The Rh(I)/(R)-H8-BINAP complex was used as the catalyst in the asym. intermol. olefination of enolizable 1,3-dicarbonyl compds. with 1,6-diynes by [2+2+2]cycloaddn. followed by electrocyclic ring opening. The same reaction was also accomplished with 1,6-enynes by using Rh(I)/S-segphos as catalyst. [on SciFinder(R)]