A SIMPLE SINTHESIS OF TROPONES AND RELATED COMPOUNDS
Cyclohexa-2,4- and 2,5-dienones bearing position 2 or 4 a dihalomethyl group (halogen = chlorine or bromine) are smoothly reduced by tri-butyltin hydride to furnish appropriately substituted tropones.Modification of the substituents permits access to a tropolone and to less substituted tropones.The mechanism of this ring expansion process has been discussed.
Barbier, Michael,Barton, Derek H. R.,Devys, Michel,Topgi, Ravindra Satish
p. 5031 - 5038
(2007/10/02)
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