tolane‐type liquidcrystals with amidegroup as terminalgroup have been prepared. The terminalamidegroups were modified, and the influence of these structural parameters on liquidcrystal phases was investigated by polarizing optical microscope (POM) and differential scanning calorimetry (DSC). Three of these new compounds exhibit nematic phase, good thermal stabilities. In general, these liquid crystals
Hydrazine Hydrate Accelerates Neocuproine–Copper Complex Generation and Utilization in Alkyne Reduction, a Significant Supplement Method for Catalytic Hydrogenation
作者:Yongsheng Zhang、Jincheng Wang、Zhenjiao Yang、Zeng Zhang、Xiaoyan He、Guoliang Chen、Gang Huang、Xiuhong Lu
DOI:10.1021/acs.joc.1c01803
日期:2021.12.17
Diimine (HN═NH) is a strong reducingagent, but the efficiency of diimine oxidized from hydrazine hydrate or its derivatives is still not good enough. Herein, we report an in situ neocuproine–copper complex formation method. The redox potential of this complex enable it can serve as an ideal redox catalyst in the synthesis of diimine by oxidation of hydrazine hydrate, and we successfully applied this