Solubilized Lanthanide Triflates: Lewis Acid Catalysis by Polyether and Poly(ethylene glycol) Complexes of Ln(OTf)3
journal contribution
posted on 1998-04-03, 00:00 authored by Helen C. Aspinall, Jennifer L. M. Dwyer, Nicholas Greeves, Edward G. McIver, J. Christopher WoolleyComplexes of lanthanide triflates
Ln(OTf)3 with polyether
(MeO(CH2CH2O)nMe)
and poly(ethylene glycol)
(HO(CH2CH2O)nH)
ligands (n = 2−4) have been prepared and
characterized,
and the activity of these complexes as Lewis acid catalysts has been
investigated. The
complexes
[Ln(OTf)3(HO(CH2CH2O)nH)]
have been shown to catalyze the allylation of a range
of aldehydes with allyltributylstannane, and the complexes
[Ln(OTf)3(MeO(CH2CH2O)nMe)]
catalyze the Diels−Alder addition of
N-crotonyloxazolidinone to cyclopentadiene. The
single-crystal X-ray structures of
[Dy(OTf)2(H2O)2(MeO(CH2CH2O)4Me)][OTf]
and [La(OTf)3(THF)(HO(CH2CH2O)4H)] are
reported.
