Carbon-SO3H: a novel and recyclable solid acid catalyst for the synthesis of spiro[4H-pyran-3,3′-oxindoles]

Carbon-SO3H: a novel and recyclable solid acid catalyst for the synthesis of spiro[4H-pyran-3,3′-oxindoles]

Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 54, Issue 20, 15 May 2013, Pages 2466-2471

B. Maheshwar Rao, G. Niranjan Reddy, T. Vijaikumar Reddy, B.L.A. Prabhavathi Devi, R.B.N. Prasad, J.S. Yadav, B.V. Subba Reddy,