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Xu D, Chiaroni A, Largeron M. A One-Pot Regiospecific Synthesis of Highly Functionalized 1,4-Benzodioxin Derivatives from an Electrochemically Induced Diels−Alder Reaction. Org Lett 2005; 7:5273-6. [PMID: 16268556 DOI: 10.1021/ol052146e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] The anodic oxidation of pyrogallol derivatives produces chemically unstable o-quinone heterodienes, which are trapped in situ by enamine dienophiles through regiospecific inverse-electron-demand Diels-Alder reactions. The possibility of introducing variations in both cycloaddition partners gives rise to highly substituted 1,4-benzodioxin cycloadducts with up to five elements of diversity. The reactions proceed under mild conditions with a good efficiency. The methodology should be amenable to the assembly of libraries of biologically relevant heterocycles.
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Kumar S, Flamant-Robin C, Wang Q, Chiaroni A, Sasaki NA. Synthesis of 4-substituted-3-aminopiperidin-2-ones: application to the synthesis of a conformationally constrained tetrapeptide N-acetyl-Ser-Asp-Lys-Pro. J Org Chem 2005; 70:5946-53. [PMID: 16018690 DOI: 10.1021/jo050736k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new and practical synthetic strategy is developed for the synthesis of six-membered lactam-bridged dipeptides, 4-substituted-3-aminopiperidin-2-ones, featuring two key steps: (a) a diastereoselective addition of cuprate to (E)-alpha,beta-unsaturated ester (3) and (b) racemization-free reductive amination. On the basis of this methodology, conformationally constrained tetrapeptide N-acetyl-Ser-Asp-Lys-Pro (AcSDKP) (2) has been successfully synthesized from 3-amino-4-vinylpiperidin-2-one (22).
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Jakubowicz K, Wong YS, Chiaroni A, Bénéchie M, Marazano C. New Polycyclic Diamine Scaffolds from Dimerization of 3-Alkyl-1,4-dihydropyridines in Acidic Medium. J Org Chem 2005; 70:7780-3. [PMID: 16149815 DOI: 10.1021/jo050937o] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] 3-Alkyl-1,4-dihydropyridines dimerize in acidic medium, at low temperature, to give polycyclic imminium salts derivatives that were reduced to afford new polycyclic diamine scaffolds. The reaction can be extended to enantiopure series starting from R-(+)- or S-(-)-1-phenylethylamine. Long exposure of the polycyclic imminium salt intermediates to air moisture at 20 degrees C resulted in formation of new amide derivatives. This is probably due to the addition of water followed by an intramolecular oxido-reduction process.
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Tong HM, Martin MT, Chiaroni A, Bénéchie M, Marazano C. An Approach to the Tricyclic Core of Madangamines Based upon a Biogenetic Scheme. Org Lett 2005; 7:2437-40. [PMID: 15932217 DOI: 10.1021/ol050740i] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A short synthesis of intermediates possessing the tricyclic core of natural madangamines, bioactive alkaloids found in marine sponges, is described. The key reaction entails the condensation of the sodium salt of diethylacetonedicarboxylate with a dihydropyridinium salt derivative. This new approach is modeled on a biogenetic proposal linking madangamines to ircinals, related alkaloids occurring in sponges of the same order.
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Barrière JC, Chiaroni A, Cléophax J, Géro SD, Riche C, Vuilhorgne M. Synthesis of Reactive Intermediates for Natural Cyclopentane Derivatives from (−)-Quinic Acid: Preparation of 11α-hydroxy-13-oxaprostanoic acid. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19810640419] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Dumontet V, Van Hung N, Adeline MT, Riche C, Chiaroni A, Sévenet T, Guéritte F. Cytotoxic flavonoids and alpha-pyrones from Cryptocarya obovata. JOURNAL OF NATURAL PRODUCTS 2004; 67:858-862. [PMID: 15165150 DOI: 10.1021/np030510h] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
One alpha-pyrone, obolactone (1), two chalcones, kurzichalcolactone B (2) and obochalcolactone (3), and two flavanones, oboflavanones A (4) and B (5), have been isolated from the fruits and the trunk bark of Cryptocarya obovata. The structures of the new compounds were elucidated by spectroscopic interpretations. The absolute configuration of obolactone (1) was established by circular dichroism. Obolactone (1) and obochalcolactone (3) display significant activity in in vitro cytotoxic assays against the KB cell line. Biosynthetic pathways for oboflavanones and obochalcolactone are suggested.
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Mota A, Chiaroni A, Langlois N. New Diastereoselective Route to 2-Substitutedcis-(2S,5S)- andtrans-(2S,5R)-5-Alkylpyrrolidines as Indolizidine and Pyrrolizidine Scaffolds. European J Org Chem 2003. [DOI: 10.1002/ejoc.200300393] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Toffano M, Dudot B, Zaparucha A, Royer J, Sevrin M, George P, Chiaroni A. Asymmetric routes towards polyfunctionalized pyrrolidines: application to the synthesis of alkaloid analogues. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0957-4166(03)00592-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Cutri S, Bonin M, Micouin L, Husson HP, Chiaroni A. Practical asymmetric synthesis of 1,2-diamines in the 3-aminoazepane series. J Org Chem 2003; 68:2645-51. [PMID: 12662034 DOI: 10.1021/jo026711s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A simple and versatile method for the enantio- and diastereoselective synthesis of mono- or disubstituted 3-aminoazepanes is described. The key step involves a highly regio- and diastereoselective tandem ring-enlargement/alkylation or reduction process. This novel synthetic route provides enantiomerically pure constrained diamines interesting as scaffolds for medicinal chemistry.
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De Paolis M, Chiaroni A, Zhu J. Synthetic studies on ecteinascidin 743: rapid access to the fully functionalized tetrahydroisoquinoline with a bridged 10-membered sulfur containing macrocycleElectronic supplementary information (ESI) available: spectroscopic data for all new compounds and X-ray data for compound 14. See http://www.rsc.org/suppdata/cc/b3/b309824a/. Chem Commun (Camb) 2003:2896-7. [PMID: 14680229 DOI: 10.1039/b309824a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of tetrahydroisoquinoline with a 1,4-bridged 10-membered sulfur containing macrolactone (5) is described. Phenolic aldolisation, Pictet-Spengler cyclisation of an acid sensitive amino diol under newly developed conditions (LiBr, toluene-TFE, 80 degrees C) and acid promoted intramolecular C-S bond formation leading to a 10-membered cycle are key steps of our synthesis.
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Flamant-Robin C, Wang Q, Chiaroni A, Sasaki N. An efficient method for the stereoselective synthesis of cis -3-substituted prolines: conformationally constrained α-amino acids. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)01405-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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38
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Eljamili H, Auhmani A, Dakir M, Lassaba E, Benharref A, Pierrot M, Chiaroni A, Riche C. Oxydation et addition des dihalocarbènes sur le β-himachalène. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01407-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Chiaroni A, Randriambola L, Riche C, Husson HP. Structure of goniomine, an alkaloid of a new type biogenetically related to indole alkaloids. X-ray analysis of dihydrogoniomine. J Am Chem Soc 2002. [DOI: 10.1021/ja00538a043] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Schiavi B, Ahond A, Al-Mourabit A, Poupat C, Chiaroni A, Gaspard C, Potier P. Synthesis of 5-deazathiogirollines: analogs of a natural antitumor agent. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00383-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Tillequin F, Cachet X, Deguin B, Koch M, Chiaroni A. Synthesis and Structural Assignment of Functionalized 8,9-Diazatricyclo[4.4.0.01,5]decane: A New Tricyclic System Including the Pyridazine Ring. HETEROCYCLES 2002. [DOI: 10.3987/com-01-9427] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Poigny S, Nouri S, Chiaroni A, Guyot M, Samadi M. Total synthesis and determination of the absolute configuration of coscinosulfate. A new selective inhibitor of Cdc25 protein phosphatase. J Org Chem 2001; 66:7263-9. [PMID: 11681936 DOI: 10.1021/jo010154c] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total synthesis of coscinosulfate 1, a metabolite isolated from a sea sponge, starting from (+)-sclareolide 3 is described. The convergent synthesis strategy relies on the coupling of sulfone 21 with the bromide 26. The sulfone fragment 21 was obtained by successive asymmetric aldol reaction with aldehyde 2 to introduce the stereocenters at C-12 and C-13, followed by one-carbon homologation via Horner-Wadsworth-Emmons olefination. The selective sulfatation at C-12 was accomplished through the quinone intermediate 31 obtained by selective oxidation of hydroquinone 30; this, when followed by reduction, furnished the desired coscinosulfate 1. X-ray analysis of the intermediate aldehyde 18 confirmed the proposed structure.
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Jousse-Karinthi C, Riche C, Chiaroni A, Desmaële D. Synthetic Application of Sequential Palladium-Catalyzed Allylic Acetate Alkylation and Michael Addition Carbocyclization: Synthesis of (±)-Dihydroerythramine. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200110)2001:19<3631::aid-ejoc3631>3.0.co;2-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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González-Zamora E, Fayol A, Bois-Choussy M, Chiaroni A, Zhu J. Three component synthesis of oxa-bridged tetracyclic tetrahydroquinolines. Chem Commun (Camb) 2001:1684-5. [PMID: 12240443 DOI: 10.1039/b104317j] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bridged tetracyclic tetrahydroquinoline is synthesized by a novel one-pot three component condensation of an ortho-amino cinnamate, alpha-isocyano acetamide and an aldehyde.
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Tan K, Alvarez R, Nour M, Cavé C, Chiaroni A, Riche C, d'Angelo J. Racemization processes at a quaternary carbon center in the context of the asymmetric Michael reaction. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00926-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Baussanne I, Chiaroni A, Royer J. Asymmetric synthesis of 5-substituted pyrrolidinones via a chiral N-acyliminium equivalent. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00195-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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47
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Khuong-Huu Q, Chiaroni A, Riche C, Nguyen-Ngoc H, Nguyen-Viet K, Khuong-Huu F. New rearranged limonoids from Harrisonia perforata. III. JOURNAL OF NATURAL PRODUCTS 2001; 64:634-637. [PMID: 11374961 DOI: 10.1021/np000471z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three new limonoids, named haperforins C2 (1), F (2), and G (3), were isolated from a sample of Harrisonia perforata leaves collected in Central Vietnam. Their structures were determined by single-crystal X-ray diffraction analyses, and their NMR and mass spectral data are reported.
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Razet R, Thomet U, Furtmüller R, Chiaroni A, Sigel E, Sieghart W, Dodd RH. 5-[1'-(2'-N-Arylsulfonyl-1',2',3',4'-tetrahydroisoquinolyl)]-4, 5-dihydro-2(3H)-furanones: positive allosteric modulators of the GABA(A) receptor with a new mode of action. J Med Chem 2000; 43:4363-6. [PMID: 11087560 DOI: 10.1021/jm001049i] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Croisy-Delcey M, Croisy A, Carrez D, Huel C, Chiaroni A, Ducrot P, Bisagni E, Jin L, Leclercq G. Diphenyl quinolines and isoquinolines: synthesis and primary biological evaluation. Bioorg Med Chem 2000; 8:2629-41. [PMID: 11092548 DOI: 10.1016/s0968-0896(00)00194-2] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The synthesis of a series of 35 substituted 3,4-diphenyl quinolines and isoquinolines is described. The majority of these molecules differ from all other triphenylethylene based antiestrogens by a different spatial location of the aminoalkyl side chain. The binding affinity of the most representative molecules (8, 9, 19, 20, 21, 23 and 25), including analogues 8 and 21 without the side chain, for the estrogen receptor alpha (ER) was determined. The ability of these molecules to induce the progesterone receptor was also studied. Antiproliferative activity was evaluated on MCF-7 human breast cancer cells, while intrinsic cytotoxic/cytostatic properties resulting from interaction with other targets than ER were assayed on L1210 murine leukemia cells. Introduction of an aminoalkylamino side chain at carbon 2 confers strong cytotoxic properties to diphenylquinolines 9 and 10 as well as pure antiestrogenic activities. However, cytotoxicity is so high with respect to antiestrogenicity that the latter was clearly observable only in one case (9b). The structure of compound 9b was determined by X-ray crystallography. Molecular modeling of its docking within the hormone-binding domain of the receptor was subsequently undertaken. According to our results, the design of molecules with the side chain bound to the ethylene part of the triphenyl ethylene skeleton might generate compounds of potential pharmacological interest.
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50
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Poupon E, Luong BX, Chiaroni A, Kunesch N, Husson HP. New building blocks for tackling the synthesis of polyhydroxylated piperidines: expeditious synthesis of amino derivatives in the 1-deoxynojirimycin series. J Org Chem 2000; 65:7208-10. [PMID: 11031051 DOI: 10.1021/jo000434c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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