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Beilstein J. Org. Chem. 2010, 6, No. 63, doi:10.3762/bjoc.6.63
Graphical Abstract
Figure 1: Treatment of 4-chloro-1-aryl-1-butanones 1 with PCl3/AcOH lead to unexpected cyclic product 2 inste...
Scheme 1: Preparation of cyclic furans 2a–e and ethyl esters 4a,c from chloroarylbutanones 1.
Scheme 2: Proposed reaction mechanism for the cyclization reaction.
Scheme 3: Acyclic products are obtained from pentanones 9a,b and butanone 9c.