Analogs of capsaicin with agonist activity as novel analgesic agents; structure-activity studies. 3. The hydrophobic side-chain "C-region"
作者:Christopher S. J. Walpole、Roger Wrigglesworth、Stuart Bevan、Elizabeth A. Campbell、Andy Dray、Iain F. James、Kay J. Masdin、Martin N. Perkins、Janet Winter
DOI:10.1021/jm00068a016
日期:1993.8
Structural variants of the hydrophobic side chain (''C region'') of the capsaicin molecule have been incorporated into a series of vanillylamides and vanillylthioureas. These compounds have been tested in an in vitro assay for agonism (Ca-45(2+) influx into dorsal root ganglia neurones), previously shown to be predictive of analgesic activity. The results of this study have established the requirement for a hydrophobic substituent of limited size (molar refractivity, MR, <55) in order to obtain high potency. Combination of the information gained here about the ''C-region'' of the capsaicin molecule with the studies described in the preceding two papers provides a rational basis for the design of compounds of increased potency.