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Faggi C, García-Valverde M, Marcaccini S, Menchi G. Isolation of Ugi Four-Component Condensation Primary Adducts: A Straightforward Route to Isocoumarins. Org Lett 2010; 12:788-91. [DOI: 10.1021/ol9028622] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lalli C, Trabocchi A, Sladojevich F, Menchi G, Guarna A. Diversity-Oriented Synthesis of Morpholine-Containing Molecular Scaffolds. Chemistry 2009; 15:7871-7875. [DOI: 10.1002/chem.200900744] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Altamura M, Dragoni E, Infantino AS, Legnani L, Ludbrook SB, Menchi G, Toma L, Nativi C. Cyclic glycopeptidomimetics through a versatile sugar-based scaffold. Bioorg Med Chem Lett 2009; 19:3841-4. [DOI: 10.1016/j.bmcl.2009.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Revised: 03/31/2009] [Accepted: 04/03/2009] [Indexed: 11/25/2022]
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Cini N, Trabocchi A, Menchi G, Bottoncetti A, Raspanti S, Pupi A, Guarna A. Morpholine-based RGD-cyclopentapeptides as αvβ3/αvβ5 integrin ligands: Role of configuration towards receptor binding affinity. Bioorg Med Chem 2009; 17:1542-9. [DOI: 10.1016/j.bmc.2009.01.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 01/05/2009] [Accepted: 01/07/2009] [Indexed: 10/21/2022]
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Zanardi F, Burreddu P, Rassu G, Auzzas L, Battistini L, Curti C, Sartori A, Nicastro G, Menchi G, Cini N, Bottoncetti A, Raspanti S, Casiraghi G. Discovery of Subnanomolar Arginine-Glycine-Aspartate-Based α Vβ 3/α Vβ 5 Integrin Binders Embedding 4-Aminoproline Residues. J Med Chem 2008. [DOI: 10.1021/jm800298q] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Faggi C, Neo AG, Marcaccini S, Menchi G, Revuelta J. Ugi four-component condensation with two cleavable components: the easiest synthesis of 2,N-diarylglycines. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.01.134] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zanardi F, Burreddu P, Rassu G, Auzzas L, Battistini L, Curti C, Sartori A, Nicastro G, Menchi G, Cini N, Bottonocetti A, Raspanti S, Casiraghi G. Discovery of Subnanomolar Arginine-Glycine-Aspartate-Based αVβ3/αVβ5 Integrin Binders Embedding 4-Aminoproline Residues. J Med Chem 2008; 51:1771-82. [DOI: 10.1021/jm701214z] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Marcos CF, Marcaccini S, Menchi G, Pepino R, Torroba T. Studies on isocyanides: synthesis of tetrazolyl-isoindolinones via tandem Ugi four-component condensation/intramolecular amidation. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.10.154] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Guarna A, Lalli C, Trabocchi A, Menchi G. LiNTf2-Catalyzed Aminolysis of Lactones with Stoichiometric Quantities of Amines. Synlett 2008. [DOI: 10.1055/s-2007-1000882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Danieli E, Trabocchi A, Menchi G, Guarna A. Synthesis and Conformational Analysis of Constrained β-Turn Mimetics Incorporating a Bicyclic Turn Inducer by Use of the Petasis Three-Component Reaction on Solid Phase. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600650] [Citation(s) in RCA: 12] [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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36
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Cini N, Danieli E, Menchi G, Trabocchi A, Bottoncetti A, Raspanti S, Pupi A, Guarna A. 3-Aza-6,8-dioxabicyclo[3.2.1]octanes as new enantiopure heteroatom-rich tropane-like ligands of human dopamine transporter. Bioorg Med Chem 2006; 14:5110-20. [PMID: 16678430 DOI: 10.1016/j.bmc.2006.04.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2006] [Revised: 04/03/2006] [Accepted: 04/04/2006] [Indexed: 11/19/2022]
Abstract
CNS diseases such as Parkinson, schizophrenia, and attention deficit hyperactivity disorder (ADHD) are characterized by a significant alteration of dopamine transporter (DAT) density. Thus, the development of compounds that are able to selectively interact with DAT is of great interest. Herein we describe the design and synthesis of a new set of 3-aza-6,8-dioxabicyclo[3.2.1]octanes having a tropane-like structure with additional heteroatoms at positions 3 and 6. The compounds were evaluated for their in vitro receptor binding properties toward human dopamine (hDAT) and serotonin (hSERT) transporters using [3H]WIN35,428 and [3H]citalopram as specific radioligands, respectively. Biological assays revealed that some compounds having the N-3 atom substituted with aryl groups possess significant affinity and selectivity for monoamine transporters, and in particular, compound 5d displayed an IC50 of 21 nM toward DAT, and a good selectivity toward SERT (IC50=1042 nM). These results suggest that 3-aryl-3-aza-6,8-dioxabicyclo[3.2.1]octanes may represent a new class of DAT ligands.
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Guarna A, Trabocchi A, Menchi G, Guarna F, Machetti F, Scarpi D. Design, Synthesis, and Applications of 3-Aza-6,8-Dioxabicyclo[3.2.1]Octane-Based Scaffolds for Peptidomimetic Chemistry. Synlett 2006. [DOI: 10.1055/s-2006-926249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Trabocchi A, Rolla M, Menchi G, Guarna A. Synthesis of a constrained tricyclic scaffold based on trans-4-hydroxy-l-proline. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.09.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Danieli E, Trabocchi A, Menchi G, Guarna A. Synthesis of Glycidol- and Sugar-Derived Bicyclic β- and γ/δ-Amino Acids for Peptidomimetic Design. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500386] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Ferrali A, Menchi G, Occhiato EG, Danza G, Mancina R, Serio M, Guarna A. Synthesis and activity of 8-substituted benzo[c]quinolizin-3-ones as dual inhibitors of human 5alpha-reductases 1 and 2. Bioorg Med Chem Lett 2005; 15:145-8. [PMID: 15582428 DOI: 10.1016/j.bmcl.2004.10.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Revised: 10/05/2004] [Accepted: 10/07/2004] [Indexed: 10/26/2022]
Abstract
Some potent dual inhibitors of 5alpha-reductases 1 and 2, based on the benzo[c]quinolizin-3-one structure and with IC(50) values ranging between 93 and 166nM for both isozymes, were found. The presence of the F atom on the ester moiety at the position 8 was crucial. This result can help in the design of other potent, dual inhibitors to be developed as drugs in the treatment of 5alpha-reductase related diseases.
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Occhiato EG, Ferrali A, Menchi G, Guarna A, Danza G, Comerci A, Mancina R, Serio M, Garotta G, Cavalli A, De Vivo M, Recanatini M. Synthesis, Biological Activity, and Three-Dimensional Quantitative Structure−Activity Relationship Model for a Series of Benzo[c]quinolizin-3-ones, Nonsteroidal Inhibitors of Human Steroid 5α-Reductase 1. J Med Chem 2004; 47:3546-60. [PMID: 15214782 DOI: 10.1021/jm031131o] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New 5alpha-reductase 1 (5alphaR-1) inhibitors were designed to complete a consistent set of analogues suitable for a 3D QSAR study. These compounds were synthesized by a modification of the aza-Robinson annulation, further functionalized by Pd-catalyzed cross-coupling processes, and were tested with human 5alphaR-1 expressed in Chinese hamster ovary 1827 cells. It turned out that the potency of the resulting inhibitors was strongly dependent on the type of substitution at the 8 position, with the IC(50) values ranging from 8.1 to 1050 nM. The construction of this homogeneous set of molecules allowed a 3D QSAR study. In particular, comparative molecular field analysis (CoMFA) was used to correlate the potency of the inhibitors with their physicochemical features. Highly accurate evaluations of the atomic point charges were carried out by means of quantum chemical calculations at the DFT/B3LYP level of theory followed by the RESP fitting procedure. It turned out that increasing the reliability of electrostatic parameters greatly affected the statistical results of the QSAR analysis. The 3D QSAR model proposed could be very useful in the further development of 5alphaR-1 inhibitors, which are suitable candidates to be evaluated as drugs in the treatment of 5alphaR-1 related diseases such as acne and alopecia in men and hirsutism in women.
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Trabocchi A, Menchi G, Rolla M, Machetti F, Bucelli I, Guarna A. Enantiospecific synthesis of 3-aza-6,8-dioxa-bicyclo[3.2.1]octane carboxylic acids from erythrose. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00773-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Guarna A, Bucelli I, Machetti F, Menchi G, Occhiato EG, Scarpi D, Trabocchi A. Synthesis of a new enantiopure bicyclic γ/δ-amino acid (BTKa) derived from tartaric acid and α-amino acetophenone. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)01297-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cini N, Machetti F, Menchi G, Occhiato E, Guarna A. Bicyclic Compounds Derived from Tartaric Acid and α-Amino Acids (BTAas): Synthesis of New Molecular Scaffolds Derived from the Combination of (R,R)-Tartaric Acid andL-Serine. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200203)2002:5<873::aid-ejoc873>3.0.co;2-v] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Guarna A, Menchi G, Berti G, Cini N, Bottoncetti A, Raspanti S, Politi A, Pupi A. Synthesis and preliminary biological characterization of a new potential (125)I-radioligand for dopamine and serotonin receptors. Bioorg Med Chem 2001; 9:3197-206. [PMID: 11711295 DOI: 10.1016/s0968-0896(01)00229-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The synthesis and a preliminary biological characterization of a new class of N-benzyl-aminoalcohols which have serotonin (5-HT(2)) and dopamine (D(2)) receptor affinity is described. In vitro competition binding studies were conducted with the new molecules and (3)H-spiperone on crude membrane preparation from rat striatum and frontal cortex. One of these compounds, 3-benzylamino-1-(4-fluoro-2-iodophenyl)-propan-1-ol (6f), whose IC(50) values are in the micromolar range for both the D(2) and 5-HT(2) receptors, was prepared in iodine-125 labelled form (6i) by nucleophilic substitution of the bromine atom of 3-benzylamino-1-(2-bromo-4-fluorophenyl)-propan-1-ol (6d). In the in vivo studies, conducted on rats, the radiolabelled molecule 6i shows a good capacity to cross the blood-brain barrier (BBB) with a mean value of first pass cerebral extraction (E) of ca. 50% when the regional cerebral blood flow, measured with microsphere technique, is in the experimental animal's physiologic range (0.8-1 mL/min/g). A preliminary in vitro autoradiographic distribution on coronal rat brain slices of the radioiodinated molecule showed that it was preferentially localized in the striatum and in the cerebral regions rich in dopamine- and serotonin receptors, even if a high non-specific binding was observed.
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Menchi G, Scrivanti A, Matteoli U. Improvements in the synthesis of terminal alkynes via coupling of arylbromides with 2-methylbut-3-yn-2-ol. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1169(99)00289-7] [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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Trabocchi A, Mancini F, Menchi G, Guarna A. A solid-phase approach towards the development of 3-aza-6,8-dioxabicyclo[3.2.1]octane scaffolds. Mol Divers 2000; 6:245-50. [PMID: 15068088 DOI: 10.1023/b:modi.0000006781.31594.c2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The development of new strategies for solid-phase synthesis of 3-aza-6,8-dioxabicyclo[3.2.1]octane scaffolds, named BTKa, is described. The preparation was made possible by the combination of three components: amines, alpha-halo-acetophenones, and sugar or tartaric acid derivatives. By anchoring each of the three components it was possible to synthesize BTKa compounds either as amino alcohols or amido esters. The compatibility of the protocols with different classes of amines and substituted alpha-halo-acetophenones was demonstrated.
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Guarna A, Guidi A, Machetti F, Menchi G, Occhiato EG, Scarpi D, Sisi S, Trabocchi A. Synthesis and Reactivity of Bicycles Derived from Tartaric Acid and α-Amino Acids: A Novel Class of Conformationally Constrained Dipeptide Isosteres Based upon Enantiopure 3-Aza-6,8-dioxabicyclo[3.2.1]octane-7-carboxylic Acid. J Org Chem 1999. [DOI: 10.1021/jo9904967] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Matteoli U, Beghetto V, Schiavon C, Scrivanti A, Menchi G. Synthesis of the chiral diphosphine ligand 2,3-bis(diphenylphosphino)butane (CHIRAPHOS). ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0957-4166(97)00132-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Guidi A, Guarna A, Giolitti A, Macherelli M, Menchi G. Condensation Product between (R,R)-Tartaric Acid and a L-Phenylalanine Derivative as a New Molecular Scaffold. Arch Pharm (Weinheim) 1997. [DOI: 10.1002/ardp.19973300702] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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