Scheme 1From: Facile and efficient one-pot synthesis of benzimidazoles using lanthanum chloride Reaction between 1,2-phenylenediamine (1) and 3,4,5-trimethoxybenzaldehyde (2) that yielded 2-(3,4,5-trimethoxyphenyl)-1 H -benzo[d]imidazole (3). Back to article page