Syntheses of 2-Amino-3,1-benzothiazines Catalyzed by Cationic Ytterbium Complex
Feng Shan'e, Hua Lu, Yao Zhigang, Xu Fan
Chin. J. Org. Chem. . 2017, (12): 3257 -3261 .  DOI: 10.6023/cjoc201709043