Synthesis of Di- γ-pyrano[2,3- a;2',3'- f]naphthalene Derivatives Catalyzed by KF/Al 2O 3
ZHOU Jie-Xing,b, WANG Xiang-Shan* ,a,c, ZENG Zhao-Sen a
ZHANG Mei-Mei a, SHI Da-Qing,c, TU Shu-Jiang,c
Chin. J. Org. Chem. . 2007, (06): 786 -789 .