使用不同的常规合成方法和微波辅助合成方法合成了两个系列的4个取代的N- [1-(吡啶-3-和-4-基)亚乙基]苯胺,并且线性自由能关系已应用于感兴趣的碳原子的13 C NMR化学位移。取代基诱导的化学位移已使用单取代基参数和双取代基参数方法进行了分析。所呈现的相关性描述令人满意地具有用于C1类似的贡献和甲亚胺碳领域,并且谐振取代基的影响,与该碳原子的例外第在两个系列中,C1'原子都发现负ρ值(反向取代基效应)。在MP2 / 6-31G ++(d,p)级别优化几何结构的量子化学计算以及13 C NMR化学位移,可以更好地了解分子构象对电子取代基效应传递的影响。比较不同系列的亚胺与偶氮甲亚胺碳上连接的苯基,4-硝基苯基,2-吡啶基,3-吡啶基,4-吡啶基的相关结果与4-取代的N- [1-(吡啶-3)的结果-和-4-基)亚乙基]苯胺为相同的取代基组(X)表示的取代基X的电子效应的影响和π的组合1单位可以描述为不同共振结构的敏感平衡。
3-Arylcarbonyl-1H-indoles useful as therapeutic agents
申请人:STERLING WINTHROP INC.
公开号:EP0444451A2
公开(公告)日:1991-09-04
2-R₂-R₄-substituted-3-R₃-CO-1-[(C-attached-N-heteryl)-(Alk)n]-1H-indoles useful as analgesic, anti-rheumatic, anti-inflammatory or anti-glaucoma agents.
Complexes of pyridyldiimines with vanadium and other transition metals, and their use as olefin oligomerization and polymerization catalysts
申请人:Phillips Petroleum Company
公开号:US20030144438A1
公开(公告)日:2003-07-31
Pyridyldiimine ligands having one of the following structures:
1
and pyridyldiimine metal complexes having one of the following structures:
2
for example the Group 4b, 5b, 6b, 7b, and 8 transition metal (M) complexes such as vanadium complexes, are disclosed. The invention also relates to the use of these metal complexes as olefin polymerization or oligomerization catalysts, optionally in combination with metal alumoxane and similar catalyst activators. Certain of these catalysts have been found to possess robust activity as selective oligomerization catalysts, while others of these catalysts act selectively as polymerization catalysts. A method of synthesizing the above-noted ligands using p-toluenesulfonic acid as a catalyst is also disclosed.
Novel diacid accelerated borane reducing agent for imines
作者:Zhi-Hui Lu、Nandkumar Bhongle、Xiping Su、Seth Ribe、Chris H Senanayake
DOI:10.1016/s0040-4039(02)01905-6
日期:2002.11
A remarkable effect of diacids in modulating the reactivity of borane has been discovered. This novel process provides a rapid and excellent access for reduction of a variety of imines with different functionalities. (C) 2002 Elsevier Science Ltd. All rights reserved.
THOMPSON, CHARLES M.;DOCTER, STEPHEN, TETRAHEDRON LETT., 29,(1988) N 41, C. 5213-5216