Tadros, Wadie; Awad, Sami B.; Sakla, Alfy B., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 3, p. 199 - 202
Bisaryl cyclobutenes derivatives as cyclooxygenase inhibitors
申请人:Merck Frosst Canada, Inc.
公开号:US05817700A1
公开(公告)日:1998-10-06
The invention encompasses the novel compound of Formula I useful in the treatment of cyclooxygenase-2 mediated diseases. ##STR1## The invention also encompasses certain pharmaceutical compositions for treatment of cyclooxygenase-2 mediated diseases comprising compounds of Formula I.
Importance of Direct Metal−π Coupling in Electronic Transport Through Conjugated Single-Molecule Junctions
作者:Jeffrey S. Meisner、Seokhoon Ahn、Sriharsha V. Aradhya、Markrete Krikorian、Radha Parameswaran、Michael Steigerwald、Latha Venkataraman、Colin Nuckolls
DOI:10.1021/ja308626m
日期:2012.12.19
We study the effects of molecular structure on the electronic transport and mechanical stability of single-molecule junctions formed with Au point contacts. Two types of linear conjugated molecular wires are compared: those functionalized with methylsulfide or amine aurophilic groups at (1) both or (2) only one of its phenyl termini. Using scanning tunneling and atomic force microscope break-junction
我们研究了分子结构对由 Au 点接触形成的单分子结的电子传输和机械稳定性的影响。比较了两种类型的线性共轭分子线:那些在 (1) 两个或 (2) 只有一个苯基末端用甲基硫化物或胺亲金基团官能化的。使用扫描隧道和原子力显微镜断裂连接技术,研究了单和双功能化分子线的电导及其对连接伸长和断裂力的依赖性。当分子桥通过一端的 S-Au 供体-受体键和另一端相对较弱的 Au-π 相互作用耦合时,可以观察到通过单功能化导线的电荷传输。对于单功能化分子线,可以通过在元位置安装第二个亲金基团来机械稳定连接,然而,这本身不会有助于新的传导途径。这些结果揭示了通过金属-π 相互作用产生的电子耦合与共轭体系上化学取代引入的量子力学效应之间的重要相互作用。这项研究提供了一种通过分子线确定性地调整电气和机械性能的策略。
Electrochemical deoxygenative homo-couplings of aromatic aldehydes
作者:Xiaoqian Zhao、Meng Li、Kunhui Sun、Zhimin Xu、Lifang Tian、Yahui Wang
DOI:10.1039/d3cc03346e
日期:——
An electrochemical deoxygenative homo-coupling of aromatic aldehydes is achieved to selectively access bibenzyl and stilbene derivatives. The protocol allows the homo-coupling of aldehydes to occur after single-electron-reduction at the cathode. Taking advantage of the oxophilicity of triphenylphosphine, the electrochemicaldeoxygenation proceeds smoothly to give reductive homo-coupling products.