Regiospecific synthesis of 6-aryl-3-cyano-5-alkylamino/arylamino-1-p-tolyl-1H-pyrazolo[4,3-d]pyrimi din-7(6H)-ones via iminophosphorane-mediated annulation

Regiospecific synthesis of 6-aryl-3-cyano-5-alkylamino/arylamino-1-p-tolyl-1H-pyrazolo[4,3-d]pyrimi din-7(6H)-ones via iminophosphorane-mediated annulation

Ming-Hu Wu, Ji-Huan Hu, Dong-Sheng Shen, Paul Bremond, Haibing Guo
Tetrahedron, 66 5112-5120 (2010)