作者:Michel Barbier、Derek H.R. Barton、Michel Devys、Ravindra Satish Topgi
DOI:10.1016/s0040-4020(01)87681-x
日期:1987.1
Cyclohexa-2,4- and 2,5-dienones bearing at position 2 or 4 α 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.
通过氢化三丁基锡将带有2或4位α二卤代甲基(卤素=氯或溴)的环己2,4-和2,5-二烯酮顺利地还原,以提供适当取代的tropone。取代基的修饰允许获得对线酮和较少取代的对苯二酚。已经讨论了这种扩环过程的机理。