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Gali A. Synthesis and Biological evaluation of some new 2-thioxoimidazolidin-4-one derivatives (part II). ACTA ACUST UNITED AC 2018. [DOI: 10.23851/mjs.v29i1.111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the present work adifferent of new heterocyclic compounds were synthesized by reaction of thiosemicarbazide with tow aldehydes (4-bromo benzaldehyde,2-chloro benzaldehyde). the reacting `of compounds(1,2) with ethyl chloroacetate to give 3-[(arylidene)amino]-2-sulfanyl-3,5-dihydro-4H-imidazol-4-one (3,4) which treating with defferent aldehydes togive chalcones . the compound (3) reacted with ethyl aceto acetate to give ethyl 4-aryl-1-[(4-bromo benzylidene)amino]-6-oxo-2-sulfanyl-3a,4,5,6,7,7a-hexahydro-1H-benzimidazole-5-carboxylate,and in series of reaction converted into a variety of derivatives. The prepared compounds were characterized by 1H NMR and FTIR spectroscopy.further more antibacterial activity of some the prepared new cyclic compounds were evaluated against three types of bacteria
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Khorramabadi-zad A, Azadmanesh M, Bayat Y. Green Synthesis of 1,3-Dibenzylimidazolidine-2,4,5-triones by Oxidation of Hexabenzylhexaazaisowurtzitanes. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Yadollah Bayat
- Department of Chemistry; Malek Ashtar University of Technology; P.O. Box 16765-3454 Tehran Iran
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Vincent-Rocan JF, Ivanovich RA, Clavette C, Leckett K, Bejjani J, Beauchemin AM. Cascade reactions of nitrogen-substituted isocyanates: a new tool in heterocyclic chemistry. Chem Sci 2016; 7:315-328. [PMID: 29861985 PMCID: PMC5952554 DOI: 10.1039/c5sc03197d] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 09/22/2015] [Indexed: 11/25/2022] Open
Abstract
In contrast to normal C-substituted isocyanates, nitrogen-substituted isocyanates (N-isocyanates) are rare. Their high reactivity and amphoteric/ambident nature has prevented the scientific community from exploiting their synthetic potential. Recently, we have developed an in situ formation approach using a reversible equilibrium, which allows controlled generation and reactivity of N-isocyanates and prevents the dimerization that is typically observed with these intermediates. This blocked (masked) N-isocyanate approach enables the use of various N-isocyanate precursors to assemble heterocycles possessing the N-N-C[double bond, length as m-dash]O motif, which is often found in agrochemicals and pharmaceuticals. Cascade reactions for the rapid assembly of several valuable 5- and 6-membered heterocycles are reported, including amino-hydantoins, acyl-pyrazoles, acyl-phthalazinones and azauracils. Over 100 different compounds were synthesized using amino-, imino- and amido-substituted N-isocyanates, demonstrating their potential as powerful intermediates in heterocyclic synthesis. Their reactivity also enables access to unprecedented bicyclic derivatives and to substitution patterns of azauracils that are difficult to access using known methods, illustrating that controlled reactivity of N-isocyanates provides new disconnections, and a new tool to assemble complex N-N-C[double bond, length as m-dash]O containing motifs.
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Affiliation(s)
- Jean-François Vincent-Rocan
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Ryan A Ivanovich
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Christian Clavette
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Kyle Leckett
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Julien Bejjani
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - André M Beauchemin
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
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4
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A Cascade Synthesis of Aminohydantoins Using In Situ-GeneratedN-Substituted Isocyanates. Chemistry 2015; 21:3886-90. [DOI: 10.1002/chem.201405648] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Indexed: 11/07/2022]
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5
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Belabassi Y, Chao CK, Holly R, George KM, Nagy JO, Thompson CM. Preparation and characterization of diethoxy- and monoethoxy phosphylated ('aged') serine haptens and use in the production of monoclonal antibodies. Chem Biol Interact 2014; 223:134-40. [PMID: 25261769 DOI: 10.1016/j.cbi.2014.09.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 08/17/2014] [Accepted: 09/12/2014] [Indexed: 11/27/2022]
Abstract
In this study, the first mechanism-based monoclonal antibodies have been produced that recognize and differentiate diethoxy- and monoethoxyphosphorylated serine residues. Haptens were synthesized as the stable phosphonate form of phosphoserine esters to improve the immunoresponse. Following condensation with a glutaric anhydride to link the phosphoserine moieties to carrier protein, the hapten densities attached to bovine serum albumin and keyhole limpet henocyanin were determined by partial trypsin digestion and MALDI mass spectrometry, and confirmed using a fluorescent assay (FITC) to quantify unmodified lysine residues. The conjugation reactions were pH optimized to improve hapten density. Screening of subclones led to the identification of two monoclonal antibodies: (a) N257/25.11 that specifically recognizes (EtO)2P(O)-Ser as the phosphylated or inhibited form, and (b) N262/16 that recognizes (EtO)(HO)P(O)-Ser as the 'aged' form. Analysis of blood samples treated with paraoxon (EtO)2P(O)-OPhNO2 showed a concentration dependent recognition of the phosphylated form.
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Affiliation(s)
- Yamina Belabassi
- ATERIS Technologies LLC, 901 N Orange Street, Missoula, MT 59802, USA
| | - Chih-Kai Chao
- ATERIS Technologies LLC, 901 N Orange Street, Missoula, MT 59802, USA
| | - Ryan Holly
- ATERIS Technologies LLC, 901 N Orange Street, Missoula, MT 59802, USA
| | - Kathleen M George
- Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT 59812, USA
| | - Jon O Nagy
- ATERIS Technologies LLC, 901 N Orange Street, Missoula, MT 59802, USA
| | - Charles M Thompson
- ATERIS Technologies LLC, 901 N Orange Street, Missoula, MT 59802, USA; Department of Biomedical and Pharmaceutical Sciences, The University of Montana, Missoula, MT 59812, USA.
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6
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Synthesis and mass spectral fragmentation patterns of some nitrogen heterocycles with antimicrobial activity. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-012-1009-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Chumachenko SA, Shablykin OV, Vasilenko AN, Brovarets VS. Recyclization of 2-methoxy-5-morpholino-1,3-oxazole-4-carbonitrile by benzylamine, phenethylamine, and phenylhydrazine. RUSS J GEN CHEM+ 2013. [DOI: 10.1134/s1070363213090144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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A facile protocol for the preparation of 5-alkylidene and 5-imino substituted hydantoins from N,N′-disubstituted parabanic acids. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.129] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Radiosynthesis of [13N]dantrolene, a positron emission tomography probe for breast cancer resistant protein, using no-carrier-added [13N]ammonia. Bioorg Med Chem 2012; 20:305-10. [DOI: 10.1016/j.bmc.2011.10.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 10/27/2011] [Accepted: 10/29/2011] [Indexed: 10/15/2022]
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Ali Döndaş H, Nural Y, Grigg R, Şahin E. Polysubstituted Fused Ring Bicyclic Thiohydantoins from Aminocarbo-N-thioylpyrrolidines Derived from Azomethine Ylide 1,3-Dipolar Cycloadditions. HETEROCYCLES 2011. [DOI: 10.3987/com-11-12276] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Waibel M, Hasserodt J. Diversity-Oriented Synthesis of a Drug-Like System Displaying the Distinctive N→C═O Interaction. J Org Chem 2008; 73:6119-26. [DOI: 10.1021/jo800719j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael Waibel
- Laboratoire de Chimie, UMR CNRS 5182, Université de Lyon-ENS, 46 allée d’Italie, 69364 Lyon cedex 07, France
| | - Jens Hasserodt
- Laboratoire de Chimie, UMR CNRS 5182, Université de Lyon-ENS, 46 allée d’Italie, 69364 Lyon cedex 07, France
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Heng S, Stieglitz KA, Eldo J, Xia J, Cardia JP, Kantrowitz ER. T-state Inhibitors of E. coli Aspartate Transcarbamoylase that Prevent the Allosteric Transition,. Biochemistry 2006; 45:10062-71. [PMID: 16906764 DOI: 10.1021/bi0601095] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Escherichia coli aspartate transcarbamoylase (ATCase) catalyzes the committed step in pyrimidine nucleotide biosynthesis, the reaction between carbamoyl phosphate (CP) and l-aspartate to form N-carbamoyl-l-aspartate and inorganic phosphate. The enzyme exhibits homotropic cooperativity and is allosterically regulated. Upon binding l-aspartate in the presence of a saturating concentration of CP, the enzyme is converted from the low-activity low-affinity T state to the high-activity high-affinity R state. The potent inhibitor N-phosphonacetyl-l-aspartate (PALA), which combines the binding features of Asp and CP into one molecule, has been shown to induce the allosteric transition to the R state. In the presence of only CP, the enzyme is the T structure with the active site primed for the binding of aspartate. In a structure of the enzyme-CP complex (T(CP)), two CP molecules were observed in the active site approximately 7A apart, one with high occupancy and one with low occupancy. The high occupancy site corresponds to the position for CP observed in the structure of the enzyme with CP and the aspartate analogue succinate bound. The position of the second CP is in a unique site and does not overlap with the aspartate binding site. As a means to generate a new class of inhibitors for ATCase, the domain-open T state of the enzyme was targeted. We designed, synthesized, and characterized three inhibitors that were composed of two phosphonacetamide groups linked together. These two phosphonacetamide groups mimic the positions of the two CP molecules in the T(CP) structure. X-ray crystal structures of ATCase-inhibitor complexes revealed that each of these inhibitors bind to the T state of the enzyme and occupy the active site area. As opposed to the binding of Asp in the presence of CP or PALA, these inhibitors are unable to initiate the global T to R conformational change. Although the best of these T-state inhibitors only has a K(i) value in the micromolar range, the structural information with respect to their mode of binding provides important information for the design of second generation inhibitors that will have even higher affinity for the active site of the T state of the enzyme.
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Affiliation(s)
- Sabrina Heng
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
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