Renxiao Liang, Huanfeng Jiang and Shifa Zhu
Chem. Commun., 2015,51, 5530-5533
DOI:
10.1039/C4CC08506J,
Communication
A catalytic method to synthesize the highly strained cyclobutene was developed. The reaction was believed to proceed through a formal indium-catalyzed [2+2] cycloaddition between electron-deficient enynals and various alkynes.