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In Melting Points We Trust: A Review on the Misguiding Characterization of Multicomponent Reactions Adducts and Intermediates. Molecules 2022; 27:molecules27217552. [DOI: 10.3390/molecules27217552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/25/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022] Open
Abstract
We discuss herein the problems associated with using melting points to characterize multicomponent reactions’ (MCRs) products and intermediates. Although surprising, it is not rare to find articles in which these MCRs final adducts (or their intermediates) are characterized solely by comparing melting points with those available from other reports. A brief survey among specialized articles highlights serious and obvious problems with this practice since, for instance, cases are found in which as many as 25 quite contrasting melting points have been attributed to the very same MCR adduct. Indeed, it seems logical to assume that the inherent non-confirmatory nature of melting points could be vastly misleading as a protocol for structural confirmation, but still many publications (also in the Q1 and Q2 quartiles) insist on using it. This procedure contradicts best practices in organic synthesis, and articles fraught with limitations and misleading conclusions have been published in the MCRs field. The drawbacks inherent to this practice are indeed serious and have misguided MCRs advances. We therefore suggest some precautions aimed at avoiding future confusions.
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2
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do Nascimento LG, Dias IM, de Souza GBM, Mourão LC, Pereira MB, Viana JCV, Lião LM, de Oliveira GR, Alonso CG. Sulfonated carbons from agro-industrial residues: simple and efficient catalysts for the Biginelli reaction. NEW J CHEM 2022. [DOI: 10.1039/d1nj04686a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An eco-friendly catalyst prepared from rice husk was used to synthesize dihydropyrimidinones (DHPMs) and achieved a yield of 92%.
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Affiliation(s)
| | - Isabela Milhomem Dias
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
| | - Guilherme Botelho Meireles de Souza
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
- Chemical Engineering Department, State University of Maringá, CEP 87020-900 Maringá, Paraná, Brazil
| | | | - Mariana Bisinotto Pereira
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
- Chemical Engineering Department, State University of Maringá, CEP 87020-900 Maringá, Paraná, Brazil
| | - Júlio Cezár Vieira Viana
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
- Federal University of Tocantins, CEP 77404-970, Gurupi, Tocantins, Brazil
| | - Luciano Morais Lião
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
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Botta L, Cesarini S, Zippilli C, Bizzarri BM, Fanelli A, Saladino R. Multicomponent reactions in the synthesis of antiviral compounds. Curr Med Chem 2021; 29:2013-2050. [PMID: 34620058 DOI: 10.2174/0929867328666211007121837] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 07/16/2021] [Accepted: 08/18/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Multicomponent reactions are one-pot processes for the synthesis of highly functionalized hetero-cyclic and hetero-acyclic compounds, often endowed with biological activity. OBJECTIVE Multicomponent reactions are considered green processes with high atom economy. In addition, they present advantages compared to the classic synthetic methods such as high efficiency and low wastes production. METHOD In these reactions two or more reagents are combined together in the same flask to yield a product containing almost all the atoms of the starting materials. RESULTS The scope of this review is to present an overview of the application of multicomponent reactions in the synthesis of compounds endowed with antiviral activity. The syntheses are classified depending on the viral target. CONCLUSION Multicomponent reactions can be applied to all the stages of the drug discovery and development process making them very useful in the search for new agents active against emerging (viral) pathogens.
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Affiliation(s)
- Lorenzo Botta
- Department Biological and Ecological Sciences, University of Tuscia, Viterbo. Italy
| | - Silvia Cesarini
- Department Biological and Ecological Sciences, University of Tuscia, Viterbo. Italy
| | - Claudio Zippilli
- Department Biological and Ecological Sciences, University of Tuscia, Viterbo. Italy
| | | | - Angelica Fanelli
- Department Biological and Ecological Sciences, University of Tuscia, Viterbo. Italy
| | - Raffaele Saladino
- Department Biological and Ecological Sciences, University of Tuscia, Viterbo. Italy
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Kardooni R, Kiasat AR. Polyethylene Glycol as a Green and Biocompatible Reaction Media for the Catalyst Free Synthesis of Organic Compounds. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200605161840] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Replacing harmful organic solvents that caused environmental pollution with an alternative medium for the development of ideal synthetic strategies is one of the primary focal points of green chemistry. Utilizing polyethylene glycol (PEG) as a nonvolatile solvent and promotor for the evaluation of safe processes has made a considerable contribution to the reduction of pollution problems. The current review summarizes the recent well-known catalyst-free organic reaction performed in polyethylene glycol as a green and biocompatible reaction medium.
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Affiliation(s)
- Rezvan Kardooni
- Chemistry Department, College of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Ali Reza Kiasat
- Chemistry Department, College of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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do Nascimento LG, Dias IM, Meireles de Souza GB, Dancini-Pontes I, Fernandes NRC, de Souza PS, Roberto de Oliveira G, Alonso CG. Niobium Oxides as Heterogeneous Catalysts for Biginelli Multicomponent Reaction. J Org Chem 2020; 85:11170-11180. [PMID: 32786650 DOI: 10.1021/acs.joc.0c01167] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This study reports a simple, reusable, and recoverable niobium-based heterogeneous catalysts for Biginelli multicomponent reactions. Different methods of catalysts preparation were investigated. For this purpose, HY-340 (Nb2O5·nH2O) and Nb2O5 were chemically and/or thermally treated and investigated as catalysts for dihydropyrimidinones (DHPMs) production. The catalysts were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, temperature-programmed desorption of NH3, adsorption/desorption of N2 at -196 °C, and thermogravimetric and differential thermal analysis. The characterization results showed that niobium oxides have the potential to be used as catalysts because of high crystallinity and large surface area. Among the tested catalysts, Nb2O5 chemically treated (Nb2O5/T) showed the best catalytic performance. In the absence of solvents, 94% yield of DHPMs was achieved. Also, Nb2O5/T can be reused three times without a significant yield decrease. Additionally, a feasible reaction pathway was suggested based on the Knoevenagel mechanism for DHPM synthesis using niobium-based catalysts.
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Affiliation(s)
| | - Isabela Milhomem Dias
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
| | | | - Isabela Dancini-Pontes
- Chemical Engineering Department, State University of Maringá, CEP 87020-900 Maringá, Paraná, Brazil
| | | | - Paulo Sérgio de Souza
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
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Padmavathy K, Krishnan KG, Kumar CU, Sutha P, Sivaramakarthikeyan R, Ramalingan C. Synthesis, Antioxidant Evaluation, Density Functional Theory Study of Dihydropyrimidine Festooned Phenothiazines. ChemistrySelect 2018. [DOI: 10.1002/slct.201800748] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Krishnaraj Padmavathy
- Department of ChemistrySchool of Advanced Sciences (SAS)Kalasalingam Academy of Research and Education (Deemed to be University) Krishnankoil – 626 126 Tamilnadu India
| | - Kannan Gokula Krishnan
- Department of ChemistrySchool of Advanced Sciences (SAS)Kalasalingam Academy of Research and Education (Deemed to be University) Krishnankoil – 626 126 Tamilnadu India
| | - Chandran Udhaya Kumar
- Department of ChemistrySchool of Advanced Sciences (SAS)Kalasalingam Academy of Research and Education (Deemed to be University) Krishnankoil – 626 126 Tamilnadu India
| | - Peramasivan Sutha
- Department of ChemistrySchool of Advanced Sciences (SAS)Kalasalingam Academy of Research and Education (Deemed to be University) Krishnankoil – 626 126 Tamilnadu India
| | - Ramar Sivaramakarthikeyan
- Department of ChemistrySchool of Advanced Sciences (SAS)Kalasalingam Academy of Research and Education (Deemed to be University) Krishnankoil – 626 126 Tamilnadu India
| | - Chennan Ramalingan
- Department of ChemistrySchool of Advanced Sciences (SAS)Kalasalingam Academy of Research and Education (Deemed to be University) Krishnankoil – 626 126 Tamilnadu India
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7
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Safaei-Ghomi J, Tavazo M, Mahdavinia GH. Ultrasound promoted one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones using dendrimer-attached phosphotungstic acid nanoparticles immobilized on nanosilica. ULTRASONICS SONOCHEMISTRY 2018; 40:230-237. [PMID: 28946420 DOI: 10.1016/j.ultsonch.2017.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/08/2017] [Accepted: 07/08/2017] [Indexed: 05/09/2023]
Abstract
A highly efficient and improved synthetic methodology for the preparation of 3,4-dihydropyrimidin-2(1H)-ones and thiones in the Biginelli reaction by condensation of β-dicarbonyl compounds, urea/thiourea and aromatic aldehydes using Dendrimer-PWAn as a nanocatalyst under ultrasonic irradiation is reported. Compared with classical Biginelli reaction conditions, this new method has the advantage of easy reaction condition, short reaction time, excellent yields, recyclable green catalyst, reduced environmental impacts and absence of any tedious workup or purification. The catalyst can be easily recovered by filtration and reused for eight consecutive reaction cycles without significant loss of activity. Also, SEM and DLS images of the catalyst after reaction cycle were investigated.
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Affiliation(s)
- Javad Safaei-Ghomi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O. Box 87317-51167, Islamic Republic of Iran.
| | - Maryam Tavazo
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O. Box 87317-51167, Islamic Republic of Iran
| | - Gholam Hossein Mahdavinia
- Department of Chemistry, Marvdasht Branch, Islamic Azad University, Marvdasht, Islamic Republic of Iran
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Andraos J. A new paradigm for designing ring construction strategies for green organic synthesis: implications for the discovery of multicomponent reactions to build molecules containing a single ring. Beilstein J Org Chem 2016; 12:2420-2442. [PMID: 28144310 PMCID: PMC5238618 DOI: 10.3762/bjoc.12.236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 10/26/2016] [Indexed: 11/23/2022] Open
Abstract
A new way of developing novel synthesis strategies for the construction of monocyclic rings found in organic molecules is presented. The method is based on the visual application of integer partitioning to chemical structures. Two problems are addressed: (1) the determination of the total number of possible ways to construct a given ring by 2-, 3-, and 4-component couplings; and (2) the systematic enumeration of those possibilities. The results of the method are illustrated using cyclohexanone, pyrazole, and the Biginelli adduct as target ring systems with a view to discover new and greener strategies for their construction using multicomponent reactions. The application of the method is also extended to various heterocycles found in many natural products and pharmaceuticals.
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Affiliation(s)
- John Andraos
- CareerChem, 504-1129 Don Mills Road, Toronto, ON M3B 2W4 Canada
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9
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Murthy Y, Rajack A, Yuvaraj K. Solvent free synthesis of 3,4-dihydropyrimidine-2-(1H)-ones/thiones catalyzed by N,O-bis(trimethylsilyl)acetamide and dicyclohexyl carbodimide. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2012.04.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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10
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Khandan-Barani K, Kangani M, Mirbaluchzehi M, Siroos Z. Synthesis of tetrahydrobenzo[b]pyran and 3,4-dihydropyrimidinone derivatives using glutamic acid as an efficient catalyst. INORG NANO-MET CHEM 2016. [DOI: 10.1080/15533174.2016.1212233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Mehrnoosh Kangani
- Department of Chemistry, Islamic Azad University, Zahedan Branch, Zahedan, Iran
| | | | - Zahra Siroos
- Department of Chemistry, Islamic Azad University, Zahedan Branch, Zahedan, Iran
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11
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Synthesis of 1-alkyl triazolium triflate room temperature ionic liquids and their catalytic studies in multi-component Biginelli reaction. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0919-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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12
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Aqua-mediated one-pot synthesis of Biginelli dihydropyrimidinone/thiones (DHPMs), Hantzsch dihydropyridines (DHPs), and polysubstituted pyridines sonocatalyzed by metal-supported nanocatalysts. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0734-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Jayalakshmi LN, Karuppasamy A, Stalindurai K, Sivaramakarthikeyan R, Devadoss V, Ramalingan C. A Mechanochemical Approach for the Construction of Carbon–Carbon Double Bonds: Efficient Syntheses of Aryl/Heteroaryl/Aliphatic Acrylates and Nitriles. Catal Letters 2015. [DOI: 10.1007/s10562-015-1515-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Jayalakshmi L, Ramalingan C, Sridhar B, Selvanayagam S. Crystal structure of 1-(2,4-di-methyl-phen-yl)urea. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:o60-1. [PMID: 25705510 PMCID: PMC4331890 DOI: 10.1107/s2056989014027431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 12/16/2014] [Indexed: 11/24/2022]
Abstract
In the title urea derivative, C9H12N2O, the dihedral angle between the benzene ring and the mean plane of the urea group, N—C(=O)—N, is 86.6 (1)°. In the crystal, the urea O atom is involved in three N—H⋯O hydrogen bonds. Molecules are linked via pairs of N—H⋯O hydrogen bonds, forming inversion dimers with an R22(8) ring motif. The dimers are linked by further N—H⋯O hydrogen bonds, forming two-dimensional networks lying parallel to (100).
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Affiliation(s)
- L Jayalakshmi
- Department of Chemistry, Kalasalingam University, Krishnankoil 626 126, India
| | - C Ramalingan
- Department of Chemistry, Kalasalingam University, Krishnankoil 626 126, India
| | - B Sridhar
- Laboratory of X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 067, India
| | - S Selvanayagam
- Department of Physics & International Research Centre, Kalasalingam University, Krishnankoil 626 126, India
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Safari J, Gandomi-Ravandi S. Titanium dioxide supported on MWCNTs as an eco-friendly catalyst in the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones accelerated under microwave irradiation. NEW J CHEM 2014. [DOI: 10.1039/c3nj01618h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Some transition metal oxides supported on MWCNTs were prepared as novel heterogeneous catalysts using the facile processes. These catalysts were used for the synthesis of Biginelli compounds under microwave irradiation.
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Affiliation(s)
- Javad Safari
- Laboratory of Organic Compound Research
- Department of Organic Chemistry
- College of Chemistry
- University of Kashan
- Kashan, Islamic Republic of Iran
| | - Soheila Gandomi-Ravandi
- Laboratory of Organic Compound Research
- Department of Organic Chemistry
- College of Chemistry
- University of Kashan
- Kashan, Islamic Republic of Iran
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17
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Umesha K, Sarojini BK, Darshan Raj CG, Bhanuprakash V, Yogisharadhya R, Raghavendra R, Khan MTH. In vitro and in silico biological studies of novel thiazolo[3,2-a]pyrimidine-6-carboxylate derivatives. Med Chem Res 2014. [DOI: 10.1007/s00044-013-0606-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Malmquist J, Bernlind A, Lindberg S. Imaging agent of a TRPA1 inhibitor. J Labelled Comp Radiopharm 2013; 56:536-7. [PMID: 24285533 DOI: 10.1002/jlcr.3030] [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: 11/09/2012] [Revised: 01/14/2013] [Accepted: 01/15/2013] [Indexed: 11/08/2022]
Abstract
A method for the preparation of [3'-(3) H]-4-(2'-chloro-6'-hydroxyphenyl)-2-thioxo-3,4-dihydro-1H-indeno[1,2-d]pyrimidin-5(2H)-one (1), a TRPA1 inhibitor, was developed for the evaluation of imaging properties of a class of TRPA1 inhibitors. 1 was prepared via tritiation of a protected benzaldehyde followed by a tetrachlorosilane catalyzed multicomponent one-step fusion and was obtained at a specific activity of 0.9 TBq/mmol. A (3) H-NMR spectrum on 13.5 MBq at 75 μM was recorded.
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Affiliation(s)
- Jonas Malmquist
- Isotope Chemistry, Screening and Profiling Global DMPK IM, AstraZeneca, Research & Development
- Innovative Medicines, SE- 151 85, Södertälje, Sweden; Current address: Novandi Chemistry AB, Biovation Park Telge, SE- 151 85, Södertälje, Sweden
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Safaei Ghomi J, Teymuri R, Ziarati A. A green synthesis of 3,4-dihydropyrimidine-2(1H)-one/thione derivatives using nanosilica-supported tin(II) chloride as a heterogeneous nanocatalyst. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-013-1068-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Ghorbani-Choghamarani A, Taghipour T, Azadi G. One-pot, Green and Efficient Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones or Thiones Catalyzed by Citric Acid. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Rajack A, Yuvaraju K, Praveen C, Murthy Y. A facile synthesis of 3,4-dihydropyrimidinones/thiones and novel N-dihydro pyrimidinone-decahydroacridine-1,8-diones catalyzed by cellulose sulfuric acid. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.01.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Vozny IV, Stepanov DP, Mishnev AF, Žalubovskis R. Synthesis of 2-Hydroxyimino-1,2,3,4-tetrahydropyrimidines. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1203-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Puttaraju KB, Shivashankar K. Iodine-catalyzed three component reaction: a novel synthesis of 2-aryl-imidazo[1,2-a]pyridine scaffolds. RSC Adv 2013. [DOI: 10.1039/c3ra43407a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Biginelli Condensation: Synthesis and Structure Diversification of 3,4-Dihydropyrimidin-2(1H)-one Derivatives. ADVANCES IN HETEROCYCLIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-396530-1.00003-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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25
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Safaei-Ghomi J, Ghasemzadeh MA. Preparation of 4,6-Diaryl-3,4-dihydropyrimidine-2(1H)-thiones in an Ionic Liquid. ORG PREP PROCED INT 2012. [DOI: 10.1080/00304948.2012.730944] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Fe3O4 Nanoparticles as an Efficient and Magnetically Recoverable Catalyst for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones under Solvent-Free Conditions. CHINESE JOURNAL OF CATALYSIS 2011. [DOI: 10.1016/s1872-2067(10)60263-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Khatab TK, El-Bayouki KA, Basyouni WM. An efficient synthesis of β-acylureas via a three-component, one-pot synthesis using TCS/ZnCl2. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.066] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Pasunooti KK, Chai H, Jensen CN, Gorityala BK, Wang S, Liu XW. A microwave-assisted, copper-catalyzed three-component synthesis of dihydropyrimidinones under mild conditions. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.10.150] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Ultrasound-assisted synthesis of dihydropyrimidine-2-thiones. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2011. [DOI: 10.2298/jsc100212057s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Chalcone derivatives were prepared by the condensation of various substituted
aryl aldehydes and acetophenone in alkaline ethanol, while
pyrimidine-2-thione derivatives were prepared by the combination of chalcones
and thiourea under conventional and ultrasonic conditions. Advantages of the
ultrasound effect were observed and high yields of the products were obtained
after 20-30 min sonication. Characterization and structural elucidation of
the products was realized based on chemical, analytical and spectral
analyses. The results clearly demonstrated a high efficiency of the
ultrasonic systems was achieved in the chemical processes.
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Li WJ, Liu S, He P, Ding MW. New efficient synthesis of pyrimido[1,6-c]quinazolin-4-ones by a Biginelli 3CC/Staudinger/aza-Wittig sequence. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.08.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Aridoss G, Jeong YT. A Convenient One-Pot Biginelli Reaction Catalyzed by Y(OAc)3: An Improved Protocol for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones and Their Sulfur Analogues. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.04.863] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Ramalingan C, Park SJ, Lee IS, Kwak YW. A piperidinium triflate catalyzed Biginelli reaction. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.02.067] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang DC, Guo HM, Qu GR. Efficient, Green, Solvent-Free Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones via Biginelli Reaction Catalyzed by Cu(NO3)2·3H2O. SYNTHETIC COMMUN 2010. [DOI: 10.1080/00397910903043009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Badawy DS, Abdel-Galil E, Kandeel EM, Basyouni WM, Khatab TK. Tetrachlorosilane-Zinc Chloride as a New Potent Binary Reagent for One-Pot, Three-Component Synthesis of Mannich-Type Products. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500802589907] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Doria S. Badawy
- a Chemistry Department, Faculty of Science , Mansoura University , Mansoura, Egypt
| | - Ebrahim Abdel-Galil
- a Chemistry Department, Faculty of Science , Mansoura University , Mansoura, Egypt
| | - Ezzat M. Kandeel
- a Chemistry Department, Faculty of Science , Mansoura University , Mansoura, Egypt
| | - Wahid M. Basyouni
- b Organometallic and Organometalloid Chemistry Department , National Research Centre , Dokki, Cairo, Egypt
| | - Tamer K. Khatab
- b Organometallic and Organometalloid Chemistry Department , National Research Centre , Dokki, Cairo, Egypt
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Salama TA, El-Ahl AAS, Elmorsy SS, Khalil AGM, Ismail MA. A new convenient procedure for the thionation of carbonyl compounds utilizing tetrachlorosilane–sodium sulfide. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.08.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rong L, Han H, Jiang H, Dai Y, Zhuang M, Cao M, Tu S. An efficient and convenient multicomponent reaction for the synthesis of 2-methyl-4,6-diarylpyrimidine under solvent-free conditions. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Manlove A, Groziak MP. Chapter 6.2: Six-Membered Ring Systems: Diazines and Benzo Derivatives. PROGRESS IN HETEROCYCLIC CHEMISTRY 2009. [DOI: 10.1016/s0959-6380(09)70040-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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A chemical placebo: NaCl as an effective, cheapest, non-acidic and greener catalyst for Biginelli-type 3,4-dihydropyrimidin-2(1H)-ones (-thiones) synthesis. Mol Divers 2008; 13:5-25. [DOI: 10.1007/s11030-008-9094-8] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 09/29/2008] [Indexed: 11/25/2022]
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