A Facile Synthesis of 2-Acyl and 2-Alkylaminobenzimidazoles for 5-Lipoxygenase Inhibitors. -A variety of substituted 2-aminobenzimidazoles is prepared from o-phenylenediamines and tested as 5-lipoxygenase inhibitors. Several acylaminobenzimidazoles such as (IIIa)-(IIIf) show good leukotriene inhibition activity. -(LEE, J. H.; AN, M. H.; CHOI, E. H.; CHOO, H.-Y. P.; HAN*, G.; Heterocycles 70 (2006) 1, 571-580; Dep. Biotechnol., Coll. Eng., Yonsei Univ., Seoul 120-749, S. Korea; Eng.) -R. Staver 23-117