A two-step access to fused-/spiro-polycyclic frameworks <i>via</i> double Heck cascade and acid-driven processes
作者:Komal Goel、Gedu Satyanarayana
DOI:10.1039/d3ob01112g
日期:——
This report illustrates the rapid construction of two divergent classes of polycyclic frameworks, benzo[a]fluorenones and spiro-chromenone indenes, via a double Heck cascade and an acid-driven cyclization from easily accessible precursors.
Palladium-catalyzed tandem reactions of 2-alkenylphenyl-acetylenes with CuCl2 or CuBr2 afforded 3-chloro- or 3-bromo-1-methyleneindenes in good yields; these compounds could be further elaborated viapalladium-catalyzed coupling reactions.