Fig. 1: Background and reaction design.
From: Pathway-divergent coupling of alkynes and cyclobutenes through enantioselective cobalt catalysis
a Possible reaction pathways for transition metal-catalyzed coupling of alkynes and alkenes. b Representative natural products and biologically active molecules containing a four-membered ring moiety. c Catalytic enantioselective carbon–carbon forming reactions of nonpolar cyclobutenes. d Strategies for divergent coupling through oxidative cyclization. e Cobalt-catalyzed pathway-divergent enantioselective coupling of alkynes and cyclobutenes (this work). EWG electron-withdrawing group, PC photocatalyst.
