Abstract
Displacement reactions between alkali hxlides and several cyclic allylic-type halides, namely, 2,2-dihalo-3-phenylcyclo,-butenones, have been found to proceed with rearrangement to give 2,4-dihalo-3-phenylcyclobutenones. The 2,2-dihalocompounds also were found to rearrange to the corresponding allylic isomers on heating with triethylamine. The allylic iodides, 2-fluoro-4-iodo- and 2-chloro-4-iodo-3-plienyl-2-cyclobutenones,rearranged in reactions with halogens to form 2,2-dihalo-3-phenylcyclobutenones. Evidence is presented for the stereospecific nature of these reactions.
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