The utility of the thermal rearrangement of a-amino ketones, a-hydroxy imines, and imine acid salts for the The 2-aminocyclohexanones were synthesis of a variety of 2-alkylamino-2-phenylcyclohexanones is described. reduced and the stereochemistry of four of the resulting amino alcohols determined.
The preparation of the cis and trans isomers of 3,8-dimethyl-c«-l,2-diaza-l-cyclooctene (1 and 2, R = CHs) and the synthesis of cis-1,2-diaza-1 -cyclooctene (3) are described. The irradiation of these compounds and of /rani-l,2-diphenyl-cz's-l,2-diaza-l-cyclooctene (2, R = C6H5) in the presence and in the absence of triplet sensitizers is also discussed. In all cases, differences in the amounts of disproportionation and coupled products were noted when product distributions observed in the sensitized reactions were compared with those of the nonsensitized photolyses. These variations in product ratios were rationalized in terms of spin-correlation effects.Recently, there has been considerable interest in the .(1) This is the 47th in a series of papers concerned with the preparation and decomposition of azo compounds. For the previous paper, see
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