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Conversion of 2-alkylcyclopentanones into 2-alkyl-2-cyclopentenones with hydrated ferric chloride and cupric chloride

✍ Scribed by G. Cardinale; J. A. M. Laan; S. W. Russell; J. P. Ward

Book ID
104588429
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
429 KB
Volume
101
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

Hydrated ferric chloride, FeCl~3~·6 H~2~O, in a polar, hydroxylic solvent converted 2‐alkylcyclopentanones directly into 2‐alkyl‐2‐cyclopentenones on heating in the presence of air. Yields of isolated products were about 40 %. The scope of the reaction is discussed. With cupric chloride, chloroketones were formed as intermediates, which could be dehydrochlorinated to 2‐alkyl‐2‐cyclopentenones in similar yields.

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