Synthesis and Pharmacological Activities of Novel Bicyclic Thiazoline Derivatives as Hepatoprotective Agents. II. (7-Alkoxycarbonyl-2,3,5,6-tetrahydropyrrolo(2,1-b)thiazol-3-ylidene)acetamide Derivatives.
作者:Masashi HASEGAWA、Atsushi NAKAYAMA、Shuichi YOKOHAMA、Toru HOSOKAMI、Yoichi KUREBAYASHI、Takuya IKEDA、Yoshimasa SHIMOTO、Shoichiro IDE、Yuko HONDA、Norio SUZUKI
DOI:10.1248/cpb.43.1125
日期:——
A series of exomethylenic bicyclic thiazoline derivatives (3a-i) was synthesized and evaluated for hepatoprotective activity against galactosamine-induced and monoclonal antibody-induced acute liver injuries in rats. The structure-activity relationships were investigated. Among the compounds synthesized, N-methyl-(7-isopropoxycarbonyl-6, 6-dimethyl-2, 3, 5, 6-tetrahydropyrrolo[2, 1-b]thiazol-3-ylidene)acetamide (3i) exhibited the most potent hepatoprotective activity. This compound suppressed galactosamine-induced hepatic injury at 100 mg/kg by oral administration and further prevented monoclonal antibody-induced hepatic injury at 30 mg/kg by intraperitoneal injection, as judged from the changes in serum transaminase activities.
合成了一系列外甲基双环噻唑啉衍生物(3a-i),并评估了它们对半乳糖胺诱导的大鼠急性肝损伤和单克隆抗体诱导的大鼠急性肝损伤的保肝活性。研究了结构-活性关系。在合成的化合物中,N-甲基-(7-异丙氧羰基-6, 6-二甲基-2, 3, 5, 6-四氢吡咯并[2, 1-b]噻唑-3-亚基)乙酰胺(3i)表现出最强的保肝活性。根据血清转氨酶活性的变化,口服 100 毫克/千克该化合物可抑制半乳糖胺诱导的肝损伤,腹腔注射 30 毫克/千克可进一步防止单克隆抗体诱导的肝损伤。