فهرس المقالات Hydrophobic-bentonite حرية الوصول المقاله صفحة الملخص نص كامل 1 - Employing a hydrophobic-bentonite as a highly efficient and versatile catalyst for a green one-pot and rapid synthesis of 4H-benzo-[b]-pyran derivatives Mohammad Ebrahim Sedaghat Faranak Farhadi Mohammad Reza Nazarifar Rezvan Sheikhi Kamareji