Recently, 1,3-diarylalkyl thioureas have merged as one of the promising nonvanilloid TRPV1 antagonists possessing excellent therapeutic potential in pain regulation. In this paper, the full structure-activity relationship for TRPV1 antagonism of a novel series of 1,3-diarylalky thioureas is reported. Exploration of the structure- activity relationship, by systemically modulating three essential pharmacophoric regions, led to six examples of 1,3-dibenzyl thioureas, which exhibit Ca2+ uptake inhibition in rat DRG neuron with IC50 between 10 and 100 nM.
SAR studies of capsazepinoid bronchodilators 3: The thiourea part (coupling region) and the 2-(4-chlorophenyl)ethyl moiety (C-region)
作者:Magnus Berglund、María F. Dalence-Guzmán、Staffan Skogvall、Olov Sterner
DOI:10.1016/j.bmc.2007.11.056
日期:2008.3
Certain derivatives and analogues of capsazepine are potent in vitro inhibitors of bronchoconstriction in human small airways. During an investigation of the dependency of the potency on the structural features of the capsazepinoids in the thiourea moiety (coupling region) and the 2-(4-chlorophenyl)ethyl moiety (Gregion), it was revealed that capsazepinoids with a thiourea or an amide link between the B-ring and the Gregion in general have a good bronchorelaxing activity, while urea is a less attractive choice. Further, it was shown that 1,2,3,4-tetrahydroisoquinolines with a 2-(phenyl)ethyl derivative as the C-region are considerably more potent than those with an octyl group, while 2,3,4,5-tetrahydro-1H-2-benzazepines were found to be more insensitive to the nature of the Gregion. (C) 2007 Elsevier Ltd. All rights reserved.
Analogues of Capsaicin with Agonist Activity as Novel Analgesic Agents: Structure−Activity Studies. 4. Potent, Orally Active Analgesics
作者:Roger Wrigglesworth、Christopher S. J. Walpole、Stuart Bevan、Elizabeth A. Campbell、Andy Dray、Glyn A. Hughes、Iain James、Kay J. Masdin、Janet Winter
DOI:10.1021/jm960512h
日期:1996.1.1
reported modular approach. These in vitro agonist effects were shown to correlate with analgesic potency in rodent models. Combination of optimal structural features from each of these regions of the capsaicin molecule have led to highly potent agonists (eg., 1b). Evaluation in vivo established that 1b had analgesic properties but poor oral activity, short duration of action, and excitatory side effects