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Chikh Alard I, Soubhye J, Berger G, Gelbcke M, Spassov S, Amighi K, Goole J, Meyer F. Triple-stimuli responsive polymers with fine tuneable magnetic responses. Polym Chem 2017. [DOI: 10.1039/c7py00218a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The formation of multi-stimuli responsive polymers exhibiting magnetic, pH and light sensitivity is reported.
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Affiliation(s)
- I. Chikh Alard
- Laboratory of Pharmaceutics and Biopharmaceutics
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - J. Soubhye
- Laboratory of Therapeutic Chemistry
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - G. Berger
- Laboratory of Therapeutic Chemistry
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - M. Gelbcke
- Laboratory of Therapeutic Chemistry
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - S. Spassov
- Institut Royal Météorologique
- Centre de Physique du Globe
- 5670 Dourbes (Viroinval)
- Belgium
| | - K. Amighi
- Laboratory of Pharmaceutics and Biopharmaceutics
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - J. Goole
- Laboratory of Pharmaceutics and Biopharmaceutics
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - F. Meyer
- Laboratory of Biopolymers and Supramolecular Nanomaterials
- Faculty of Pharmacy
- Université Libre de Bruxelles
- 1050 Brussels
- Belgium
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Ionescu A, Dufrasne F, Gelbcke M, Jabin I, Kiss R, Lamoral-Theys D. DYRK1A kinase inhibitors with emphasis on cancer. Mini Rev Med Chem 2012; 12:1315-29. [PMID: 23016545 DOI: 10.2174/13895575112091315] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 05/22/2012] [Accepted: 05/25/2012] [Indexed: 01/12/2023]
Abstract
Various types of cancers (including gliomas, melanomas, and esophageal, pancreas and non-small-cell lung cancers) display intrinsic resistance to pro-apoptotic stimuli, such as conventional chemotherapy and radiotherapy, and/or the activation of a multidrug resistance phenotype, which are major barriers to effective treatment and lead to poor patient prognosis. The DYRK1A kinase is directly implicated in the resistance of cancer cells to pro-apoptotic stimuli and drives several pathways that enhance proliferation, migration, and the reduction of cell death, leading to very aggressive biological behavior in cancer cell populations. The DYRK1A kinase is also implicated in neurological diseases and in neoangiogenic processes. Thus, the DYRK1A kinase is of great interest for both cancer and neuroscience research. During the last decade, numerous compounds that inhibit DYRK1A have been synthesized. The present review discusses the available molecules known to interfere with DYRK1A activity and the implications of DYRK1A in cancer and other diseases and serves as a rational analysis for researchers who aim to improve the anti-DYRK1A activity of currently available compounds.
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Affiliation(s)
- A Ionescu
- Laboratoire de Chimie Organique, Faculté des Sciences, Université Libre de Bruxelles (ULB), Brussels, Belgium
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Lallemand B, Gelbcke M, Dubois J, Prevost M, Jabin I, Kiss R. Structure-Activity Relationship Analyses of Glycyrrhetinic Acid Derivatives as Anticancer Agents. Mini Rev Med Chem 2011; 11:881-7. [DOI: 10.2174/138955711796575443] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2010] [Accepted: 07/04/2011] [Indexed: 11/22/2022]
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Figeys HP, Gelbcke M. Composés Oléfiniques et Acétyléniques. IV. Nouvelles Synthèses du 1,3,5-Hexatriene; Électrodimérisation de L'Acroléine sur un Couple Zinc-Cuivre. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19740830909] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Figeys HP, Gelbcke M. Composés oléfiniques et acétyléniques. III. Synthèse et stéréochimie de dérivés polybromés hexadieniques; obtention du 1,5-hexadiyne-3-ene. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19740830908] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gelbcke M, Masiala-Tsobo C, Dumont L, Parmentier F, Grimée R. Spectres RMN -1H et -13C de Quelques Quinoléines et Quinaldines Mono et Disulfonees. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19820910709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Tytgat D, Gelbcke M. Spectres RMN-1H Et-13C De Phenyl-1-Propanediamines-1,2 Derives De L'Ephedrine Et De Leurs Imidazolidines. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19890980403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gelbcke M, Grimée R, Lejeune R, Thunus L, Dejardin JV. Spectres RMN-1 H et-13 C Des Acides Mercapto-2 Pyridinecarboxylique-3, Mercapto-3 Pyridinecarboxylique-2 et de Leurs Derives Methyles Correspondants. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19830920106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Masiala-Tsobo C, Gelbcke M, Dumont L, Parmentier F, Grimée R. Isolement par Chromatographie Liquide a Haute Performance Préparative D'Appariement D'Ions et Identification des Constituants Majeurs du Jaune de Quinoléine (C.I. 47005). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19820910308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Tytgat D, Gelbcke M. Stéréochimie de (2S, 4S, 5R;2S, 4S, 5S)- et (2R, 4S, 5R;2R, 4S, 5S)-2-alkyl-1,3,4-triméthyl-5-phénylimidazolidines déterminée par RMN-−1H et -−13C. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19900990507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Deleers M, Gelbcke M, Malaisse WJ. Formation of hybrid complexes between Ca and the ionophores bromolasalocid (Br-X537A) and A23187. Proc Natl Acad Sci U S A 2010; 78:279-82. [PMID: 16592950 PMCID: PMC319036 DOI: 10.1073/pnas.78.1.279] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The ionophores A23187 and bromolasalocid (Br-X537A) acted synergistically in translocating Ca(2+) from an aqueous into an organic immiscible phase or in mediating Ca(2+) transport across the organic phase, the effects obtained in the simultaneous presence of both ionophores being greater than those expected from a summation of the individual effects of each ionophore. The nuclear magnetic resonance spectrum obtained when the complexation of Ca(2+) occurred in the presence of both ionophores differed strikingly from the individual spectra obtained with the A23187-Ca and Br-X537A-Ca complexes. These findings indicate that the two ionophores are able to form hybrid complexes with Ca(2+).
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Affiliation(s)
- M Deleers
- Laboratory of Experimental Medicine (School of Medicine), Brussels Free University, Brussels, Belgium B-1000
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Van Antwerpen P, Dubois J, Gelbcke M, Neve J. The Reactions of Oxicam and Sulfoanilide Non Steroidal Anti-Inflammatory Drugs with Hypochlorous Acid: Determination of the Rate Constants with an Assay Based on the Competition with Para-aminobenzoic Acid Chlorination and Identification of Some Oxidation Products. Free Radic Res 2009; 38:251-8. [PMID: 15129733 DOI: 10.1080/10715760310001659404] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Hypochlorous acid (HOCl) is an oxygen-derived species involved in physiological processes related to the defence of the organism that may cause adverse effects when its production is insufficiently controlled. In order to examine its reactivity with potential scavenging molecules from the non steroidal anti-inflammatory drugs (NSAIDs) family, a competition assay based on para-aminobenzoic acid (PABA) chlorination was developed. The original optimised in vitro fluorimetric procedure offered the possibility to determine rate constants (ks) for the reaction with HOCl in physiologically relevant conditions. The specificity of the system was improved by a liquid chromatography (LC) which allows the separation of the drugs and their oxidation products. After determination of the rate constant for PABA chlorination by HOCl (mean +/- SD in M(-1) s(-1): 4.3 +/- 0.3 x 10(3)), the applied mathematical model for a chemical competition permits to obtain linear curves from competition studies between several NSAIDs and PABA. Their slopes provided the following rate constants for the different studied drugs: tenoxicam: 4.0 +/- 0.7 x 10(3), piroxicam: 3.6 +/- 0.7 x 10(3), lornoxicam: 4.3 +/- 0.7 x 10(3), meloxicam: 1.7 +/- 0.3 x 10(4), nimesulide: 2.3 +/- 0.6 x 10(2). Meloxicam therefore reacted significantly faster than the other oxicams and nimesulide, which is the weakest scavenger of the studied series. The identification of some of the oxidation products by NMR or MS permitted to explore the reaction mechanism and to examine some aspects of the structure/activity relationships for the molecules of the same chemical family.
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Affiliation(s)
- P Van Antwerpen
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Université Libre de Bruxelles, Bld du Triomphe, Campus Plaine 205/5, B-1050 Brussels, Belgium
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Looze Y, Gillet L, Deconinck M, Leonis J, Gelbcke M. Carbon-13 Nuclear Magnetic Resonance Study of 5′-Substituted-5′-Oeoxyadenosine Derivatives. ANAL LETT 2006. [DOI: 10.1080/00032718008078008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kauffmann JM, Vire JC, Gelbcke M, Patriarche GJ. Identification Des Produits De La Reduction Electrochimique d'Un Nouvel Antiinflammatoire: Le Piroxicam. ANAL LETT 2006. [DOI: 10.1080/00032718408059847] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Diouf O, Gadeau S, Chellé F, Gelbcke M, Talaga P, Christophe B, Gillard M, Massingham R, Guyaux M. A new series of M3 muscarinic antagonists based on the 4-amino-piperidine scaffold. Bioorg Med Chem Lett 2002; 12:2535-9. [PMID: 12182854 DOI: 10.1016/s0960-894x(02)00487-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A series of 4-amino-piperidine containing molecules have been synthesized and structure-affinity relationship toward the M3-muscarinic receptor has been investigated. Chemical modulations provided molecules with K(i) for the human M3-R up to 1 nM with variable selectivity (3- to 40-fold) over the human M2-R. Compounds 2 (pA(2)=8.3, 8.6) demonstrates in vitro on guinea pig bladder and ileal strips potent anticholinergic properties and tissue selectivity.
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Affiliation(s)
- O Diouf
- Laboratoire de Chimie Pharmaceutique Organique, Université Libre de Bruxelles, Institut de Pharmacie, Campus Plaine CP205/5, Boulevard du Triomphe, B-1050, Bruxelles, Belgium
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Badolo L, Gelbcke M, Dubois J, Hanocq M. Synthesis and cytotoxicity studies of new analogues of polyamines. Pharmazie 1998; 53:15-9. [PMID: 9476255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In order to regulate simultaneously the biosynthesis and the transport of natural polyamines, the synthesis of a series of N-methylated analogues of N,N1-Bis(benzyl)-alkanediamines (propanediamine and butanediamine) was achieved and the cytotoxicity of these compounds on the P388D1 cell line was determined. Experiments were conducted in a growth culture medium 20 microM of 2-mercaptoethanol or 0.1 mM of aminoguanidine. Their cytotoxic effects were compared to those obtained under the same conditions with natural polyamines known as toxic compounds at high concentrations. The IC50 of each compound was found very similar for all experimental conditions (IC50 approximately 150 microM) at the opposite of spermidine and spermine which were less toxic (IC50 > 500 microM) when cells were grown in the presence of aminoguanidine (a specific inhibitor of fetal calf serum's PAO). The DL-difluoromethylornithine (DFMO) and MDL 72527DA, two well known inhibitors of ornithine decarboxylase (ODC) and Polyamine Oxidase (PAO) respectively, had no toxicity on the P388D1 cells compared to our compounds. Our most toxic compound was N1,N4-Bis(benzyl)-N1,N4-bis(methyl)-1,4-butanediamine (6) with an IC50 of 127 +/- 3 microM (in culture medium alone). The synthesis of the beta-aminothioether derivative of N-benzylputrescine (11) and the beta-aminothiol derivative of N-benzylspermidine (13) were also related. The Compound 11 was tested against the P388D1 cells, and did not show any cytotoxic effect. The N-methyl derivatives should give the advantage to be used at low concentrations than those used to test the DFMO.
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Affiliation(s)
- L Badolo
- Laboratoire de Chimie Bioanalytique de Toxicologie et de Chimie Physique Appliquée, Université Libre de Bruxelles, Belgique
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Smith DF, Jensen PN, Gelbcke M, Tytgat D. Effects of 3,N,N'-trimethyl-2-phenyl-1,4-piperazine diastereomers on monoamine uptake and monoamine oxidase in rat brain. J Neural Transm (Vienna) 1992; 88:177-85. [PMID: 1418859 DOI: 10.1007/bf01244731] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The diastereomers of 3,N,N'-trimethyl-2-phenyl-1,4-piperazine dihydrochloride (TPP) were tested for their effects on NA, DA and 5-HT uptake in synaptosomes prepared from hypothalamus, corpus striatum, and frontal cortex, respectively. The diastereomers differed with respect to their inhibitory properties. (2 R, 3 R)-TPP was more potent than the other diastereomers on NA and DA uptake, whereas (2 S, 3 S)-TPP was least potent. In contrast, the (2 S, 3 S)- and (2 S, 3 R)-diastereomers of TPP were more potent than (2 R, 3 R)- and (2 R, 3 S)-TPP as inhibitors of 5-HT uptake. None of the diastereomers affected monoamine oxidase activity. The findings show that the diastereomers of TPP interact stereoselectively with neuronal mechanisms for monoamine uptake, and that the (S)-configuration at the 2 carbon is important for inhibitory actions of TPP on 5-HT uptake.
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Affiliation(s)
- D F Smith
- Psychopharmacology Research Unit, Psychiatric Hospital, Risskov, Denmark
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Tytgat D, Gelbcke M, Smith DF. Convenient synthesis of 1-phenyl-1,2-propanediamines. Preliminary pharmacological results. Pharmazie 1990; 45:835-6. [PMID: 2100335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel synthesis of (1R,2S)- and (1S,2S)-1-phenyl-1,2-propanediamines by highly regioselective and stereo-specific opening of chiral aziridines is reported. This method permits the synthesis of optically pure diastereomers. A hypothermic effect is observed after intracerebroventricular injection in rats.
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Affiliation(s)
- D Tytgat
- Department of Pharmaceutical Organic Chemistry, Free University of Brussels, Belgium
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Gallo B, Alonso RM, Lete E, Badía MD, Patriarche GJ, Gelbcke M. Acid catalyzed hydrolysis of brotizolam, a thienotriazolodiazepine: Spectroscopic study. J Heterocycl Chem 1988. [DOI: 10.1002/jhet.5570250332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Deleers M, Gelbcke M, Malaisse WJ. Gliclazide- and glibenclamide-mediated transport of Pr3+ across an artificial lipid membrane. Arch Int Pharmacodyn Ther 1983; 262:313-4. [PMID: 6409019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Deleers M, Brasseur R, Gelbcke M, Malaisse WJ. Homologous and hybrid calcium complexes of A23187 and hypoglycemic sulfonylureas: nuclear magnetic resonance and conformational analysis. J Inorg Biochem 1982; 16:215-25. [PMID: 6809893 DOI: 10.1016/s0162-0134(00)80108-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Hypoglycemic sulfonylureas (e.g., gliclazide) are able to transport calcium across hydrophobic domains. Gliclazide and the ionophore A23187 act synergistically upon calcium transport. One calcium atom is complexed by either two molecules of sulfonylureas (or A23187) or one molecule each of sulfonylurea and A23187; the existence of such hybrid complexes has been documented by nuclear magnetic resonance. Conformation analysis of the calcium-gliclazide complex suggests close apposition of the toluyl groups in the gliclazide molecules.
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Deleers M, Couturier E, Mahy M, Gelbcke M, Malaisse WJ. Ionophoretic property of hypoglycemic sulfonylureas: competition between H+ and Ca2+. Ann Endocrinol (Paris) 1981; 42:297-9. [PMID: 7316466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Gillet L, Looze Y, Deconinck M, Léonis J, Gelbcke M. S-Adenosyl-L-homocysteine and structurally related molecules: synthesis and analysis of the carbon-13 nuclear magnetic resonance spectra [proceedings]. Arch Int Physiol Biochim 1979; 87:623-4. [PMID: 93457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Gelbcke M, Dorlet C. [Detection of isomers in dextromoramide and in some of its derivatives by spectrofluorimetry (author's transl)]. J Pharm Belg 1977; 32:561-8. [PMID: 612699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Gelbcke M, Dorlet C. [Fluorimetric assay of dihydroergotamine (author's transl)]. J Pharm Belg 1977; 32:143-8. [PMID: 894474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Gelbcke M, Lagrange G. Spectres RMN- 13C de Quelques Medicaments a Action Parasymatholytique Peripferique Derives du 1,3-Propanol. ANAL LETT 1977. [DOI: 10.1080/00032717708067857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Gelbcke M. [A quantitative fluorimetric reaction for trihexphenidyl hydrochloride and some of its derivatives (author's transl)]. J Pharm Belg 1976; 31:397-402. [PMID: 978386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Figeys HP, Gelbcke M. Olefinic and acetylenic compounds. I. Improved simple synthesis of (18)annulene; new stereospecific synthesis of 1,5-hexadiyne-3-ene cis. Tetrahedron Lett 1970:5139-42. [PMID: 5501333 DOI: 10.1016/s0040-4039(00)96960-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Martin R, Flammang-Barbieux M, Cosyn J, Gelbcke M. 1-Synthesis of octa- and nonahelicenes. 2-New syntheses of hexa- and heptahelicenes. 3-Optical rotation and O.R.D. of heptahelicene. Tetrahedron Lett 1968. [DOI: 10.1016/s0040-4039(01)99095-1] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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