Stereochemistry of the 2‐Aryl‐cyclohexanones. I. Analysis of the Configuration and Conformation of the cis‐trans‐Isomeric 2,6‐Dimethyl‐2‐aryl‐cyclohexan‐1‐ones by the Aid of their Oximes
Desulfurization of the n‐butylthiomethylene ketone 6 with Raney nickel yields a mixture of trans‐ and cis‐stereoisomers 7 and 8, the conformations of which are 7A and 8B, respectively. While the ketone 7 gives rapidly and quantitatively the oxime 9, the isomer 8 reacts much more slowly to a mixture of 9 and 10. A detailed analysis of the configuration and conformation of the ketones 7 and 8 as well as the oximes 9 and 10 is given.