The addition-beta -elimination mechanism is a powerful method for the produ
ction of organometallic derivatives. Using this new method, we report the f
irst transformation of enol ethers into the corresponding vinyl zirconium d
erivatives. Moreover, the in situ formation of TI(II) and subsequent reacti
on with halogeno alkynes offers a new route for the preparation of function
alized alkynyl titanium and trismetalated olefin derivatives. (C) 2001 Else
vier Science B.V. All rights reserved.