Piperazines as nootropic agents: New derivatives of the potent cognition-enhancer DM235 carrying hydrophilic substituents
作者:Maria Vittoria Martino、Luca Guandalini、Lorenzo Di Cesare Mannelli、Marta Menicatti、Gianluca Bartolucci、Silvia Dei、Dina Manetti、Elisabetta Teodori、Carla Ghelardini、Maria Novella Romanelli
DOI:10.1016/j.bmc.2017.02.019
日期:2017.3
The piperazine ring of the potent nootropic drug DM235 has been decorated with H-bond donor and acceptor groups (CH2OH, CH2OMe, CH2OCOMe, COOEt); the aim was to insert new functional groups, suitable for further chemical manipulation. The influence of these modifications on nootropic activity was assessed by means of the mouse passive avoidance test; some of the newly synthesized molecules (alcohol
Novel enantiomerically pure 2-piperazinemethanols (3-5) were synthesized from 2-piperazinecarboxylic acid 1. The asymmetric reduction of aromatic ketones, ketimine and oxime ether has been performed with reagents prepared from 2-piprazinemethanol and borane to yield enantiomerically enriched alcohols and amines, respectively. The preferred absolute configuration of the product was dependent on the structure of the sulfonyl substituent in the chiral ligand. (C) 1999 Elsevier Science Ltd. All rights reserved.