A catalyst system comprising 10 mol % (Pd(OAc) and 20 mol % PPh3 effects the cyclisation of aryl halides onto proximate alkenes via 5-, 6-, and 7-exo-trig, and 7-endo-trig processes giving a variety of bridged-ring carbo- and hetero-cycles in excellent yield. Double bond isomerisation in the product is rarley encountered and may be suppressed by the addition of Tl(1) salts. One example of diastereospecific
Benzimidazolyl derivatives, pharmaceutical compositions containing these
申请人:Karl Thomae GmbH
公开号:US05391556A1
公开(公告)日:1995-02-21
The invention relates to benzimidazolyl derivatives of general formula ##STR1## wherein R.sub.1 to R.sub.3 are defined as in claim 1, the mixtures of position isomers thereof and the salts thereof, which have valuable pharmacological properties, particularly the effect of extending the thrombin time, a thrombin inhibiting effect and an inhibiting effect on related serine proteases such as trypsin, pharmaceutical compositions containing this compound and processes for the preparation thereof.
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。
Copper-catalyzed olefin epoxidation by dioxygen or amine N-oxide
The system oxidizes initially tetrahydropyridines 1a, b into the corresponding epoxides 2a, b. Epoxide 2b is also formed by reaction of tetrahydropyridine N-oxide 4b with CuII(OAc)2, providing evidence for active copper-oxygen species as common intermediates in these epoxidizing systems. Subsequent CuII - promoted regioselective opening of epoxides 2a,b is studied.