Synthesis and Anticonvulsant Activity of 3-(6-Substituted-benzothiazol-2-yl)-6-phenyl-[1, 3]-xazinane-2-thiones
摘要:
A new series of 3-(6-substituted-benzothiazol-2-yl)-6-phenyl-[1,3]-oxazinane-2-thiones (4 a-j) has been synthesised using an appropriate synthetic route (Scheme 1) and characterised by elemental analyses and spectral (IR, H-1 NMR, C-13 NMR, and El MS) data. The anticonvulsant activity of all the title compounds (4 a-j) was evaluated against Maximal Electroshock (MES) induced seizures and furthermore the most potent compounds were evaluated against subcutaneous pentylene-in mice. The neurotoxicity was assessed tetrazole (sc PTZ) induced seizures model, using the rotorod procedure. All the test compounds were administered intraperitoneally at various dose levels ranging from 30-200 mg/kg body wt and the median effective dose (ED50), median toxic dose (TD50), and protection index (PI) values were determined (Table 2). Among the compounds tested, the 3-(6-dimethylaminobenzothiazol-2-yl)-6-phenyl-[1,3]-oxazinane-2-thiones (4j) was found to be the most potent (ED50: 9.85 and 14.8 in MES model and 12 and 17 in scPTZ model at t = 0.5 h and 4 h, respectively, and TD50 42.8 and 44 at t = 0.5 h and 4 h, respectively, which has been found to be significant at p < 0.01 with respect to reference standard phenytoin) with protection index (PI) 4.85.
Discovery of benzothiazole amides as potent antimycobacterial agents
作者:James Graham、Christina E. Wong、Joshua Day、Elizabeth McFaddin、Urs Ochsner、Teresa Hoang、Casey L. Young、Wendy Ribble、Mary A. DeGroote、Thale Jarvis、Xicheng Sun
DOI:10.1016/j.bmcl.2018.08.026
日期:2018.10
against nontuberculous mycobacteria and Mycobacterium tuberculosis, numerous hits were identified with moderate activity. Extensive medicinal chemistry optimization has led to a series of potent benzothiazole amide antimycobacterial agents. Replacement of the adamantylgroup with cyclohexyl derivatives and further development of this series resulted in an advanced lead compound, CRS400393, which demonstrated
通过对市售非结核分枝杆菌和结核分枝杆菌文库的高通量筛选,鉴定出许多具有中等活性的命中。广泛的药物化学优化产生了一系列有效的苯并噻唑酰胺抗分枝杆菌药物。用环己基衍生物取代金刚烷基,并进一步开发该系列,产生了先进的先导化合物CRS400393 ,它表现出优异的效力和分枝杆菌特异性的活性谱。针对脓肿分枝杆菌和其他快速生长 NTM 的 MIC 值范围为 0.03 至 0.12 μg/mL,针对鸟分枝杆菌复合体的 MIC 值范围为 1-2 μg/mL。初步作用机制研究表明这些药物可能以 MmpL3(一种分枝杆菌分枝菌酸转运蛋白)为目标。该系列已在脓肿分枝杆菌感染的概念验证小鼠模型中证明了体内功效。
A new series of 3-(6-substituted-benzothiazol-2-yl)-6-phenyl-[1,3]-oxazinane-2-thiones (4 a-j) has been synthesised using an appropriate synthetic route (Scheme 1) and characterised by elemental analyses and spectral (IR, H-1 NMR, C-13 NMR, and El MS) data. The anticonvulsant activity of all the title compounds (4 a-j) was evaluated against Maximal Electroshock (MES) induced seizures and furthermore the most potent compounds were evaluated against subcutaneous pentylene-in mice. The neurotoxicity was assessed tetrazole (sc PTZ) induced seizures model, using the rotorod procedure. All the test compounds were administered intraperitoneally at various dose levels ranging from 30-200 mg/kg body wt and the median effective dose (ED50), median toxic dose (TD50), and protection index (PI) values were determined (Table 2). Among the compounds tested, the 3-(6-dimethylaminobenzothiazol-2-yl)-6-phenyl-[1,3]-oxazinane-2-thiones (4j) was found to be the most potent (ED50: 9.85 and 14.8 in MES model and 12 and 17 in scPTZ model at t = 0.5 h and 4 h, respectively, and TD50 42.8 and 44 at t = 0.5 h and 4 h, respectively, which has been found to be significant at p < 0.01 with respect to reference standard phenytoin) with protection index (PI) 4.85.
Development of submicromolar 17β-HSD10 inhibitors and their in vitro and in vivo evaluation