Three new morphine-based compounds bearing arginyl moieties, compounds 7, 9a, and 9b, have been synthesized using solid phase and solution phase techniques with the aim of obtaining new transdermal analgesics. Preliminary biological assays have shown that these compounds have a relatively high affinity for opioid receptors, achieving ≥94 % inhibition of radioligand binding at a concentration of 10 µM in non-selective opioid binding assays. Further testing on two of the analogues, 9a and 9b, demonstrated that these compounds were acting as agonists, rather than antagonists, at the opioid receptors and 9b achieved the significant result of 73 % inhibition of contractile responses in the electrically stimulated guinea pig ileum assay at a concentration of 30 µM. Unfortunately, none of the molecules showed evidence of transdermal activity.
为了获得新型透皮镇痛剂,我们采用固相和溶相技术合成了三种含有精
氨酰分子的
吗啡基化合物,即化合物 7、9a 和 9b。初步
生物试验表明,这些化合物对阿片受体具有较高的亲和力,在非选择性阿片结合试验中,浓度为 10 µM 时对放射性
配体结合的抑制率≥94%。对 9a 和 9b 这两种类似物的进一步测试表明,这些化合物在阿片受体上起着激动剂而非拮抗剂的作用,其中 9b 在电刺激豚鼠回肠试验中,浓度为 30 µM 时对收缩反应的抑制率达到 73%,取得了显著效果。遗憾的是,没有一种分子显示出透皮活性。