Baker’s Yeast-Mediated Regioselective Reduction of 2,4-Dinitroacylanilines: Synthesis of 2-Substituted 6-Nitrobenzimidazoles
作者:Arturo Navarro-Ocaña、Luís F. Olguín、Manuel Jiménez-Estrada、Eduardo Bárzana
DOI:10.1055/s-2004-837203
日期:——
Several 2,4-dinitro-N-acylanilines were regioselectively reduced at the C-2 position by baker's yeast in slightly basic media (pH = 7.5) to afford 2-amino-4-nitroacylanilines, which were then cyclized under acidic conditions to the corresponding 2-substituted-6-nitrobenzimidazoles. The benzimidazoles thus obtained can be employed as precursors for bioactive derivatives.
几种 2,4-二硝基-N-酰基苯胺在微碱性介质(pH = 7.5)中被面包酵母在 C-2 位置区域选择性还原,得到 2-氨基-4-硝基酰基苯胺,然后在酸性条件下环化为相应的 2-取代-6-硝基苯并咪唑。由此获得的苯并咪唑可用作生物活性衍生物的前体。