57850-05-2Relevant articles and documents
Design, synthesis, and electrophysiological evaluation of NS6740 derivatives: Exploration of the structure-activity relationship for alpha7 nicotinic acetylcholine receptor silent activation
Pismataro, Maria Chiara,Horenstein, Nicole A.,Stokes, Clare,Quadri, Marta,De Amici, Marco,Papke, Roger L.,Dallanoce, Clelia
, (2020/08/19)
The α7 nicotinic acetylcholine receptor (nAChR) silent agonists, able to induce receptor desensitization and promote the α7 metabotropic function, are emerging as new promising therapeutic anti-inflammatory agents. Herein, we report the structure–activity
A smooth rearrangement of N-p-toluenesulfonyl 2-tert- butyldiphenylsilylmethyl-substituted azetidines into N-p-toluenesulfonyl 3-tert-butyldiphenylsilyl-substituted pyrrolidines
Narhe, Bharat D.,Sriramurthy, Vardhineedi,Yadav, Veejendra K.
experimental part, p. 4390 - 4399 (2012/07/14)
The rearrangement of N-p-toluenesulfonyl 2-tert-butyldiphenylsilylmethyl- substituted azetidines into 3-tert-butyldiphenylsilyl-substituted pyrrolidines under Lewis acid conditions in dichloromethane involves 1,2-migration of silicon through a siliranium ion. The formation of siliranium ion was discovered not to be in concert with σC-N cleavage from stereochemical analysis of the pyrrolidine products formed from 3- and 4-substituted-2-tert- butyldiphenylsilylmethyl azetidines and also from the optical rotation data and chiral HPLC analysis of the pyrrolidine product formed from N-p-toluenesulfonyl 2(R)-tert-butyldiphenylsilylmethyl azetidine. The formation of sterically less hindered siliranium ion is followed by its SN2 opening by the internal nitrogen nucleophile. Oxidative cleavage of σC-Si bond leads to the formation of 3-hydroxypyrrolidines.
Fluoronaphthyridines and -quinolines as Antibacterial Agents. 5. Synthesis and Antimicrobial Activity of Chiral 1-tert-Butyl-6-fluoro-7-substituted-naphthyridones
Cesare, P. Di,Bouzard, D.,Essiz, M.,Jacquet, J. P.,Ledoussal, B.,et al.
, p. 4205 - 4213 (2007/10/02)
A series of novel 7-substituted-1-tert-butyl-6-fluoronaphthyridone-3-carboxylic acids has been prepared.These derivatives are characterized by chiral aminopyrrolidine substituents at the 7 position.In this paper we report the full details of the asymmetric synthesis of this series of compounds.Structure-activity relationship studies indicate that the absolute stereochemistry at the asymmetric centers of the pyrrolidine ring is critical for maintaining good activity.Compounds 60 and 61 (3-amino-4-methylpyrrolidine enantiomers) were selected for preclinical evaluation.