@ A series of novel N-pyridinyl- and pyrinidinyl sulfonamides are useful as fungicides and herbicides. These compounds are particularly useful for the protection of plants from phytopathogens.
A new facile method for preparation of heterocyclic α-iminonitriles and α-oxoacetic acid from heterocyclic aldehydes, p-aminophenol, and sodium cyanide
作者:Branko S. Jursic、Frederic Douelle、Katherine Bowdy、Edwin D. Stevens
DOI:10.1016/s0040-4039(02)00799-2
日期:2002.7
and high yield procedures for the transformation of heterocyclic aldehydes into heterocyclic methylidene-p-hydroxyanilines, heterocyclic α-iminonitriles, and finally into heterocyclic α-oxoacetic acids were described. Considering that many of these compounds have biological activity, the synthetic methodology was optimized using readily available, inexpensive starting materials, and the purification
Synthesis, Phase Behavior and Computational Simulations of a Pyridyl-Based Liquid Crystal System
作者:Fowzia S. Alamro、Hoda A. Ahmed、Saheed A. Popoola、Asmaa Aboelnaga
DOI:10.3390/molecules26216416
日期:——
Schiff base/ester linkages were prepared and investigated via experimental and theoretical techniques. Terminal flexible groups of different chain lengths were connected to the end of phenylbenzoate unit while the other end of molecules was attached to the heterocyclic pyridine moiety. The molecular structures of the designed molecules were evaluated by FT-IR, NMR spectroscopic analyses, whereas their mesomorphic
通过实验和理论技术制备并研究了一组带有希夫碱/酯键的同源液晶材料( Tn )。不同链长的末端柔性基团连接到苯甲酸苯酯单元的末端,而分子的另一端连接到杂环吡啶部分。通过 FT-IR、NMR 光谱分析评估了设计分子的分子结构,并通过偏光光学显微镜 (POM) 和差示扫描量热法 (DSC) 研究了它们的介晶性质。除了具有最短和最长末端柔性链( n = 6 和 16)的成员是单态的之外,它们都表现出二态性。进一步发现T16衍生物具有纯近晶 A (SmA) 中间相,而其他衍生物的长度则被向列 (N) 相覆盖。此外,使用 DFT 方法对偶氮甲碱衍生物进行了计算评估。预计所研究的导数的极性对系统的大小相当敏感。此外,Frontier 分子轨道分析揭示了电子云在 HOMO 和 LUMO 能级的各种分布。