Extension of the Biginelli-Type Reaction: One-Pot Synthesis of Pyrimido-pyrimidines and Spirobi[pyrimidine]s Using Potassium Hydrogen Sulfate as a Catalyst
Feng Shi, Runhong Jia, Xiaojing Zhang, Shujiang Tu*, Shu Yan, Yan Zhang, Bo Jiang, Junyong Zhang, Changsheng Yao School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. of China Fax: 86(516) 83403164; e-Mail: laotu@xznu.edu.cn;
