Highly Efficient and Recyclable Catalyst HBF<sub>4</sub>?SiO<sub>2</sub> Catalyzed Synthesis of β-Enamino Compounds Under Solvent-free Conditions

GAO Han, JIA Xu-dong, DUAN Hai-feng*, LIN Ying-jie*, GAO Jun-gang, LIANG Da-peng and WU Mao-cheng

Chemical Research in Chinese Universities . 2011, (5): 792 -794 .