51
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Karthikeyan NS, Sathiyanarayanan K, Aravindan PG, Rathore RS. (3E,5E)-1-Benzyl-3,5-dibenzyl-idenepiperidin-4-one. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o2775. [PMID: 21578368 PMCID: PMC2971257 DOI: 10.1107/s1600536809037659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Accepted: 09/17/2009] [Indexed: 11/27/2022]
Abstract
In the title compound, C26H23NO, C—H⋯O hydrogen bonds generate a ribbon structure along the a axis. These ribbons further assemble into a one-dimensional sheet parallel to the ac plane via C—H⋯π interactions. The piperidin-4-one ring adopts a sofa conformation with the 1-benzyl group in the equatorial position, and the 3- and 5-phenyl substituents stretched out on either side. The benzylidene units adopt E configurations and the 1-benzyl group is disposed towards the 3- substituent of the piperidin-4-one ring.
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52
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Rathore RS, Karthikeyan NS, Sathiyanarayanan K, Aravindan PG. (3E,5E)-1-Benzyl-3,5-bis-(2-fluoro-benzyl-idene)piperidin-4-one. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o2667. [PMID: 21578277 PMCID: PMC2970975 DOI: 10.1107/s1600536809039609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 09/29/2009] [Indexed: 11/23/2022]
Abstract
The inversion-related molecules of the title compound, C26H21F2NO, associate into closed dimeric subunits via co-operative C—H⋯π interactions. Two non-classical C—H⋯O and one C—H⋯N intramolecular hydrogen bonds are also found in the crystal structure. The piperidin-4-one ring adopts a sofa conforamtion with the 1-benzyl group in the equatorial position, and the equiplanar fluorophenyl substituents in the 3- and 5-positions stretched out on either side. The 1-benzyl group is disposed towards the substituent in the 6th position of the piperidin-4-one ring. The 3,5-diene units possess E configurations.
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53
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Rostom SAF, Hassan GS, El-Subbagh HI. Synthesis and Biological Evaluation of Some Polymethoxylated Fused Pyridine Ring Systems as Antitumor Agents. Arch Pharm (Weinheim) 2009; 342:584-90. [DOI: 10.1002/ardp.200900062] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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54
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Design, synthesis and bioevaluation of novel maleamic amino acid ester conjugates of 3,5-bisarylmethylene-4-piperidones as cytostatic agents. Bioorg Med Chem Lett 2009; 19:6364-7. [PMID: 19819135 DOI: 10.1016/j.bmcl.2009.09.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Revised: 09/15/2009] [Accepted: 09/17/2009] [Indexed: 11/22/2022]
Abstract
A novel series of maleamic amino acid ester conjugates of 3,5-bisarylmethylene-4-piperidones were prepared to investigate the efficacy of micronutrient conjugation in enhancing cytotoxic potency by improving selectivity and delivery. These compounds, prepared as anticancer agents, were expected to demonstrate enhanced selectivity towards malignant cells through the inhibition of topoisomerase IIalpha via protein thiolation. The cytostatic effects of these compounds were evaluated against three cell lines, namely murine L1210 leukemia cells, human Molt 4/C8 and CEM T-lymphocyte cells. All compounds were found to have greater potency than the reference drug melphalan. Several compounds were found to potently inhibit topoisomerase IIalpha and displayed cytostatic activity in the nanomolar range.
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55
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Tongwa P, Kinnibrugh TL, Kicchaiahgari GR, Khrustalev VN, Timofeeva TV. From small structural modifications to adjustment of structurally dependent properties: 1-methyl-3,5-bis[(E)-2-thienylidene]-4-piperidone and 3,5-bis[(E)-5-bromo-2-thienylidene]-1-methyl-4-piperidone. Acta Crystallogr C 2009; 65:o155-9. [PMID: 19346612 PMCID: PMC2665971 DOI: 10.1107/s0108270109008336] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2008] [Accepted: 03/06/2009] [Indexed: 11/10/2022] Open
Abstract
The molecules of the title compounds, C(16)H(15)NOS(2), (I), and C(16)H(13)Br(2)NOS(2), (II), are E,E-isomers and consist of an extensive conjugated system, which determines their molecular geometries. Compound (I) crystallizes in the monoclinic space group P2(1)/c. It has one thiophene ring disordered over two positions, with a minor component contribution of 0.100 (3). Compound (II) crystallizes in the noncentrosymmetric orthorhombic space group Pca2(1) with two independent molecules in the unit cell. These molecules are related by a noncrystallographic pseudo-inversion center and possess very similar geometries. The crystal packings of (I) and (II) have a topologically common structural motif, viz. stacks along the b axis, in which the molecules are bound by weak C-H...O hydrogen bonds. The noncentrosymmetric packing of (II) is governed by attractive intermolecular Br...Br and Br...N interactions, which are also responsible for the very high density of (II) (1.861 Mg m(-3)).
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Affiliation(s)
- Paul Tongwa
- Department of Chemistry, New Mexico Highlands University, Las Vegas, NM 87701, USA
| | | | | | - Victor N. Khrustalev
- Department of Chemistry, New Mexico Highlands University, Las Vegas, NM 87701, USA
- X-ray Structural Centre, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, B-334 Moscow 119991, Russian Federation
| | - Tatiana V. Timofeeva
- Department of Chemistry, New Mexico Highlands University, Las Vegas, NM 87701, USA
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56
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Rajeswari K, Pandiarajan K, Gayathri P, Thiruvalluvar A. 1-Methyl-3,5-bis-[(E)-(3-methyl-2-thienyl)methyl-ene]piperidin-4-one monohydrate. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o885. [PMID: 21582594 PMCID: PMC2968964 DOI: 10.1107/s1600536809010393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Accepted: 03/20/2009] [Indexed: 11/10/2022]
Abstract
In the title molecule, C18H19NOS2·H2O, the piperidine ring adopts an envelope conformation with the methyl substituent in an equatorial position. Each of the olefinic double bonds has an E configuration. The dihedral angle between the two thiophene rings is 6.04 (14)°. The water molecule forms two donor interactions, one with the carbonyl O atom and the other to the hetero N atom. The centrosymmetric {C18H19NOS2·H2O}2 pairs thus formed are linked into a supramolecular chain via C—H⋯Owater contacts.
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57
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Das U, Sharma RK, Dimmock JR. 1,5-diaryl-3-oxo-1,4-pentadienes: a case for antineoplastics with multiple targets. Curr Med Chem 2009; 16:2001-20. [PMID: 19519378 PMCID: PMC3326067 DOI: 10.2174/092986709788682218] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A number of organic molecules which contain the 1,5-diaryl-3-oxo-1,4-pentadienyl group, referred to hereafter as the dienone moiety, have antineoplastic properties. Emphasis is made on the attachment of this structural moiety to several molecular scaffolds, namely piperidines, N-acylpiperidines, cycloalkanes and 3,4-dihydro-1H-napthalenes. Many of these compounds are potent cytotoxins having micromolar and nanomolar IC(50) values towards a wide range of neoplastic and transformed cells. On occasions, greater toxicity towards neoplasms than normal cells has been demonstrated. A number of these compounds have in vivo anticancer properties and in general excellent tolerability in rodents is demonstrated. The way in which a number of physicochemical properties such as redox potentials, torsion angles, atomic charges and logP values govern cytotoxic potencies are presented. The importance of the shapes of different compounds as determined by molecular modeling in contributing to antineoplastic properties is outlined. Arguments are presented in favour of designing antineoplastics which have multiple sites of action in contrast to those bioactive molecules which have only one molecular target. A number of compounds which possess the dienone group have different modes of action some of which are chronicled in this review, such as inducing apoptosis, affecting respiration in mitochondria, inhibiting macromolecular biosynthesis and both inhibiting and stimulating certain enzymes. Other important properties of these compounds are discussed including their anti-angiogenic, MDR-revertant and antioxidant properties. It is hoped that this eulogy of the importance of the dienone group will encourage researchers to consider incorporating this structural unit into candidate cytotoxins in the future.
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Affiliation(s)
- U Das
- Drug Design and Discovery Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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58
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Pati HN, Das U, Das S, Bandy B, De Clercq E, Balzarini J, Kawase M, Sakagami H, Quail JW, Stables JP, Dimmock JR. The cytotoxic properties and preferential toxicity to tumour cells displayed by some 2,4-bis(benzylidene)-8-methyl-8-azabicyclo[3.2.1] octan-3-ones and 3,5-bis(benzylidene)-1-methyl-4-piperidones. Eur J Med Chem 2009; 44:54-62. [PMID: 18468733 PMCID: PMC3276583 DOI: 10.1016/j.ejmech.2008.03.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2007] [Revised: 03/05/2008] [Accepted: 03/06/2008] [Indexed: 12/29/2022]
Abstract
This study demonstrated that replacement of the axial protons on the C2 and C6 atoms of various 1-methyl-3,5-bis(benzylidene)-4-piperidones 3 by a dimethylene bridge leading to series 2 lowered cytotoxic potencies. Four compounds 2a and 3a-c emerged as lead molecules based on their toxicity towards different neoplasms and their selective toxicity for malignant rather than normal cells. Some possible reasons for the disparity between the IC(50) values in the two series of compounds are presented based on molecular modeling, logP values and respiration in rat liver mitochondria.
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Affiliation(s)
- Hari N. Pati
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Umashankar Das
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Swagatika Das
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Brian Bandy
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Erik De Clercq
- Rega Institute of Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Jan Balzarini
- Rega Institute of Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Masami Kawase
- Faculty of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790 8578, Japan
| | - Hiroshi Sakagami
- Division of Pharmacology, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Saitama 350 0283, Japan
| | - J. Wilson Quail
- Saskatoon Structural Sciences Centre, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - James P. Stables
- National Institute of Neurological Disorders and Stroke, 6001 Executive Boulevard, Rockville, MD 20852, USA
| | - Jonathan R. Dimmock
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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59
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Das U, Molnár J, Baráth Z, Bata Z, Dimmock JR. 1-[4-(2-Aminoethoxy)phenylcarbonyl]-3,5-bis-(benzylidene)-4-oxopiperidines: a novel series of highly potent revertants of P-glycoprotein associated multidrug resistance. Bioorg Med Chem Lett 2008; 18:3484-7. [PMID: 18513966 PMCID: PMC3310923 DOI: 10.1016/j.bmcl.2008.05.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2008] [Revised: 05/06/2008] [Accepted: 05/09/2008] [Indexed: 10/22/2022]
Abstract
The 1-[4-(2-aminoethoxy)phenylcarbonyl]-3,5-bis-(benzylidene)-4-oxopiperidines 5-8 are a novel cluster of highly potent P-glycoprotein dependent multidrug resistance (MDR) revertants. Using a concentration of 4mug/mL, these compounds possess 11-43 times the potency of verapamil in reversing MDR in murine L-5178 lymphoma cells transfected with the human MDR1 gene. Structure-activity relationships reveal that the attachment of the N-aroyl group to various 3,5-bis(benzylidene)-4-piperidones is essential for MDR reversal to occur. In terms of potencies, the 1-piperidinyl group is the preferred terminal amine while the 4-methyl and 4-chloro substituents are the optimal groups for placement in the benzylidene aryl rings.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/biosynthesis
- ATP Binding Cassette Transporter, Subfamily B, Member 1/drug effects
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- Animals
- Antineoplastic Agents/chemical synthesis
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/pharmacology
- Cell Line, Tumor
- Drug Design
- Drug Resistance, Multiple/drug effects
- Drug Resistance, Multiple/genetics
- Drug Resistance, Neoplasm/drug effects
- Drug Resistance, Neoplasm/genetics
- Drug Screening Assays, Antitumor
- Humans
- Lymphoma/drug therapy
- Mice
- Molecular Structure
- Piperidones/chemical synthesis
- Piperidones/chemistry
- Piperidones/pharmacology
- Structure-Activity Relationship
- Transfection/methods
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Affiliation(s)
- Umashankar Das
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Sask., Canada S7N 5C9
| | - Joseph Molnár
- Institute of Medical Microbiology and Immunology, University of Szeged, Szeged H-6720, Hungary
| | - Zoltán Baráth
- Institute of Medical Microbiology and Immunology, University of Szeged, Szeged H-6720, Hungary
| | - Zsuzsanna Bata
- Department of Dermatology, University of Szeged, Szeged H-6720, Hungary
| | - Jonathan R. Dimmock
- College of Pharmacy and Nutrition, University of Saskatchewan, 110 Science Place, Saskatoon, Sask., Canada S7N 5C9
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60
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N-alkylated 3,5-bis(arylidene)-4-piperidones. Synthetic approaches, X-ray structure and anticancer activity. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450315] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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61
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Das U, Das S, Bandy B, Stables JP, Dimmock JR. N-Aroyl-3,5-bis(benzylidene)-4-piperidones: a novel class of antimycobacterial agents. Bioorg Med Chem 2008; 16:3602-7. [PMID: 18282710 DOI: 10.1016/j.bmc.2008.02.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Revised: 02/01/2008] [Accepted: 02/05/2008] [Indexed: 10/22/2022]
Abstract
A number of 3,5-bis(benzylidene)-4-piperidones 1 and some N-4-(2-aminoethoxy)phenylcarbonyl analogs 3-6 display excellent in vitro antimycobacterial properties. In particular, 1c and 6d are potent antimycobacterials which are well tolerated in mice and are identified as important lead molecules. The nature of both the benzylidene aryl rings and the terminal basic groups which affect the antimycobacterial potencies and the absence of neurotoxic side effects were identified. Several representative compounds stimulated respiration in mitochondria isolated from rat liver and this effect was not caused by the swelling of these organelles. Various guidelines for the creation of further related novel antimycobacterial agents are provided.
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Affiliation(s)
- Umashankar Das
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Sask., Canada S7N 5C9
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