techniques in this study. Prodrug candidates were studied on reduction potentials with Ssap-NtrB by HPLC system. Also, cyototoxic properties and prodrug ability of these amides were investigated using different cancer cell lines such as Hep3B and PC3. As a result of theoretical and biological studies, combinations of A5, A6 and A20 with Ssap-NtrB can be suggested as potentialprodrugs/enzyme combinations
Mass spectrometer as a probe in the synthesis of 2-substituted benzimidazoles
作者:Devalla V. Ramana、Ethirajulu Kantharaj
DOI:10.1016/s0040-4020(01)86965-9
日期:1994.2
formation of 2-substitutedbenzimidazoles. This new synthetic approach towards the synthesis of 2-substitutedbenzimidazoles is developed based on the electron impact studies of N,N'-diacyl-1,2-benzenediamines under 70 eV conditions, in which important fragment ions corresponding to 2-substitutedbenzimidazoles are observed. The mechanisms and ion-structures, proposed in the mass spectral study, are supported
Homochiral metal–organic macrocyclic complexes are of great significance owing to their chirality and well-defined internalcavities that potentially have the ability to mimic complicated biological processes. Here we report a novel metal/anion-coordination co-driven strategy for the formation of nanoscale supramolecular metallocycles with unique topology, large size, and desired chirality. The enantiomeric
同手性金属有机大环配合物由于其手性和明确的内腔而具有重要意义,可能具有模拟复杂生物过程的能力。在这里,我们报告了一种新颖的金属/阴离子配位共同驱动策略,用于形成具有独特拓扑、大尺寸和所需手性的纳米级超分子金属环。对映体Janus型金属环带是基于硫酸根阴离子和Co II离子与结合邻亚苯基-(双)脲阴离子螯合位点和8-羟基喹啉金属配位位点的双功能非手性配体的协同配位而组装的。固有的手性源自两种类型的螺旋手性(三重扭曲莫比乌斯环和圆形螺旋),这是首次在金属有机复合体系中观察到。值得注意的是,通过聚集结晶成一对对映体(P-或M - Co 9)实现了自发手性拆分,这归因于多种弱分子间相互作用促进了分级螺旋超结构。
Walther; v. Pulawski, Journal fur praktische Chemie (Leipzig 1954), 1899, vol. <2> 59, p. 261