Versatile Methods for the Synthesis of 2-Amino-6-trifluoromethoxy-(nitro)benzothiazoles
摘要:
Convenient and regioselective syntheses of all three isomers of mononitro-6-trifluoromethoxy-benzothiazoles, starting from 2-amino-6-trifluoromethoxy-benzothiazole (riluzole) are described.
Process for the preparation of 2-amino-4-nitrobenzothiazole derivatives
申请人:Rhone-Poulenc Rorer S.A.
公开号:US05424439A1
公开(公告)日:1995-06-13
This invention relates to the process for the preparation of a method for preparing derivatives of formula (I), ##STR1## wherein R is an alkyl, alkoxy, alkylthio, polyfluoroalkyl, polyfluoroalkoxy, alkenyl, phenyl, alkylsulphonyl, alkoxycarbonyl, amino, cyano, sulphonamide or dialkylcarbamyl radical, characterized in that a derivative of formula (II), ##STR2## wherein R has the same meaning as in formula (I), is reacted with nitronium tetrafluoroborate and derivatives of formula (II).
Identification of novel 1,2,3,6-tetrahydropyridyl-substituted benzo[ d ]thiazoles: Lead generation and optimization toward potent and orally active EP 1 receptor antagonists
described the design, synthesis and evaluation of a novel series of benzo[d]thiazole derivatives toward an orally active EP1 antagonist. Lead generation studies provided benzo[d]thiazole core from the four designedscaffolds. Optimization of this scaffold in terms of EP1 antagonist potency and ligand-lipophilicity efficiency (LLE; pIC50-clogP) led to a 1,2,3,6-tetrahydropyridyl-substituted benzo[d]thiazole
在这里,我们描述了针对口服活性EP1拮抗剂的一系列新的苯并[d]噻唑衍生物的设计,合成和评估。铅生成研究从四个设计的支架中提供了苯并[d]噻唑核心。根据EP1拮抗剂效能和配体亲脂性效率(LLE; pIC50-clogP)对该支架进行优化,可得到1,2,3,6-四氢吡啶基取代的苯并[d]噻唑衍生物7r(IC50 1.1nM; LLE 4.7),当在17-苯基trinor-PGE2(17-PTP)诱导的大鼠膀胱过度活动症模型中十二指肠内给药时显示出良好的药理作用。