Tetrahedron p. 5031 - 5038 (1987)
Update date:2022-08-04
Topics:
Barbier, Michael
Barton, Derek H. R.
Devys, Michel
Topgi, Ravindra Satish
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.
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Doi:10.1002/jhet.392
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