Synthesis and Biological Evaluation of CTP Synthetase Inhibitors as Potential Agents for the Treatment of African Trypanosomiasis
作者:Lucia Tamborini、Andrea Pinto、Terry K. Smith、Louise L. Major、Maria C. Iannuzzi、Sandro Cosconati、Luciana Marinelli、Ettore Novellino、Leonardo Lo Presti、Pui E. Wong、Michael P. Barrett、Carlo De Micheli、Paola Conti
DOI:10.1002/cmdc.201200304
日期:2012.9
Acivicin analogues with an increased affinity for CTPsynthetase (CTPS) were designed as potential new trypanocidal agents. The inhibitory activity against CTPS can be improved by increasing molecular complexity, by inserting groups able to establish additional interactions with the binding pocket of the enzyme. This strategy has been pursued with the synthesis of α‐amino‐substituted analogues of Acivicin
Synthesis and Pharmacological Characterization at Glutamate Receptors of the Four Enantiopure Isomers of Tricholomic Acid
作者:Andrea Pinto、Paola Conti、Marco De Amici、Lucia Tamborini、Ulf Madsen、Birgitte Nielsen、Thomas Christesen、Hans Bräuner-Osborne、Carlo De Micheli
DOI:10.1021/jm701394a
日期:2008.4.1
The two enantiomeric pairs of erythro- and threo-amino-(3'-hydroxy-4',5'-dihydro-isoxazol-5'-yl)-acetic acids were synthesized via the 1,3-dipolar cycloaddition of bromonitrile oxide to (R)- or (S)-3-(tert-butoxycarbonyl)2,2-dimethyl-4-vinyloxazolidine. The pharmacological profiles of the studied amino acids reflect the relationship between the activity/selectivity and the stereochemistry of the two stereogenic centers: while the (2S,5'S) stereoisomer is an agonist at the AMPA and KA receptors, its (2R,5'R) enantiomer interacts selectively with the NMDA receptors; the (2S,5'R) stereoisomer is the only one capable to activate the mGluRs.
A novel simplified synthesis of acivicin
作者:Andrea Pinto、Paola Conti、Lucia Tamborini、Carlo De Micheli
DOI:10.1016/j.tetasy.2009.02.010
日期:2009.3
This report describes an efficient synthesis of the natural isomer of acivicin, which is the only one provided with a noteworthy biological activity. The present procedure allowed the synthesis of (+)-1 in just five steps with a 34% overall yield. Due to the easy separation of the two diastereomers and to the availability of the starting material at low cost, the present procedure can be scaled-up to gram quantities. (c) 2009 Elsevier Ltd. All rights reserved.