Synthesis of Pyrazoles, Diazepines,
Enaminones, and Enamino Esters Using 12-Tungstophosphoric Acid as
a Reusable Catalyst in Water
Xiang Chena, Jin Shea, Zhicai Shang*a, Jun Wu*a, Haifeng Wua, Peizhi Zhangb a Department of Chemistry, Zhejiang University, Hangzhou 310027,
P. R. of China Fax: +86(571)87952379; e-Mail: shangzc@zju.edu.cn; b School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310012, P. R. of China
