Divergent behavior of cobalt-complexed enyne having a leaving group

Article abstract of DOI:10.1016/S0040-4039(99)00791-1

Behavior of the compounds 2 with a Co-complexed enyne moiety was examined. When R in 2 was a prim-alkyl group, the cyclization to give a cyclobutane proceeded in high yield, whereas, when R was bulkier, an interesting substitution involving a 1,2-shift wa