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Al-Majid AM, Alammari AS, Alshahrani S, Haukka M, Islam MS, Barakat A. Cu(ii)-thiophene-2,5-bis(amino-alcohol) mediated asymmetric Aldol reaction and Domino Knoevenagel Michael cyclization: a new highly efficient Lewis acid catalyst. RSC Adv 2022; 12:6149-6165. [PMID: 35424540 PMCID: PMC8982094 DOI: 10.1039/d2ra00674j] [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: 01/31/2022] [Accepted: 02/09/2022] [Indexed: 11/24/2022] Open
Abstract
The highly efficient Lewis acid-catalytic system Cu(ii)-thiophene-2,5-bis(amino-alcohol) has been developed for enantioselective Aldol reaction of isatin derivatives with ketones. The new catalytic system also proved to be highly enantioselective for the one pot three-component Domino Knoevenagel Michael cyclization reaction of substituted isatin with malononitrile and ethylacetoacetate. The chiral ligand (2S,2′S)-2,2′-((thiophene-2,5-diylbis(methylene))bis(azanediyl))bis(3-phenylpropan-1-ol) (L1) in combination with Cu(OAc)2·H2O employed as a new Lewis acid catalyst, furnished 3-substituted-3-hydroxyindolin-2-ones derivatives (3a–s) in good to excellent yields (81–99%) with high enantioselectivities (up to 96% ee) and spiro[4H-pyran-3,3-oxindole] derivatives (6a–l) in excellent yields (89–99%) with high ee (up to 95%). These aldol products and spiro-oxindoles constitute a core structural motif in a large number of pharmaceutically active molecules and natural products. The highly efficient Lewis acid-catalytic system Cu(ii)-thiophene-2,5-bis(amino-alcohol) has been developed for enantioselective Aldol reaction of isatin derivatives with ketones.![]()
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Affiliation(s)
- Abdullah Mohammed Al-Majid
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Abdullah Saleh Alammari
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Saeed Alshahrani
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Matti Haukka
- Department of Chemistry, University of Jyväskylä P. O. Box 35 FI-40014 Jyväskylä Finland
| | - Mohammad Shahidul Islam
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia +966-61-1467-5992
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2
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Islam MS, Alammari AS, Barakat A, Alshahrani S, Haukka M, Al-Majid AM. Exploiting the Chiral Ligands of Bis(imidazolinyl)- and Bis(oxazolinyl)thiophenes-Synthesis and Application in Cu-Catalyzed Friedel-Crafts Asymmetric Alkylation. Molecules 2021; 26:molecules26237408. [PMID: 34885989 PMCID: PMC8658940 DOI: 10.3390/molecules26237408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/29/2021] [Accepted: 12/03/2021] [Indexed: 12/03/2022] Open
Abstract
Five new C2-symmetric chiral ligands of 2,5-bis(imidazolinyl)thiophene (L1–L3) and 2,5-bis(oxazolinyl)thiophene (L4 and L5) were synthesized from thiophene-2,5-dicarboxylic acid (1) with enantiopure amino alcohols (4a–c) in excellent optical purity and chemical yield. The utility of these new chiral ligands for Friedel–Crafts asymmetric alkylation was explored. Subsequently, the optimized tridentate ligand L5 and Cu(OTf)2 catalyst (15 mol%) in toluene for 48 h promoted Friedel–Crafts asymmetric alkylation in moderate to good yields (up to 76%) and with good enantioselectivity (up to 81% ee). The bis(oxazolinyl)thiophene ligands were more potent than bis(imidazolinyl)thiophene analogues for the asymmetric induction of the Friedel–Crafts asymmetric alkylation.
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Affiliation(s)
- Mohammad Shahidul Islam
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia or (A.S.A.); (A.B.); or (S.A.)
- Correspondence: (M.S.I.); (A.M.A-M.)
| | - Abdullah Saleh Alammari
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia or (A.S.A.); (A.B.); or (S.A.)
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia or (A.S.A.); (A.B.); or (S.A.)
| | - Saeed Alshahrani
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia or (A.S.A.); (A.B.); or (S.A.)
| | - Matti Haukka
- Department of Chemistry, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland; (M.H.)
| | - Abdullah Mohammed Al-Majid
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia or (A.S.A.); (A.B.); or (S.A.)
- Correspondence: (M.S.I.); (A.M.A-M.)
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3
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Wang Z, Xu S, Wang K, Kong N, Liu X. Recent Studies of Bifunctionalization of Simple Indoles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100280] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhan‐Yong Wang
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Shaohong Xu
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Kai‐Kai Wang
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Niuniu Kong
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Xue Liu
- Department of Chemistry Lishui University Zhejiang P. R. China
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Bimetallic Iron-Palladium Catalyst System as a Lewis-Acid for the Synthesis of Novel Pharmacophores Based Indole Scaffold as Anticancer Agents. Molecules 2021; 26:molecules26082212. [PMID: 33921334 PMCID: PMC8070033 DOI: 10.3390/molecules26082212] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/01/2021] [Accepted: 04/01/2021] [Indexed: 11/26/2022] Open
Abstract
The Friedel–Crafts reaction between substituted indoles as nucleophiles with chalcones-based benzofuran and benzothiophene scaffolds was carried out by employing a highly efficient bimetallic iron–palladium catalyst system. This catalytic approach produced the desired bis-heteroaryl products with low catalyst loading, a simple procedure, and with acceptable yield. All synthesized indole scaffolds 3a–3s were initially evaluated for their cytotoxic effect against human fibroblast BJ cell lines and appeared to be non-cytotoxic. All non-cytotoxic compounds 3a–3s were then evaluated for their anticancer activities against cervical cancer HeLa, prostate cancer PC3, and breast cancer MCF-7 cell lines, in comparison to standard drug doxorubicin, with IC50 values 1.9 ± 0.4 µM, 0.9 ± 0.14 µM and 0.79 ± 0.05 µM, respectively, and appeared to be moderate to weak anticancer agents. Fluoro-substituted chalcone moiety-containing compounds, 3b appeared to be the most active member of the series against cervical HeLa (IC50 = 8.2 ± 0.2 µM) and breast MCF-7 cancer cell line (IC50 = 12.3 ± 0.04 µM), whereas 6-fluroindol-4-bromophenyl chalcone-containing compound 3e (IC50 = 7.8 ± 0.4 µM) appeared to be more active against PC3 prostate cancer cell line.
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Li J, Yu B, Lu Z. Chiral Imidazoline Ligands and Their Applications in
Metal‐Catalyzed
Asymmetric Synthesis
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000486] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jiajing Li
- Department of Chemistry, Zhejiang University Hangzhou Zhejiang 310058 China
| | - Bing Yu
- College of Chemistry, Zhengzhou University Zhengzhou Henan 450001 China
| | - Zhan Lu
- Department of Chemistry, Zhejiang University Hangzhou Zhejiang 310058 China
- College of Chemistry, Zhengzhou University Zhengzhou Henan 450001 China
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6
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Affiliation(s)
| | - Jetze J. Tepe
- Department of Chemistry Michigan State University East Lansing Michigan 48823
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Mohareb RM, Manhi FM, Mahmoud MAA, Abdelwahab A. Uses of dimedone to synthesis pyrazole, isoxazole and thiophene derivatives with antiproliferative, tyrosine kinase and Pim-1 kinase inhibitions. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02579-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Mohareb RM, Alwan ES. Heterocyclization of 2-(2-phenylhydrazono)cyclohexane-1,3-dione to Synthesis Thiophene, Pyrazole and 1,2,4-triazine Derivatives with Anti-Tumor and Tyrosine Kinase Inhibitions. Anticancer Agents Med Chem 2020; 20:1209-1220. [PMID: 32156245 DOI: 10.2174/1871520620666200310093911] [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: 11/20/2019] [Revised: 01/04/2020] [Accepted: 01/14/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Recently tetrahydrobenzo[b]thiazole derivatives acquired a special attention due to their wide range of pharmacological activities especially the therapeutic activities. Through the market it was found that many pharmacological drugs containing the thiazole nucleus were known. OBJECTIVE This work aimed to synthesize target molecules not only possess anti-tumor activities but also kinase inhibitors. The target molecules were obtained starting from the arylhydrazonocyclohexan-1,3-dione followed by their heterocyclization reactions to produce anticancer target molecules. METHODS The arylhydrazone derivatives 3a-c underwent different heterocyclization reactions to produce thiophene, thiazole, pyrazole and 1,2,4-triazine derivatives. The anti-proliferative activity of twenty six compounds among the synthesized compounds toward the six cancer cell lines namely A549, H460, HT-29, MKN-45, U87MG, and SMMC-7721 was studied. RESULTS Anti-proliferative evaluations, tyrosine and Pim-1 kinase inhibitions were perform for most of the synthesized compounds where the varieties of substituent through the aryl ring and the thiophene moiety afforded compounds with high activities. CONCLUSION The compounds with high anti-proliferative activity towards the cancer cell lines showed that compounds 3b, 3c, 5e, 5f, 8c, 9c, 11c, 12c, 14e, 14f and 16c were the most cytotoxic compounds. Further tests of the latter compounds toward the five tyrosine kinases c-Kit, Flt-3, VEGFR-2, EGFR, and PDGFR and Pim-1 kinase showed that compounds 3c, 5e, 5f, 8c, 9c, 12c, 14e, 14f and 16c were the most potent of the tested compounds toward the five tyrosine kinases and compounds 6d, 11a, 20b and 21e were of the highest inhibitions towards Pim-1 kinase. Pan Assay Interference Compounds (PAINS) for the most cytotoxic compounds showed zero PAINS alert and can be used as lead compounds.
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Affiliation(s)
- Rafat M Mohareb
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | - Ensaf S Alwan
- Department of Quality Assurance, Yemen Drug Company for Industry and Commerce, (YEDCO), Sana'a, Yemen
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Boraei ATA, Ghabbour HA, Gomaa MS, El Ashry ESH, Barakat A. Synthesis and Anti-Proliferative Assessment of Triazolo-Thiadiazepine and Triazolo-Thiadiazine Scaffolds. Molecules 2019; 24:molecules24244471. [PMID: 31817609 PMCID: PMC6943432 DOI: 10.3390/molecules24244471] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/29/2019] [Accepted: 12/04/2019] [Indexed: 11/16/2022] Open
Abstract
A series of triazolo-thiadiazepines 4a–k were synthesized with excellent yields using dehydrated PTSA as a catalyst in toluene. Two triazolo-thiadiazines were obtained; 8a was formed directly by reflux in ethanol, whereas, PTSA promoted the formation of 8b. The molecular structure of the formed triazolo-thiadiazepines is identical to the imine-form 4a–k and not the enamine-tautomer 6a–k. The structures of the newly synthesized triazolo-thiadiazepines 4a–k and triazolo-thiadiazines 8a–b were elucidated using NMR (1H, and 13C), 2D NMR, HRMS, and X-ray single crystal. Furthermore, 4a was deduced using X-ray single crystal diffraction analysis. These new thiadiazepine hits represent an optimized series of previously synthesized indole-triazole derivatives for the inhibition of EGFR. The cytotoxicity activity against two cancer cell lines including human liver cancer (HEPG-2) and breast cancer (MCF-7) was promising, with IC50 between 12.9 to 44.6 µg/mL and 14.7 to 48.7 µg/mL for the tested cancer cell lines respectively, compared to doxorubicin (IC50 4.0 µg/mL). Docking studies revealed that the thiadiazepine scaffold presented a suitable anchor, allowing good interaction of the various binding groups with the enzyme binding regions and sub-pockets.
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Affiliation(s)
- Ahmed T. A. Boraei
- Chemistry Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
- Correspondence: (A.T.A.B); (A.B.); Tel.: +966-11467-5901 (A.B.); Fax: +966-11467-5992 (A.B.)
| | - Hazem A. Ghabbour
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
| | - Mohamed S. Gomaa
- Pharmaceutical Chemistry Department, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam 32241, Saudi Arabia;
| | - El Sayed H. El Ashry
- Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt;
| | - Assem Barakat
- Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
- Correspondence: (A.T.A.B); (A.B.); Tel.: +966-11467-5901 (A.B.); Fax: +966-11467-5992 (A.B.)
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10
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Badria FA, Atef S, Al‐Majid AM, Ali M, Elshaier YAMM, Ghabbour HA, Islam MS, Barakat A. Synthesis and Inhibitory Effect of Some Indole-Pyrimidine Based Hybrid Heterocycles on α-Glucosidase and α-Amylase as Potential Hypoglycemic Agents. ChemistryOpen 2019; 8:1288-1297. [PMID: 31649838 PMCID: PMC6804419 DOI: 10.1002/open.201900240] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/18/2019] [Indexed: 11/09/2022] Open
Abstract
The Michael addition reaction of barbituric acid with chalcones incorporating the indole scaffold was achieved by using a highly efficient bimetallic Iron-palladium catalyst in the presence of acetylacetone (acac). This catalytic approach produced the desired products in a simple operation and low catalyst loading with acceptable yield of the new hybrids. All tested compounds were subjected for biological activity on α-glucosidase and α-amylase. The results revealed that all synthesized compounds exhibited very good activity against both enzymes when compared to positive control (acarbose). Moreover, compound 5o showed the best activity whereas its IC50 (μM) are 13.02+0.01 and 21.71+0.82 for α-glucosidase and α-amylase respectively. Both compounds 5o and 5l exhibited high similarity in binding mode and pose with amylase protein (4UAC). The obtained data may be used for developing potential hypoglycemic agents.
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Affiliation(s)
- Farid A. Badria
- Department of Pharmacognosy, Faculty of pharmacyMansura UniversityMansura35516Egypt
| | - Saleh Atef
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
| | | | - M. Ali
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
| | - Yaseen A. M. M. Elshaier
- Department of Organic and Medicinal chemistry, Faculty of PharmacyUniversity of Sadat CityMenoufiyaEgypt
| | - Hazem A. Ghabbour
- Department of Medicinal Chemistry, Faculty of PharmacyUniversity of MansouraMansoura35516Egypt
| | - Mohammad Shahidul Islam
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
| | - Assem Barakat
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
- Department of Chemistry, Faculty of ScienceAlexandria UniversityP.O. Box 426Ibrahimia, Alexandria21321Egypt
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11
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Heravi MM, Zadsirjan V, Masoumi B, Heydari M. Organometal-catalyzed asymmetric Friedel-Crafts reactions. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Race NJ, Yuan Q, Sigman MS. Enantioselective C2-Alkylation of Indoles through a Redox-Relay Heck Reaction of 2-Indole Triflates. Chemistry 2018; 25:512-515. [PMID: 30402891 DOI: 10.1002/chem.201805416] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Indexed: 11/06/2022]
Abstract
A palladium-catalyzed enantioselective redox-relay Heck reaction of 2-indole triflates and disubstituted alkenes is reported. This process combines readily available indole triflates with a variety of alkenes to afford a range of indole derivatives bearing a stereocenter adjacent to C2. Enantioselectivity is achieved through use of a simple pyridine-oxazoline ligand. Tuning the electronics of the indole, through judicious choice of N-protecting group, is required to ensure selective β-hydride elimination away from the indole core. Utility of this method is highlighted in a modular formal synthesis of an S1P1 agonist precursor developed by Merck.
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Affiliation(s)
- Nicholas J Race
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
| | - Qianjia Yuan
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
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13
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Synthesis, molecular structure, spectral analysis, and biological activity of new malonamide derivatives as α-glucosidase inhibitors. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.093] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Al-Majid AM, Islam MS, Barakat A, Al-Qahtani NJ, Yousuf S, Iqbal Choudhary M. Tandem Knoevenagel–Michael reactions in aqueous diethylamine medium: A greener and efficient approach toward bis-dimedone derivatives. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2014.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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15
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Hao XQ, Wang C, Liu SL, Wang X, Wang L, Gong JF, Song MP. Cobalt(ii)/(imidazoline–oxazoline)-catalyzed enantioselective Michael addition of 2-acetyl azaarenes to β-CF3-β-disubstituted nitroalkenes. Org Chem Front 2017. [DOI: 10.1039/c6qo00562d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cobalt(ii)/(imidazoline–oxazoline)-catalyzed enantioselective Michael addition of 2-acetyl azaarenes to β-CF3-β-disubstituted nitroalkenes is reported, providing chiral compounds with an all-carbon quaternary stereocenter in high yields and excellent enantioselectivities.
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Affiliation(s)
- Xin-Qi Hao
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Cong Wang
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Shuang-Liang Liu
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Xiao Wang
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Li Wang
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Jun-Fang Gong
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Mao-Ping Song
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
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Chen JB, Jia YX. Recent progress in transition-metal-catalyzed enantioselective indole functionalizations. Org Biomol Chem 2017; 15:3550-3567. [DOI: 10.1039/c7ob00413c] [Citation(s) in RCA: 189] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Recent progress on the transition-metal-catalyzed enantioselective functionalization reaction of indoles is reviewed, which is mainly focused on asymmetric indole alkylations, arylations, cycloaddition reactions, and other reactions.
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Affiliation(s)
- Jing-Biao Chen
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Yi-Xia Jia
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
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17
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Stereoselective synthesis of diazaspiro[5.5]undecane derivatives via base promoted [5+1] double Michael addition of N,N-dimethylbarbituric acid to diaryliedene acetones. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2015.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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18
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Li NK, Kong LP, Qi ZH, Yin SJ, Zhang JQ, Wu B, Wang XW. Friedel-Crafts Reaction of Indoles with Isatin-Derived β,γ-Unsaturated α-Keto Esters Using a BINOL-Derived Bisoxazoline (BOX)/Copper(II) Complex as Catalyst. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600272] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nai-Kai Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ling-Pei Kong
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Zheng-Hang Qi
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Shao-Jie Yin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Jun-Qi Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Bing Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Xing-Wang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
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Al Majid AM, Barakat A, Mabkhot YN, Al-Agamy MH. Synthesis, and characterization of a new series of sulfite and sulfate derivatives of d-Mannitol. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2013.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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20
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García-García C, Ortiz-Rojano L, Álvarez S, Álvarez R, Ribagorda M, Carreño MC. Friedel–Crafts Alkylation of Indoles with p-Quinols: The Role of Hydrogen Bonding of Water for the Desymmetrization of the Cyclohexadienone System. Org Lett 2016; 18:2224-7. [DOI: 10.1021/acs.orglett.6b00781] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carolina García-García
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
| | - Laura Ortiz-Rojano
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
| | - Susana Álvarez
- Departamento
de Química Orgánica, Facultad de Química, Universidade de Vigo, CINBIO, Lagoas-Marcosende s/n, 36310 Vigo, Spain
| | - Rosana Álvarez
- Departamento
de Química Orgánica, Facultad de Química, Universidade de Vigo, CINBIO, Lagoas-Marcosende s/n, 36310 Vigo, Spain
| | - María Ribagorda
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
| | - M. Carmen Carreño
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
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Boraei ATA, El Ashry ESH, Barakat A, Ghabbour HA. Synthesis of New Functionalized Indoles Based on Ethyl Indol-2-carboxylate. Molecules 2016; 21:333. [PMID: 26978331 PMCID: PMC6273620 DOI: 10.3390/molecules21030333] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/23/2016] [Accepted: 02/26/2016] [Indexed: 01/08/2023] Open
Abstract
Successful alkylations of the nitrogen of ethyl indol-2-carboxylate were carried out using aq. KOH in acetone. The respective N-alkylated acids could be obtained without separating the N-alkylated esters by increasing the amount of KOH and water. The use of NaOMe in methanol led to transesterification instead of the alkylation, while the use of NaOEt led to low yields of the N-alkylated acids. Hydrazinolysis of the ester gave indol-2-carbohydrazide which then was allowed to react with different aromatic aldehydes and ketones in ethanol catalyzed by acetic acid. Indol-2-thiosemicarbazide was used in a heterocyclization reaction to form thiazoles. The new structures were confirmed using NMR, mass spectrometry and X-ray single crystal analysis.
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Affiliation(s)
- Ahmed T A Boraei
- Chemistry Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt.
| | - El Sayed H El Ashry
- Chemistry Department, Faculty of Science, Alexandria University, P. O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| | - Assem Barakat
- Chemistry Department, College of Science, King Saud University, P. O. BOX 2455, Riyadh 11451, Saudi Arabia.
- Chemistry Department, Faculty of Science, Alexandria University, P. O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| | - Hazem A Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P. O. Box 2457, Riyadh 11451, Saudi Arabia.
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
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Islam MS, Barakat A, Al-Majid AM, Ghabbour HA, Rahman AFMM, Javaid K, Imad R, Yousuf S, Choudhary MI. A concise synthesis and evaluation of new malonamide derivatives as potential α-glucosidase inhibitors. Bioorg Med Chem 2016; 24:1675-82. [PMID: 26972921 DOI: 10.1016/j.bmc.2016.02.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 02/26/2016] [Accepted: 02/27/2016] [Indexed: 11/28/2022]
Abstract
A series of new malonamide derivatives were synthesized by Michael addition reaction of N(1),N(3)-di(pyridin-2-yl)malonamide into α,β-unsaturated ketones mediated by DBU in DCM at ambient temperature. The inhibitory potential of these compounds in vitro, against α-glucosidase enzyme was evaluated. Result showed that most of malonamide derivatives were identified as a potent inhibitors of α-glucosidase enzyme. Among all the compounds, 4K (IC50=11.7 ± 0.5 μM) was found out as the most active one compared to standard drug acarbose (IC50=840 ± 1.73 μM). Further cytotoxicity of 4a-4m were also evaluated against a number of cancer and normal cell lines and interesting results were obtained.
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Affiliation(s)
- Mohammad Shahidul Islam
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia; Department of Chemistry, Faculty of Science, Alexandria University, PO Box 426, Ibrahimia, 21321 Alexandria, Egypt.
| | - Abdullah M Al-Majid
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Hazem A Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia; Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - A F M Motiur Rahman
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
| | - Kulsoom Javaid
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Rehan Imad
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Sammer Yousuf
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - M Iqbal Choudhary
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
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Gürdere MB, Özbek O, Ceylan M. Aluminum chloride–catalyzed C-alkylation of pyrrole and indole with chalcone and bis-chalcone derivatives. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2015.1136644] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Meliha Burcu Gürdere
- Department of Chemistry, Faculty of Arts and Sciences, Gaziosmanpasa University, Tokat, Turkey
| | - Oguz Özbek
- Department of Chemistry, Faculty of Arts and Sciences, Gaziosmanpasa University, Tokat, Turkey
| | - Mustafa Ceylan
- Department of Chemistry, Faculty of Arts and Sciences, Gaziosmanpasa University, Tokat, Turkey
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Barakat A, Islam MS, Al-Majid AM, Soliman SM, Mabkhot YN, Al-Othman ZA, Ghabbour HA, Fun HK. Synthesis of novel 5-monoalkylbarbiturate derivatives: new access to 1,2-oxazepines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.108] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Barakat A, Al-Majid AM, Soliman SM, Lotfy G, Ghabbour HA, Fun HK, Wadood A, Warad I, Sloop JC. New Diethyl Ammonium Salt of Thiobarbituric Acid Derivative: Synthesis, Molecular Structure Investigations and Docking Studies. Molecules 2015; 20:20642-58. [PMID: 26610441 PMCID: PMC6331823 DOI: 10.3390/molecules201119710] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 11/07/2015] [Accepted: 11/11/2015] [Indexed: 11/17/2022] Open
Abstract
The synthesis of the new diethyl ammonium salt of diethylammonium(E)-5-(1,5-bis(4-fluorophenyl)-3-oxopent-4-en-1-yl)-1,3-diethyl-4,6-dioxo-2-thioxohexaydropyrimidin-5-ide 3 via a regioselective Michael addition of N,N-diethylthiobarbituric acid 1 to dienone 2 is described. In 3, the carboanion of the thiobarbituric moiety is stabilized by the strong intramolecular electron delocalization with the adjacent carbonyl groups and so the reaction proceeds without any cyclization. The molecular structure investigations of 3 were determined by single-crystal X-ray diffraction as well as DFT computations. The theoretically calculated (DFT/B3LYP) geometry agrees well with the crystallographic data. The effect of fluorine replacement by chlorine atoms on the molecular structure aspects were investigated using DFT methods. Calculated electronic spectra showed a bathochromic shift of the π-π* transition when fluorine is replaced by chlorine. Charge decomposition analyses were performed to study possible interaction between the different fragments in the studied systems. Molecular docking simulations examining the inhibitory nature of the compound show an anti-diabetic activity with Pa (probability of activity) value of 0.229.
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Affiliation(s)
- Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
- Department of Chemistry, Faculty of Science, Alexandria University, P. O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| | - Abdullah Mohammed Al-Majid
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Saied M Soliman
- Department of Chemistry, College of Science & Arts, King Abdulaziz University, P. O. Box 344,Rabigh 21911, Saudi Arabia.
- Department of Chemistry, Faculty of Science, Alexandria University, P. O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| | - Gehad Lotfy
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt.
| | - Hazem A Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P. O. Box 2457, Riyadh 11451, Saudi Arabia.
| | - Hoong-Kun Fun
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P. O. Box 2457, Riyadh 11451, Saudi Arabia.
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, Penang 11800, Malaysia.
| | - Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University, Mardan-23200, Pakistan.
| | - Ismail Warad
- Department of Chemistry, Science College, Al-Najah National University, P. O. Box 7, Nablus 0097, Palestine.
| | - Joseph C Sloop
- School of Science and Technology, Georgia Gwinnett College, 1000 University Center Lane, Lawrenceville, GA 30043, USA.
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Barakat A, Soliman SM, Al-Majid AM, Lotfy G, Ghabbour HA, Fun HK, Yousuf S, Choudhary MI, Wadood A. Synthesis and structure investigation of novel pyrimidine-2,4,6-trione derivatives of highly potential biological activity as anti-diabetic agent. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.06.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Barakat A, Islam MS, Al-Majid AM, Ghabbour HA, Fun HK, Javed K, Imad R, Yousuf S, Choudhary MI, Wadood A. Synthesis, in vitro biological activities and in silico study of dihydropyrimidines derivatives. Bioorg Med Chem 2015; 23:6740-8. [DOI: 10.1016/j.bmc.2015.09.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/29/2015] [Accepted: 09/01/2015] [Indexed: 11/30/2022]
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Barakat A, Al-Majid AM, Islam MS, Warad I, Masand VH, Yousuf S, Iqbal Choudhary M. Molecular structure investigation and biological evaluation of Michael adducts derived from dimedone. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2257-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Barakat A, Al-Majid AM, Soliman SM, Mabkhot YN, Ali M, Ghabbour HA, Fun HK, Wadood A. Structural and spectral investigations of the recently synthesized chalcone (E)-3-mesityl-1-(naphthalen-2-yl) prop-2-en-1-one, a potential chemotherapeutic agent. Chem Cent J 2015; 9:35. [PMID: 26106444 PMCID: PMC4477317 DOI: 10.1186/s13065-015-0112-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 06/08/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Chalcones (1,3-diaryl-2-propen-1-ones, represent an important subgroup of the polyphenolic family, which have shown a wide spectrum of medical and industrial application. Due to their redundancy in plants and ease of preparation, this category of molecules has inspired considerable attention for potential therapeutic uses. They are also effective in vivo as anti-tumor promoting, cell proliferating inhibitors and chemo preventing agents. RESULTS Synthesis and molecular structure investigation of (E)-3-mesityl-1-(naphthalen-2-yl) prop-2-en-1-one (3) is reported. The structure of the title compound 3 is confirmed by X-ray crystallography. The optimized molecular structure of the studied compound is calculated using DFT B3LYP/6-311G (d,p) method. The calculated geometric parameters are in good agreement with the experimental data obtained from our reported X-ay structure. The calculated IR fundamental bands were assigned and compared with the experimental data. The electronic spectra of the studied compound have been calculated using the time dependant density functional theory (TD-DFT). The longest wavelength band is due to H → L (79 %) electronic transition which belongs to π-π* excitation. The (1)H- and (13)C-NMR chemical shifts were calculated using gauge independent atomic orbitals (GIAO) method, which showed good correlations with the experimental data (R(2) = 0.9911-0.9965). The natural bond orbital (NBO) calculations were performed to predict the natural atomic charges at different atomic sites. The molecular electrostatic potential (MEP) was used to visualize the charge distribution on the molecule. Molecular docking results suggest that the compound might exhibit inhibitory activity against GPb and may act as potential anti-diabetic compound. CONCLUSIONS (E)-3-Mesityl-1-(naphthalen-2-yl) prop-2-en-1-one single crystal is grown and characterized by single crystal X-ray diffraction, FT-IR, UV-vis, DFT and optimized geometrical parameters are close to the experimental bond lengths and angles. Molecular stability was successfully analyzed using NBO and electron delocalization is confirmed by MEP. Prediction of Activity Spectra Analysis of the title compound, predicts anti-diabetic activity with probability to have an active value of 0.348. Graphical Abstract(E)-3-Mesityl-1-(naphthalen-2-yl) prop-2-en-1-one: a crystal structure and computational studies.
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Affiliation(s)
- Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, 11451 Riyadh, Saudi Arabia ; Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, 21321 Alexandria, Ibrahimia Egypt
| | - Abdullah Mohammed Al-Majid
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, 11451 Riyadh, Saudi Arabia
| | - Saied M Soliman
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, 21321 Alexandria, Ibrahimia Egypt
| | - Yahia Nasser Mabkhot
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, 11451 Riyadh, Saudi Arabia
| | - M Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, 11451 Riyadh, Saudi Arabia
| | - Hazem A Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, 11451 Riyadh, Saudi Arabia
| | - Hoong-Kun Fun
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, 11451 Riyadh, Saudi Arabia ; X-Ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM Penang, Malaysia
| | - Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University Mardan, 23200 Mardan, Pakistan
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Heteroarylidene-tethered bis(oxazoline) copper complexes catalyzed cascade reaction involving asymmetric Friedel–Crafts alkylation/N-hemiacetalization of indoles with β,γ-unsaturated α-ketoester. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Synthesis, molecular structure and spectroscopic investigations of novel fluorinated spiro heterocycles. Molecules 2015; 20:8223-41. [PMID: 25961163 PMCID: PMC6272187 DOI: 10.3390/molecules20058223] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 04/29/2015] [Accepted: 04/29/2015] [Indexed: 11/16/2022] Open
Abstract
This paper describes an efficient and regioselective method for the synthesis of novel fluorinated spiro-heterocycles in excellent yield by cascade [5+1] double Michael addition reactions. The compounds 7,11-bis(4-fluorophenyl)-2,4-dimethyl- 2,4-diazaspiro[5.5] undecane-1,3,5,9-tetraone (3a) and 2,4-dimethyl-7,11-bis (4-(trifluoromethyl)phenyl)-2,4-diazaspiro[5.5]undecane-1,3,5,9-tetraone (3b) were characterized by single-crystal X-ray diffraction, FT-IR and NMR techniques. The optimized geometrical parameters, infrared vibrational frequencies and NMR chemical shifts of the studied compounds have also been calculated using the density functional theory (DFT) method, using Becke-3-Lee-Yang-Parr functional and the 6-311G(d,p) basis set. There is good agreement between the experimentally determined structural parameters, vibrational frequencies and NMR chemical shifts of the studied compounds and those predicted theoretically. The calculated natural atomic charges using NBO method showed higher polarity of 3a compared to 3b.The calculated electronic spectra are also discussed based on the TD-DFT calculations.
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Oyama H, Nakada M. Highly enantioselective catalytic Friedel–Crafts reactions of cyclic α-alkylidene β-oxo imides. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.01.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Barakat A, Al-Najjar HJ, Al-Majid AM, Soliman SM, Mabkhot YN, Al-Agamy MH, Ghabbour HA, Fun HK. Synthesis, molecular structure investigations and antimicrobial activity of 2-thioxothiazolidin-4-one derivatives. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Weiss M, Peters R. Catalytic Direct Dehydrogenative Cross-Couplings of C–H (Pro)Nucleophiles and Allylic Alcohols without an Additional Oxidant. ACS Catal 2014. [DOI: 10.1021/cs501495g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Marcel Weiss
- Institut für Organische
Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - René Peters
- Institut für Organische
Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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Barakat A, Al-Najjar HJ, Al-Majid AM, Adil SF, Ali M, Masand VH, Ghabbour HA, Fun HK. Synthesis, X-ray diffraction, thermogravimetric and DFT analyses of pyrimidine derivatives. Molecules 2014; 19:17187-201. [PMID: 25347461 PMCID: PMC6271542 DOI: 10.3390/molecules191117187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 10/16/2014] [Accepted: 10/17/2014] [Indexed: 12/03/2022] Open
Abstract
An eco-benign synthesis of pyrimidine derivatives 2a,b containing different functional groups with different electronic character starting from nitroalkenes 1a and 2b has been described. The structures for 1a and 2a,b have been characterized by single crystal X-ray diffraction analysis. The thermal data of the molecules pointed towards important structural aspects of their stability. The mechanism of their thermal decomposition is discussed. The thermodynamic parameters of the dissociation steps were evaluated and discussed. DFT calculations reveal that the compound 1a possesses a high calculated dipole moment value (8.28 D) which indicates its high reactivity towards its surrounding molecules.
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Affiliation(s)
- Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Hany J Al-Najjar
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdullah M Al-Majid
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Syed F Adil
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohamed Ali
- Petrochemical Research Chair, Department of Chemistry, College of Science, King Saud University, B.O. 2455, Riaydh 11451, Saudi Arabia
| | - Vijay H Masand
- Department of Chemistry, Vidya Bharati College, Amravati, Maharashtra 444602, India
| | - Hazem A Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Hoong-Kun Fun
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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Barakat A, Al-Majid AM, Al-Qahatany FM, Islam MS, Al-Agamy MH. Synthesis, Characterization and Antimicrobial Activity of Novel Pharmacophores Incorporating Imidazoline-Oxazoline Scaffold. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.2.562] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Islam MS, Al Majid AM, Al-Othman ZA, Barakat A. Highly enantioselective Friedel–Crafts alkylation of indole with electron deficient trans-β-nitroalkenes using Zn(II)–oxazoline–imidazoline catalysts. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2013.11.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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39
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Barakat A, Al-Majid AM, Al-Ghamdi AM, Mabkhot YN, Rafiq Hussain Siddiqui M, Ghabbour HA, Fun HK. Tandem Aldol-Michael reactions in aqueous diethylamine medium: a greener and efficient approach to dimedone-barbituric acid derivatives. Chem Cent J 2014; 8:9. [PMID: 24485059 PMCID: PMC3924718 DOI: 10.1186/1752-153x-8-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 01/28/2014] [Indexed: 11/15/2022] Open
Abstract
Background Green chemistry is a rapidly developing new field that provides us with a proactive avenue for the sustainable development of future science and technologies. Green chemistry uses highly efficient and environmentally benign synthetic protocols to deliver lifesaving medicines, accelerating lead optimization processes in drug discovery, with reduced unnecessary environmental impact. From this view point, it is desirable to use water instead of organic solvents as a reaction medium, since water is safe, abundant and an environmentally benign solvent. Results A convenient one-pot method for the efficient synthesis of the novel Zwitterion derivatives 4a-pvia a three-component condensation reaction of barbituric acid derivatives 1a,b, dimedone 2, and various aldehydes 3 in the presence of aqueous diethylamine media is described. This new approach is environmentally benign, with clean synthetic procedure, short reaction times and easy work-up procedure which proceeded smoothly to provide excellent yield (88-98%). The synthesized products were characterized by elemental analysis, IR, MS, NMR and CHN analysis. The structure of 4a was further confirmed by single crystal X-ray diffraction. The compound crystallizes in the orthorhombic space group Pbca with α = 14.6669 (5) Å, b = 18.3084 (6) Å, c = 19.0294 (6) Å, α = 90°, β = 90°, = 90°, V = 5109.9 (3) Å3, and Z = 8. The molecules are packed in crystal structure by weak intermolecular C–H⋅ ⋅ ⋅O hydrogen bonding interactions. Conclusions An environmentally benign Aldol-Michael protocol for the synthesis of dimedone-barbituric derivatives using aqueous diethylamine medium is achieved.
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Affiliation(s)
- Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P,O, Box 2455, Riyadh 11451, Saudi Arabia.
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Al-Najjar HJ, Barakat A, Al-Majid AM, Mabkhot YN, Weber M, Ghabbour HA, Fun HK. A greener, efficient approach to Michael addition of barbituric acid to nitroalkene in aqueous diethylamine medium. Molecules 2014; 19:1150-62. [PMID: 24445342 PMCID: PMC6271361 DOI: 10.3390/molecules19011150] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 01/07/2014] [Accepted: 01/10/2014] [Indexed: 11/22/2022] Open
Abstract
An efficient method for the synthesis of a variety of pyrimidine derivatives 3a–t by reaction of barbituric acids 1a,b as Michael donor with nitroalkenes 2a–k as Michael acceptor using an aqueous medium and diethylamine is described. This 1,4-addition strategy offers several advantages, such as using an economic and environmentally benign reaction media, high yields, versatility, and shorter reaction times. The synthesized compounds were identified by 1H-NMR, 13C-NMR, CHN, IR, and MS. The structure of compound 3a was further confirmed by single crystal X-ray structure determination.
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Affiliation(s)
- Hany J Al-Najjar
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Assem Barakat
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Abdullah M Al-Majid
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Yahia N Mabkhot
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Manuel Weber
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Hazem A Ghabbour
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Hoong-Kun Fun
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
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Barakat A, Al-Majid AM, AL-Najjar HJ, Mabkhot YN, Ghabbour HA, Fun HK. An efficient and green procedure for synthesis of rhodanine derivatives by aldol-thia-Michael protocol using aqueous diethylamine medium. RSC Adv 2014. [DOI: 10.1039/c3ra46551a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Al-Majid AM, Barakat A, AL-Najjar HJ, Mabkhot YN, Ghabbour HA, Fun HK. Tandem aldol-Michael reactions in aqueous diethylamine medium: a greener and efficient approach to bis-pyrimidine derivatives. Int J Mol Sci 2013; 14:23762-73. [PMID: 24317435 PMCID: PMC3876076 DOI: 10.3390/ijms141223762] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 11/12/2013] [Accepted: 11/18/2013] [Indexed: 11/16/2022] Open
Abstract
A simple protocol, involving the green synthesis for the construction of novel bis-pyrimidine derivatives, 3a–i and 4a–e are accomplished by the aqueous diethylamine media promoted tandem Aldol-Michael reaction between two molecules of barbituric acid derivatives 1a,b with various aldehydes. This efficient synthetic protocol using an economic and environmentally friendly reaction media with versatility and shorter reaction time provides bis-pyrimidine derivatives with high yields (88%–99%).
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Affiliation(s)
- Abdullah M. Al-Majid
- Department of Chemistry, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mails: (A.M.A.-M.); (H.J.A.-N.); (Y.N.M.)
| | - Assem Barakat
- Department of Chemistry, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mails: (A.M.A.-M.); (H.J.A.-N.); (Y.N.M.)
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426-Ibrahimia, Alexandria 21321, Egypt
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +966-1467-5884; Fax: +966-1467-5992
| | - Hany J. AL-Najjar
- Department of Chemistry, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mails: (A.M.A.-M.); (H.J.A.-N.); (Y.N.M.)
| | - Yahia N. Mabkhot
- Department of Chemistry, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mails: (A.M.A.-M.); (H.J.A.-N.); (Y.N.M.)
| | - Hazem A. Ghabbour
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; E-Mails: (H.A.G.); (H.-K.F.)
| | - Hoong-Kun Fun
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; E-Mails: (H.A.G.); (H.-K.F.)
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Schulz M, Christoffers J. Synthesis of Functionalized Pyridine-2,6-bis(imidazolines) by Ring Transformation of 4-(Aminomethyl)oxazoline Derivatives. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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