Copper-Catalyzed Direct Benzylation of β-Ketoesters with N-Tosylhydrazones
Xu Kai, Shen Chong, Sheng Weijian, Shan Shang, Jia Yixia
Chin. J. Org. Chem. . 2015, (3): 633 -637 .  DOI: 10.6023/cjoc201410045