Unexpected Pd-Catalyzed Coupling, Propargyl−Allenyl Isomerization and Alder−Ene Reaction: Facile Synthesis of Some Not Readily Available 2,3-Dihydrofuran Derivatives

Abstract

An interesting sequential reaction involving Pd-catalyzed coupling, propargyl-allenyl isomerization, and Alder-ene cycloaddition is reported, providing a facile synthesis of some not readily available 2,3-dihydrofurans from electron-deficient vinyl or aromatic halides and 1-aryl-prop-2-ynyl 3'-methylbut-2'-enyl ethers.