title: DABCO-catalyzed unusual [4 + 2] cycloaddition reaction: non-substituted allenoate acts as a four-carbon synthon and facile synthesis of spirooxindoles.
abstract: A DABCO-catalyzed domino reaction between methyleneoxindoles and allenoates which enables the direct synthesis of spirooxindoles is reported. This is the first example of a non-substituted allenoate to act as a four-carbon synthon in a tertiary amine-catalyzed reaction.
authors.affiliation: Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China. aiminyu@tjut.edu.cn mengxiangtai23@mail.nankai.edu.cn.
authors.forename: Yufen
authors.initials: Y
authors.lastname: Liu
authors.forename: Yanlong
authors.initials: Y
authors.lastname: Du
authors.forename: Aimin
authors.initials: A
authors.lastname: Yu
authors.forename: Haifeng
authors.initials: H
authors.lastname: Mu
authors.forename: Xiangtai
authors.initials: X
authors.lastname: Meng