphatic amines (primary and secondary) via a nucleophilic opening of the succinimide ring and the subsequent recyclization of the 1,2,4-triazole ring. This approach however failed when less nucleophilic aromatic amines were used. Therefore, an alternative pathway, with the initial preparation of N-arylsuccinimides and their subsequent reaction with aminoguanidine hydrochloride under microwave irradiation, was applied. The annular prototropic tautomerism in the prepared 1,2,4-triazoles 5 was studied using NMR spectroscopy and X-ray crystallography. Two complementary pathways for the preparation of N-substituted 3-(5-amino-1H-1,2,4-triazol-3-yl)propanamides were proposed and successfully realized in the synthesis of 20 representative examples.![]()
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Affiliation(s)
| | - Lin Yuing Tan
- School of Pharmacy
- Monash University Malaysia
- Selangor Darul Ehsan 47500
- Malaysia
| | - Edward R. T. Tiekink
- Research Centre for Crystalline Materials
- School of Science and Technology
- Sunway University
- Selangor Darul Ehsan 47500
- Malaysia
| | - Anton V. Dolzhenko
- School of Pharmacy
- Monash University Malaysia
- Selangor Darul Ehsan 47500
- Malaysia
- School of Pharmacy and Biomedical Sciences
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10
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11
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Lim FPL, Low ST, Ho ELK, Halcovitch NR, Tiekink ERT, Dolzhenko AV. A multicomponent reaction of 2-aminoimidazoles: microwave-assisted synthesis of novel 5-aza-7-deaza-adenines. RSC Adv 2017. [DOI: 10.1039/c7ra11305f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient and highly selective multicomponent synthesis of 4-aminoimidazo[1,2-a]triazines, which are 5-aza-7-deaza-isosteres of adenine, was developed.
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Affiliation(s)
| | - Szy Teng Low
- School of Pharmacy
- Monash University Malaysia
- Bandar Sunway
- Malaysia
| | | | | | - Edward R. T. Tiekink
- Research Centre for Crystalline Materials
- School of Science and Technology
- Sunway University
- Bandar Sunway
- Malaysia
| | - Anton V. Dolzhenko
- School of Pharmacy
- Monash University Malaysia
- Bandar Sunway
- Malaysia
- School of Pharmacy
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12
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A one-pot, three-component, microwave-assisted synthesis of novel 7-amino-substituted 4-aminopyrazolo[1,5-a][1,3,5]triazine-8-carbonitriles. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.11.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Dolzhenko AV, Tan BJ, Chiu GNC, Chui WK, Dolzhenko AV. Synthesis and biological activity of fluorinated 7-benzylamino-2-phenyl-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amines. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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Zavodskaya AV, Bakharev VV, Parfenov VE, Gidaspov AA, Slepukhin PA, Isenov ML, Eltsov OS. Synthesis of new 5-aza-isosteres of guanine containing aryl and hetaryl substituents on the 1,2,4-triazole ring. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Lim FPL, Luna G, Dolzhenko AV. A one-pot, three-component aminotriazine annulation onto 5-aminopyrazole-4-carbonitriles under microwave irradiation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lim FPL, Dolzhenko AV. 4-Amino-substituted pyrazolo[1,5-a][1,3,5]triazin-2-amines: a new practical synthesis and biological activity. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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17
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Bakharev VV, Parfenov VE, Ul'yankina IV, Zavodskaya AV, Selezneva EV, Gidaspov AA, Eltsov OS, Slepukhin PA. Synthesis of new 5-aza-isosteres of guanine—5-aminosubstituted 1,2,4-triazolo[1,5-a]-1,3,5-triazin-7-ones. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Kalinina SA, Kalinin DV, Dolzhenko AV. A one-pot, three-component, microwave-promoted synthesis of 2-amino-substituted 7-amino-1,2,4-triazolo[1,5-a][1,3,5]triazines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.158] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Dolzhenko AV, Kalinina SA, Kalinin DV. A novel multicomponent microwave-assisted synthesis of 5-aza-adenines. RSC Adv 2013. [DOI: 10.1039/c3ra41932k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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