Catalytic Asymmetric Three-Component 1,3-Dipolar Cycloaddition of Aldehydes, Hydrazides, and Alkynes

Takuya Hashimoto, Yuka Takiguchi, and Keiji Maruoka 

 J. Am. Chem. Soc., 2013, 135 (31), pp 11473–11476 

DOI: 10.1021/ja405444c