Triphenylphosphine-Mediated Eco-Friendly Synthesis of (Z)-Diisopropyl-2-(Cyano(Aryl)Methylene)Hydrazine-1,1-Dicarboxylates Using Potassium Hexacyanoferrate(II) as a Cyanide Source
作者:Xiaochun Hu、Zhouxing Zhao、Zheng Li
DOI:10.1080/10426507.2012.658983
日期:2012.8.1
triphenylphosphine-mediated synthetic method for (Z)-diisopropyl-2-(cyano (aryl)methylene)hydrazine-1,1-dicarboxylates via one-pot three-component reactions usingpotassiumhexacyanoferrate(II) as a cyanidesource was described. This protocol has advantages of no use of strong toxic cyanating agents, high yield, and simple work-up procedure. GRAPHICAL ABSTRACT
The reaction of acyl cyanides with “Huisgen zwitterion”: an interesting rearrangement involving ester group migration between oxygen and nitrogen atoms
作者:Xu-Guang Liu、Yin Wei、Min Shi
DOI:10.1039/b913196e
日期:——
novel rearrangementinvolving ester group migration was found in the reaction of acyl cyanides and Huisgen zwitterions, affording hydrazone derivatives at higher temperature (90 °C) and azine derivatives at lower temperature (20 °C), respectively. Interestingly, the reaction temperature is identified as a critical factor to control the final products. Presumably, the rearrangementinvolving ester group