Imidazoline derivatives as alpha-1A adrenoceptor ligands
申请人:Bigham Eric Cleveland
公开号:US06884801B1
公开(公告)日:2005-04-26
Compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof are disclosed. Such compounds are useful in the treatment of Alpha-1A mediated diseases or conditions such as urinary incontinence.
Pb(OAc)4(CH3)3SiN3 reacts with simple nucleophilic olefins to form mostly diazides and azide-acetoxy compounds,2 while with steroidal olefines α-azidosteroidketones3 are afforded. Contrary to this result the title reagent reacts not only with nucleophilic but also with electrophilic double-bounds yielding α-azido-carbonyl compounds. Not any azide-acetoxy compound is formed. Compound 14 indicates that
Rhazinilam a structurally relatively simple tetracyclic natural product exerts interesting anticancer activities in vitro, which are difficult to reproduce in vivo. Based on the findings accumulated during the synthetic efforts and on the known metabolic sensitivity towards oxidation and acids a modified structural analogue of rhazinilam is proposed. A novel convergent approach towards the heterocyclic
vinyl arenes with trimethylsilylazide and molecular oxygen as stoichiometric oxidant was achieved. In contrast to photocatalysts based on iridium, ruthenium, or organic dyes, [Cu(dap)2]Cl or [Cu(dap)Cl2] were found to be unique for this transformation, which is attributed to their ability to interact with the substrates through ligand exchange and rebound mechanisms. CuII is proposed as the catalytically
用三甲基甲硅烷基叠氮化物和分子氧作为化学计量氧化剂实现了乙烯基芳烃的可见光加速氧化叠氮化。与基于铱,钌或有机染料的光催化剂相反,发现[Cu(dap)2 ] Cl或[Cu(dap)Cl 2 ]对于这种转化是独特的,这归因于它们与金属,金属或金属的相互作用。底物通过配体交换和反弹机制。有人建议将铜II作为催化活性物质,将其与叠氮化物配位后将进行光加速均质分解,从而形成铜I和叠氮化物自由基。这种激活原则(CU II -X→铜我+ X 。)开启了铜基光催化的新途径。
One-pot synthesis of α-bromo- and α-azidoketones from olefins by catalytic oxidation with in situ-generated modified IBX as the key reaction
α-azidoketones starting from olefins have been developed by employing catalytic oxidation of the intermediary bromohydrins with in situ-generated modified IBX as the key reaction. The improved procedure involves initial formation of bromohydrin by the reaction of olefin with NBS in acetonitrile-water mixture (1:1) at rt followed by oxidation with in situ-generated 3,4,5,6-tetramethyl-2-iodoxybenzoic acid (TetMe-IBX)