Polyphosphorous acid catalyzed cyclization in the synthesis of cryptolepine derivatives

• Sheng Biao Wan ^a, ,
• Zhe Lin Liu ^a, ,
• Di Chen ^b, ,
• Qing Ping Dou ^b, ,
• Tao Jiang ^a,

• a Key Laboratory of Marine Drug, Ministry of Education, Medical College, Ocean University of China, Qingdao 266003, China;

• b The Prevention Program, Barbara Ann Karmanos Cancer Institute, and Department of Pathology, School of Medicine, Wayne State University, Detroit, MI, USA

• Received Date: 25 April 2007
  
• Fund Project:

  This work was supported by National Basic Research Program of China (973 Program)(No.2003CB71640).