Baker’s Yeast-Mediated Regioselective Reduction of 2,4-Dinitroacylanilines: Synthesis of 2-Substituted 6-Nitrobenzimidazoles - Olguín, Luís F; Jiménez-Estrada, Manuel; Bárzana, Eduardo; Navarro-Ocaña, Arturo (Synlett, 2005)