An Efficient and Rapid Synthesis of 1,4-Dihydropyrano Pyran and 1,4-Dihydropyrano Quinoline Derivatives Using Copper Nanoparticles Grafted on Carbon MicrospheresKaminwar Nitishkumar S. & Tekale Sunil U. & Pokalwar Rajkumar U. & Kótai László & Pawar Rajendra2022PDF1.6 MBEN