title: An efficient route to highly strained cyclobutenes: indium-catalyzed reactions of enynals with alkynes.
abstract: 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.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou City, Guangdong Province 510640, China. zhusf@scut.edu.cn.
authors.forename: Renxiao
authors.initials: R
authors.lastname: Liang
authors.forename: Huanfeng
authors.initials: H
authors.lastname: Jiang
authors.forename: Shifa
authors.initials: S
authors.lastname: Zhu