5e thionyl chloride afforded a mixture of chlorides 7-9 (eq 4). The relative proportions of each chloride depend on the structure of 3, the solvent of reaction, as well as the temperature. Discussion on the rearrangement process will be deferred to the later part of the paper. It should be pointed out, however, that the conversion of 3 to 7 was found to be applicable only to 3 derived from aldehydes (ie, R2= H) or aryl ketones (R1= R2= Ar). For ...
