The transmetalation of azazirconacyclopentene 1, prepared by inserting alkyne 8 into azazirconacyclopropane 7, was realized, and the zirconium-carbon bond of complex 1 was transformed to a carbon-carbon bond using a copper(I) salt. Thus, both allyl and formyl groups can be introduced into alkyne carbons in a highly stereoselective manner in a one-pot reaction.