Synthesis of 3-Phosphonyl Pyrano[3,2- c]pyrazol-7(1 H)-one
Chen Bo, Liu Weishun, Zhang Jianfang, Liu Jiayi, Deng Guisheng
Chin. J. Org. Chem. . 2018, (4): 975 -980 .  DOI: 10.6023/cjoc201710030