J. Howarth et al., MOISTURE STABLE DIALKYLIMIDAZOLIUM SALTS AS HETEROGENEOUS AND HOMOGENEOUS LEWIS-ACIDS IN THE DIELS-ALDER REACTION, Tetrahedron letters, 38(17), 1997, pp. 3097-3100
Moisture stable dialkylimidazolium salts act as heterogeneous and homo
geneous Lewis acid catalysts in the Diels-Alder reaction of both croto
naldehyde and methacrolein with cyclopentadiene at low temperatures. T
he heterogeneous system allows the catalyst to be efficiently recycled
. (C) 1997 Elsevier Science Ltd.