Reactivities of triarylmethyl and diarylmethyl cations with azide ion investigated by laser flash photolysis. Diffusion-controlled reactions
作者:Robert A. McClelland、V. M. Kanagasabapathy、Narinder S. Banait、Steen Steenken
DOI:10.1021/ja00003a040
日期:1991.1
By use of the technique of laser flashphotolysis, rate constants k AZ and k S have been directly measured for the reactions at 20 o C in acetonitrile-water (AN-W) solutions of varying composition of 18 triarylmethyl and 10 diarylmethyl cations with azide and solvent. The cations have k S that depend on substituent and vary from ∼10 1 to ∼10 7 s −1 . For the more stable ions k AZ also varies, increasing
通过使用激光闪光光解技术,已经直接测量了在 20 o C 下在 18 个三芳基甲基和 10 个二芳基甲基阳离子与叠氮化物的不同组成的乙腈-水 (AN-W) 溶液中反应的速率常数 k AZ 和 k S和溶剂。阳离子具有取决于取代基的k S 并且从~10 1 到~10 7 s -1 变化。对于更稳定的离子,k AZ 也发生变化,随着给电子量的减少而增加,并且随着乙腈含量的增加而增加多达10 3 。然而,对于不太稳定的阳离子,速率常数与取代基无关
Compounds, Methods And Devices for Inhibiting Neoproliferative Changes in Blood Vessel Walls
申请人:Koehler Ralf
公开号:US20090048270A1
公开(公告)日:2009-02-19
Methods, compositions and devices for inhibiting neoproliferative changes in blood vessel walls or other anatomical structures. One or more compounds of Formula I or I-A set forth herein are administered systemically and/or locally to human or veterinary patients to deter or prevent unwanted proliferative changes in blood vessels or other anatomical structures. The invention may be used to deter or prevent stenosis or restenosis of arteries following angioplasty and/or stent placement. In one embodiment, there is provided an implantable stent or stent graft from which one or more compounds of the present invention will elute or otherwise be delivered into an affected blood vessel wall.
Non-peptide inhibition of T-lymphocyte activation and therapies related thereto
申请人:Chandy George K.
公开号:US20070293554A1
公开(公告)日:2007-12-20
Compounds, preparations and methods for immunosuppressive treatment of autoimmune disorders, graft rejection and/or graft/host disease. Therapeutically effective amounts of certain substituted triarylmethane compounds, such as 1-[(2-chlorophenyl)diphenylmethyl]-1H-pyrazole, are administered to mammalian patients to selectively inhibit the calcium-activated K
+
channel (IKCa1) in lymphocytes, monocytes, macrophages, platelets or endothelial cells without concomitant inhibition of P450-dependent enzyme systems, resulting in reduction of antigen-, cytokine-, or mitogen-induced calcium entry through store operated calcium channels in these cells, suppression of cytokine production by these cells, and inhibition of activation of these cells. Such inhibition of the Ca
++
activated K
+
channel (IKCa1) prevents the pre-Ca
++
stage of cell activation and thus causes immunosuppression and an anti-inflammatory response.
Organizational Buying and Advertising Agency-Client Relationships in China
作者:Gerard Prendergast、Yizheng Shi、Douglas West
DOI:10.1080/00913367.2001.10673638
日期:2001.6
The 1980s and 1990s have seen the development of an interesting, diverse, and relevant body of literature on the advertising agency-client relationship. In recent times, an area of focus has been the application of organizational buying behavior principles to companies that are purchasing advertising services from advertising agencies. However, little is known about the application of such theories in the context of a developing country. After examining the literature relating to China's advertising industry and the application of organizational buying behavior principles in the advertising industry, this article reports on a survey of 200 firms in Shanghai. The results unexpectedly show that advertising agency power in the campaign development process is not related to the nature of the advertising task (new task, modified rebuy, straight rebuy) at hand. In addition, bottom-up processes give agencies the weakest pourer, and the client buying process is dominated by marketers, the salesforce, and public relations, with top managers the primary deciders.
Triphenylbutanamines: Kinesin Spindle Protein Inhibitors with in Vivo Antitumor Activity
作者:Fang Wang、James A. D. Good、Oliver Rath、Hung Yi Kristal Kaan、Oliver B. Sutcliffe、Simon P. Mackay、Frank Kozielski
DOI:10.1021/jm201195m
日期:2012.2.23
The human mitotic kinesin Eg5 represents a novel mitotic spindle target for cancer chemotherapy. We previously identified S-trityl-L-cysteine (STLC) and related analogues as selective potent inhibitors of Eg5. We herein report on the development of a series of 4,4,4-triphenylbutan-1-amine inhibitors derived from the STLC scaffold. This new generation systematically improves on potency: the most potent C-trityl analogues exhibit K-i(aPP) <= 10 nM and GI(50) approximate to 50 nM, comparable to results from the phase II clinical benchmark ispinesib. Crystallographic studies reveal that they adopt the same overall binding configuration as S-trityl analogues at an allosteric site formed by loop L5 of Eg5. Evaluation of their druglike properties reveals favorable profiles for future development and, in the clinical candidate ispinesib, moderate hERG and CYP inhibition. One triphenylbutanamine analogue and ispinesib possess very good bioavailability (51% and 45%, respectively), with the former showing in vivo antitumor growth activity in nude mice xenograft studies.