Propylsulfonic acid functionalized nanozeolite clinoptilolite as heterogeneous catalyst for the synthesis of quinoxaline derivatives
作者:Seyed Meysam Baghbanian
DOI:10.1016/j.cclet.2015.04.037
日期:2015.9
clinoptilolite (Nano CP) was successfully functionalized by propylsulfonic acid and applied as efficientheterogeneouscatalyst for the synthesis of quinoxaline derivatives in aqueous media. The nanocatalyst was characterized by various techniques such as CHN, XRD, FT-IR, BET, TGA/DTA, SEM, TEM and TEM-EDS. The results show its applicability as green, reusable and promising catalyst in organic synthesis. It was
Mechanochemical Synthesis, Photophysical Properties, and X-ray Structures of N-Heteroacenes
作者:Prasit Kumar Sahoo、Chandan Giri、Tuhin Subhra Haldar、Rakesh Puttreddy、Kari Rissanen、Prasenjit Mal
DOI:10.1002/ejoc.201600005
日期:2016.3
chromatographic purifications could be avoided after the solvent-free syntheses. The UV/Vis absorption spectra of the pyrazaacenes show intense absorption bands in the near-IR region. The single-crystal X-ray analyses of selected pyrazaacene derivatives showed pairwise π–π interactions and some C–H···π interactions, which could account for some of the photophysical features of the compounds in the solid
所描述的机械化学方法是概念验证的一个例子,在该方法中,在无溶剂球磨条件下实现了基于溶液的乏味、收率低且困难的吡氮杂并苯合成;该方法简单、高产、省时、环保。合成的化合物还包括吡氮杂并苯(N-杂并苯),它们是含有芘结构单元的辛苯类似物。该化合物微溶于普通溶剂,无溶剂合成后可避免柱层析纯化。吡氮杂并苯的紫外/可见吸收光谱在近红外区域显示出强烈的吸收带。选定的吡氮杂并苯衍生物的单晶 X 射线分析显示成对的 π-π 相互作用和一些 C-H…π 相互作用,