Synthesis and Pharmacological Activities of Novel Bicyclic Thiazoline Derivatives as Hepatoprotective Agents. I. 8-Ethoxycarbonyl-5,6-dihydrothiazolo(2,3-c)(1,4)thiazine Derivatives.
作者:Masashi HASEGAWA、Atsushi NAKAYAMA、Toru HOSOKAMI、Yoichi KUREBAYASHI、Takuya IKEDA、Yoshimasa SHIMOTO、Shoichiro IDE、Yuko HONDA、Norio SUZUKI
DOI:10.1248/cpb.43.78
日期:——
A series of bicyclic thiazoline derivatives (4a-s) 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, ethyl 3-(N-methylcarbamoyl)-5, 6-dihydrothiazolo[2, 3-c][1, 4]thiazine-8-carboxylate (4p) exhibited remarkable hepatoprotective activity and lower toxicity. This compound suppressed galactosamine-induced hepatic injury at 100 mg/kg by gavage and further prevented monoclonal antibody-induced hepatic injury at 30 mg/kg by intraperitoneal injection, as evaluated by measuring changes in serum transaminase activities.
一系列双环噻唑啉衍生物(4a-s)被合成并评估了其对大鼠由半乳糖胺和单克隆抗体引起的急性肝损伤的肝保护活性。研究了结构-活性关系。在合成的化合物中,乙基3-(N-甲基氨甲酰基)-5,6-二氢噻唑并[2,3-c][1,4]噻嗪-8-羧酸酯(4p)显示出显著的肝保护活性和较低的毒性。该化合物通过口服给药100 mg/kg抑制了半乳糖胺引起的肝损伤,并通过腹腔注射30 mg/kg进一步预防了单克隆抗体引起的肝损伤,这一评估是通过检测血清转氨酶活性的变化来完成的。