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Stereospecific [1,2]-rearrangement of a spirocyclic ammonium ylide with ring expansion sequence

โœ Scribed by Antonio Saba


Publisher
Elsevier Science
Year
2003
Tongue
French
Weight
142 KB
Volume
44
Category
Article
ISSN
0040-4039

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The Cope rearrangement permits the ring expansion or contraction of cycloalkanes containing a suitable 1,5-diene system. Thus ci.s-1,2-divinylcyclopropanes and cyclo-butanes readily form cycloheptadienes2 and cyclooctadienes 3 respectively. Conversely 4