A transmetalation of the oxanickelacycle 7, generated from the 1,3-diene an
d tethered aldehyde in 6 via oxidative cycloaddition to a zerovalent nickel
complex, with various organometallic reagents was investigated. It was fou
nd that the tandem reaction, i.e., cyclization of 6 followed by transmetala
tion of the resulting oxanickelacycle 7, proceeded smoothly using a catalyt
ic amount of zerovalent nickel complex.