The epoxidation of a number of cyclic and linear terminal alkenes by an O-2
-O-3 mixture at room temperatures catalysed by Fe(TMP)CI is reported. It ap
pears that the alkene forms a primary ozonide which rearranges to a seconda
ry ozonide, and it is the latter which, when catalysed by Fe(TMP)Cl, affect
s the subsequent alkene epoxidation. A number of other metal complexes were
also tested as catalysts, but Fe(TMP)Cl was the most effective. (C) 2000 E
lsevier Science B.V. All rights reserved.