1589518-88-6Relevant articles and documents
Poly(phosphoric acid) (PPA)-Promoted 5- exo -Cyclization of Iminium Ions Generated in Situ: A Facile Access to Functionalized Indene Derivatives
Zhu, Yi-Fan,Geng, Xin-Le,Guan, Yong-Hong,Teng, Wei,Fan, Xiaohui
, p. 1821 - 1827 (2017)
A metal-free Bronsted acid promoted two-component reaction between cinnamaldehydes and sulfonamides is described. This cascade process provides a simple and atom-economical alternative synthesis of a range of functionalized indenes from easily available starting materials. The resulting N -indenylsulfonamides were readily converted into the corresponding indenylenamines or indanones.