Termhedron L.etters, Vol. 35, No. 38, pp. 7089-7092. 1994 Elsevier Science Ltd Printed in Great Britain oo40-4039/94 $7.oo+o.O0 ... Aminolysis of Oxetanes: Quite Efficient Catalysis by Lanthanide(III) Trifluoromethansulfonates ... Paolo Crotti,* Lucilla Favero, France Macchia, and Mauro Pineschi Dipattimeato di Chiiica Bioorganica, Universita di Piss, via Boaanna 33, 56126 Piss, Italy ... Dedicated to Prof.G.Berti on the occasion of his 70th birthday