فهرس المقالات Urea-hydrogen peroxide حرية الوصول المقاله صفحة الملخص نص كامل 1 - Urea-hydrogen peroxide/silica phosphoric acid-catalyzed oxidation- condensation Tandem reaction: One-pot synthesis of 2-substituted benzimidazoles from alcohols Ahmad Reza Momeni Heshmat Allah Samimi Reyhaneh Jahanian