Synthesis of 2-Amino-3-cyano-4-aryl-7,7-dimethyl-5-oxo-4 H-5,6,7,8- tet-rahydrobenzo[ b]pyran Catalyzed by KF-Montmorillonite
ZHUANG Qi-Ya,b,WU Nan a,SHI Da-Qing* ,a,b
TU Shu-Jiang,b,WANG Xiang-Shan,b
Chin. J. Org. Chem. . 2006, (9): 1217 -1220 . 

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