Reduction of Different Electron-PoorN-Heteroarylhydrazines in Strong Basic Conditions
作者:Asier Unciti-Broceta、María J. Pineda de las Infantas、Miguel A. Gallo、Antonio Espinosa
DOI:10.1002/chem.200600282
日期:2007.2.12
this reductive process is a base-catalyzed reaction that takes only place in the presence of air, probably through an oxygen-assisted mechanism. As consequence of the specific features of this kind of hydrazone/enehydrazine tautomers, the overall outcome of the process is the synthesis of a Shapiro-type reduction product by simply using a milder version of the Huang-Minlon methodology.
据报道,Wolff-Kishner还原方法在贫电子杂芳族化合物中的首次应用。在基本条件下,具有with型互变异构的含肼杂环已被还原。这种新颖的化学方法已成功地用于以区域选择性方式对许多电子贫乏的杂环进行单脱卤。根据实验结果,该还原过程是碱催化的反应,仅在空气存在下发生,可能是通过氧气辅助机制进行的。由于这种/烯肼互变异构体的特定特征,该方法的总体结果是仅使用温和的Huang-Minlon方法即可合成Shapiro型还原产物。