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Lombardo M, Cerisoli L, Manoni E, Montroni E, Quintavalla A, Trombini C. Properties and Reactivity of Conformationally Constrained Bicyclic Diarylprolinol Silyl Ethers as Organocatalysts. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402732] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Lombardo M, Sonawane DP, Quintavalla A, Trombini C, Dhavale DD, Taramelli D, Corbett Y, Rondinelli F, Fattorusso C, Persico M, Taglialatela-Scafati O. Optimized Synthesis and Antimalarial Activity of 1,2-Dioxane-4-carboxamides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301394] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Quintavalla A, Lanza F, Montroni E, Lombardo M, Trombini C. Organocatalytic Conjugate Addition of Nitroalkanes to 3-Ylidene Oxindoles: A Stereocontrolled Diversity Oriented Route to Oxindole Derivatives. J Org Chem 2013; 78:12049-64. [DOI: 10.1021/jo402099p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Di Fusco M, Quintavalla A, Trombini C, Lombardo M, Roda A, Guardigli M, Mirasoli M. Preparation and Characterization of Thermochemiluminescent Acridine-Containing 1,2-Dioxetanes as Promising Ultrasensitive Labels in Bioanalysis. J Org Chem 2013; 78:11238-46. [DOI: 10.1021/jo401683r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Bottoni A, Lombardo M, Miscione GP, Montroni E, Quintavalla A, Trombini C. Electrosteric Activation by using Ion-Tagged Prolines: A Combined Experimental and Computational Investigation. ChemCatChem 2013. [DOI: 10.1002/cctc.201300399] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Quintavalla A, Lombardo M, Sanap SP, Trombini C. A New Henry/Michael/Retro-Henry/Henry Domino Sequence Promoted by Bifunctional Organocatalysts. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201135] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Roda A, Di Fusco M, Quintavalla A, Guardigli M, Mirasoli M, Lombardo M, Trombini C. Dioxetane-Doped Silica Nanoparticles as Ultrasensitive Reagentless Thermochemiluminescent Labels for Bioanalytics. Anal Chem 2012; 84:9913-9. [DOI: 10.1021/ac302306u] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Montroni E, Lombardo M, Quintavalla A, Trombini C, Gruttadauria M, Giacalone F. A Liquid-Liquid Biphasic Homogeneous Organocatalytic Aldol Protocol Based on the Use of a Silica Gel Bound Multilayered Ionic Liquid Phase. ChemCatChem 2012. [DOI: 10.1002/cctc.201200125] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Chiarucci M, Lombardo M, Trombini C, Quintavalla A. Enantioselective Conjugate Addition of Nitroalkanes to Alkylidenemalonates Promoted by Thiourea-Based Bifunctional Organocatalysts. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100732] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Persico M, Quintavalla A, Rondinelli F, Trombini C, Lombardo M, Fattorusso C, Azzarito V, Taramelli D, Parapini S, Corbett Y, Chianese G, Fattorusso E, Taglialatela-Scafati O. A new class of antimalarial dioxanes obtained through a simple two-step synthetic approach: rational design and structure-activity relationship studies. J Med Chem 2011; 54:8526-40. [PMID: 22054038 DOI: 10.1021/jm201056j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new series of simple endoperoxides, characterized by a 3-methoxy-1,2-dioxane scaffold, was designed on the basis of a previously developed pharmacophore. Through a simplified and versatile scheme of synthesis, which utilizes cheap and commercially available starting materials, it was possible to obtain several structurally and stereochemically different compounds that were tested against P. falciparum. Most of compounds showed antimalarial activity in the low micromolar range and no cellular toxicity, all being significantly more active on chloroquine resistant (CQ-R) than on chloroquine sensitive (CQ-S) strains. Resulting structure-activity relationships were analyzed by means of experimental and computational techniques, validating our design rationale and tailoring it for the new scaffold. Our study demonstrated that according to the hypothesized mechanism of action, the antimalarial activity can be improved through rational structural modifications, paving the way for the development of new simplified antimalarial endoperoxides.
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Montroni E, Sanap SP, Lombardo M, Quintavalla A, Trombini C, Dhavale DD. A New Robust and Efficient Ion-Tagged Proline Catalyst Carrying an Amide Spacer for the Asymmetric Aldol Reaction. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100595] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Galletti P, Cocuzza CEA, Pori M, Quintavalla A, Musumeci R, Giacomini D. Antibacterial Agents and Cystic Fibrosis: Synthesis and Antimicrobial Evaluation of a Series of N-Thiomethylazetidinones. ChemMedChem 2011; 6:1919-27. [DOI: 10.1002/cmdc.201100282] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 07/07/2011] [Indexed: 01/29/2023]
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Galletti P, Emer E, Gucciardo G, Quintavalla A, Pori M, Giacomini D. Chemoenzymatic synthesis of (2S)-2-arylpropanols through a dynamic kinetic resolution of 2-arylpropanals with alcohol dehydrogenases. Org Biomol Chem 2010; 8:4117-23. [PMID: 20625608 DOI: 10.1039/c005098a] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We applied Horse Liver Alcohol Dehydrogenase (HLADH) to the enantioselective synthesis of six (2S)-2-arylpropanols, useful intermediates in the synthesis of Profens. The influence of substrate structure and reaction conditions on yields and enantioselectivity were investigated. The high yields and high enantioselectivity towards the (S)-enantiomer obtained in the bioreduction of 2-arylpropionic aldehydes, clearly indicate the achievement of a DKR process through a combination of an enzyme-catalyzed kinetic reduction with a chemical base-catalyzed racemization of the unreacted aldehydes. The racemization step is represented by the keto-enol equilibrium of the aldehyde and can be controlled by modulating pH and reaction conditions.
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Lombardo M, Trombini C, Quintavalla A, Chiarucci M. Multiphase Homogeneous Catalysis: Common Procedures and Recent Applications. Synlett 2010. [DOI: 10.1055/s-0030-1258114] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Galletti P, Quintavalla A, Ventrici C, Giannini G, Cabri W, Penco S, Gallo G, Vincenti S, Giacomini D. Azetidinones as zinc-binding groups to design selective HDAC8 inhibitors. ChemMedChem 2010; 4:1991-2001. [PMID: 19821480 DOI: 10.1002/cmdc.200900309] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
2-Azetidinones, commonly known as beta-lactams, are well-known heterocyclic compounds. Herein we described the synthesis and biological evaluation of a series of novel beta-lactams. In vitro inhibition assays against HDAC isoforms showed an interesting isoform-selectivity of these compounds towards HDAC6 and HDAC8. The isoform selectivity changed in response to modification of the azetidinone-ring nitrogen atom substituent. The presence of an N-thiomethyl group is a prerequisite for the activity of these compounds in the micromolar range towards HDAC8.
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Galletti P, Quintavalla A, Ventrici C, Giannini G, Cabri W, Giacomini D. 2-Azetidinones: synthesis of new bis(indolyl)butyl-β-lactams. NEW J CHEM 2010. [DOI: 10.1039/c0nj00463d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Galletti P, Quintavalla A, Ventrici C, Giacomini D. Halodecarboxylation Reaction of 4-Alkylidene-β-lactams. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900558] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Pavanetto M, Zarpellon A, Giacomini D, Galletti P, Quintavalla A, Cainelli G, Folda A, Scutari G, Deana R. Inhibitory effect by new monocyclic 4-alkyliden-beta-lactam compounds on human platelet activation. Platelets 2009; 18:357-64. [PMID: 17654305 DOI: 10.1080/09537100601100796] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In the present study some new beta-lactam compounds were screened for their ability to inhibit human platelet activation. In particular four compounds differing in the group on the nitrogen atom of the azetidinone ring were investigated. A beta-lactam having an ethyl 2-carboxyethanoate N-bound group was demonstrated to inhibit, in the micromolar range, both the Ca(2+) release from endoplasmic reticulum, induced either by thrombin or by the ATPase inhibitor thapsigargin, and the Ca(2+) entry in platelets driven by emptying the endoplasmic reticulum. The compound also inhibited the platelet aggregation induced by a variety of physiological agonists including ADP, collagen, thrombin and thrombin mimetic peptide TRAP. The beta-lactam reduced the phosphorylation of pleckstrin (apparent MW 47 kDa), elicited by thrombin but not by the protein kinase C activator phorbol ester. Accordingly it did not significantly affect the aggregation evoked by phorbol ester or Ca(2+) ionophore. It was concluded that the beta-lactam likely exerts its anti-platelet-activating action by hampering the agonist induced cellular Ca(2+) movements. The beta-lactam concentration, which significantly inhibited platelet activation, only negligibly affected the cellular viability. Even if it is still premature to draw definitive conclusions, the present results suggest that this new compound might constitute a tool of potential clinical interest and the starting-point for the synthesis of new more beneficial anti-thrombotic compounds.
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Adinolfi M, Giacomini D, Iadonisi A, Quintavalla A, Valerio S. Synthesis of the Mannopeptimycin Disaccharide and Its Conjugation with 4-Alkylidene-β-lactams. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701159] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Giacomini D, Galletti P, Quintavalla A, Gucciardo G, Paradisi F. Highly efficient asymmetric reduction of arylpropionic aldehydes by horse liver alcohol dehydrogenase through dynamic kinetic resolution. Chem Commun (Camb) 2007:4038-40. [PMID: 17912408 DOI: 10.1039/b712290j] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enantioselective synthesis of (2S)-2-phenylpropanol and (2S)-2-(4-iso-butylphenyl)propanol ((S)-Ibuprofenol) has been achieved by means of Horse Liver Alcohol Dehydrogenase (HLADH) in buffered aqueous solution or buffered organic solvent mixtures; under the reaction conditions, a dynamic kinetic resolution (DKR) process was realized with good reaction yields and enantiomeric ratios.
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Sgreccia L, Bandini M, Morganti S, Quintavalla A, Umani-Ronchi A, Cozzi PG. Titanium-catalyzed Reformatsky-type reaction. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.02.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cainelli G, Galletti P, Giacomini D, Licciulli S, Quintavalla A. Vinylic Halogenation in 4-Alkylidenazetidin-2-ones. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Broccolo F, Cainelli G, Caltabiano G, Cocuzza CEA, Fortuna CG, Galletti P, Giacomini D, Musumarra G, Musumeci R, Quintavalla A. Design, Synthesis, and Biological Evaluation of 4-Alkyliden-beta Lactams: New Products with Promising Antibiotic Activity Against Resistant Bacteria. J Med Chem 2006; 49:2804-11. [PMID: 16640341 DOI: 10.1021/jm0580510] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The design, synthesis, and antibacterial activity of 4-alkyliden-azetidin-2-ones as new antimicrobial agents against multidrug-resistant pathogens is reported. 4-Alkyliden-azetidin-2-ones were easily obtained using an original protocol starting from 4-acetoxy-azetidinones and diazoesters. Parent compounds were further elaborated to obtain a small library of 4-alkylidene derivatives. A molecular modeling approach using GRID descriptors based on the concept of VRS identified attractive drug candidates and contributed to the rationalization of functional group effects in QSARs. The in vitro antibacterial activity of the new agents was evaluated against 43 recent clinical isolates of antibiotic-susceptible and -resistant Gram-positive and Gram-negative pathogens by determining their minimum inhibitory concentrations (MICs). The most active compound showed MIC values ranging from 0.25 to 32 mg/L against some of the bacterial species tested. Interestingly, some compounds demonstrated similar activity against methicillin-susceptible and -resistant strains of Staphylococcus aureus suggesting possible alternative mechanisms of action of these agents, supported by citotoxicity and preliminary scanning electron microscopy studies.
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Adinolfi M, Galletti P, Giacomini D, Iadonisi A, Quintavalla A, Ravidà A. Toward Novel Glyconjugates: Efficient Synthesis of Glycosylated 4-Alkylidene--lactams. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500665] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cainelli G, Galletti P, Garbisa S, Giacomini D, Sartor L, Quintavalla A. 4-Alkyliden-β-lactams conjugated to polyphenols: Synthesis and inhibitory activity. Bioorg Med Chem 2005; 13:6120-32. [PMID: 16084102 DOI: 10.1016/j.bmc.2005.06.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2005] [Revised: 06/09/2005] [Accepted: 06/13/2005] [Indexed: 10/25/2022]
Abstract
A series of compounds combining the beta-lactam and polyphenol scaffold have been prepared and evaluated for inhibition of human leukocyte elastase and matrix metallo-proteases MMP-2 and MMP-9. The design of these compounds has been based on the 'overlapping-type' strategy where two pharmacophores are linked in a single molecule. The most powerful compound against elastase was an N-galloyl-4-alkyliden beta-lactam, [3-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-1-(3,4,5-tris-benzyloxy-benzoyl)-azetidin-2-ylidene]-acetic acid ethylester, with an IC50 of 0.5 microM; while the most powerful against MMP-2 was a 4-alkyliden beta-lactam arylated on the C-3 hydroxy side chain (3,5-bis-benzyloxy-4-hydroxy-benzoic acid 1-(2-benzyloxycarbonylmethylene-4-oxo-azetidin-3-yl)-ethyl ester) with an IC50 of 4 microM. Of the total 35 compounds tested, high levels of inhibition of elastase and of MMPs were separately exerted by distinct molecules.
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