Reaction of 2-alkoxy- and 2-hydroxypropenals with o -phenylenediamine: a route to benzimidazoles and quinoxalines
摘要:
The reaction of o-phenylenediamine with 2-alkoxypropenals at room temperature affords 2-(1-alkoxyvinyl)benzimidazoles (53-68%), while 2-hydroxy-3-arylpropenals give 2-(arylmethyl)quinoxalines (85-86%).