Antioxidant and related properties of the plant Embelia ribes and embelin are well known. In the present study embelin was condensed with various aromatic substituted primary amines to yield ten new and one reported derivatives along with monomethyl embelin. All these compounds along with embelin were evaluated for in vitro antioxidant activity using 2,2′-azino-bis(3-ethylbenzo-thiazoline-6-sulfonic acid) diammonium salt (ABTS) and 2,2′-diphenyl-1-picryl hydrazyl (DPPH) methods. Two para-substituted embelin derivatives showed potent antioxidant activity. These compounds along with embelin were studied for analgesic and anti-inflammatory activities at 10 and 20 mg/kg doses by standard methods. Potent analgesic activity higher than the standard pentazocine was observed. Embelin and both of its derivatives almost completely abolished the acetic acid induced writhing. p-Sulfonylamine phenylamino derivative showed better anti-inflammatory activity than embelin.
植物Embelia ribes及其成分embelin的抗氧化及相关特性已广为人知。在本研究中,embelin与多种芳香取代的初级胺缩合,合成了十种新衍
生物和一种已报道的衍
生物,以及单甲基embelin。所有这些化合物连同embelin一起,使用2,2′-azino-bis(3-ethylbenzo-thiazoline-6-sulfonic acid) 二
铵盐(
ABTS)和2,2′-diphenyl-1-picryl hydrazyl(
DPPH)方法评估了其体外抗氧化活性。两个对位取代的embelin衍
生物显示出显著的抗氧化活性。这些化合物与embelin一起,以10和20 mg/kg的剂量通过标准方法研究了其镇痛和抗炎活性。观察到其镇痛活性强于标准药物pentazocine。embelin及其两个衍
生物几乎完全消除了
醋酸诱导的扭曲反应。p-磺酰
氨基苯
氨基衍
生物显示出比embelin更好的抗炎活性。