The heteroaromatic anion lithium 2-(diisopropylamino)-1,2-thiaborolide (3)
has been prepared by a synthesis using the Grubbs ring-closing metathesis.
3 has been converted to the Cp*Ru complex 10, the Cp*ZrCl2 complex 11, and
the Me2Si-bridged CpZrCl2 complex 15.