Synthesis of heterocyclic-fused benzopyrans via the Pd(<scp>ii</scp>)-catalyzed C–H alkenylation/C–O cyclization of flavones and coumarins
作者:Yechan Kim、Youngtaek Moon、Dahye Kang、Sungwoo Hong
DOI:10.1039/c4ob00180j
日期:——
derivatives. The synthetic utility of the one-pot sequence was demonstrated by obtaining convenient access to coumarin-annelated benzopyrans. The reaction scope for the transformation was found to be fairly broad, affording good yields of a wide range of flavone- or coumarin-fused benzopyran motifs, which are privileged structures in many biologically active compounds.