فهرس المقالات Silica phosphoric acid حرية الوصول المقاله صفحة الملخص نص كامل 1 - Nano-Silica phosphoric acid: an efficient catalyst for one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones (thiones) under solvent-free or sonication conditions Abdolhamid Bamoniri Bi Bi Fatemeh Mirjalili Sedigheh Nazemian حرية الوصول المقاله صفحة الملخص نص كامل 2 - 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