TY - JOUR AU - Masoud Mokhtary AU - Faranak Najafizadeh TI - Polyvinylpolypyrrolidone-bound boron trifluoride (PVPP-BF3); a mild and efficient catalyst for synthesis of 4-metyl coumarins via the Pechmann reaction JO - Comptes Rendus. Chimie PY - 2012 SP - 530 EP - 532 VL - 15 IS - 6 PB - Elsevier DO - 10.1016/j.crci.2012.03.004 LA - en ID - CRCHIM_2012__15_6_530_0 ER -