Bis(imido) chromium(VI) complexes are efficient catalysts for promoting the
cyclopropanation of activated monosubstituted olefins with ethyl diazoacet
ate. 2,2'-Disubstituted activated olefins and non-activated alpha- and cycl
o-olefins, however, are much less reactive. (C) 1999 Elsevier Science Ltd.
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