Axially Chiral Cyclohexylidene-ethanones

Solladie and Zimmerman have reported a series of novel chiral liquid crystals which are believed to be the first to incorporate a molecular unit which possesses axial chiral- 

Where Ph denotes 1,4-phenyl and Ch denotes trans-1,4-cyclohexyl. 

The chiral sulfoxide (134) was obtained from the reaction of the Grignard reagent of 

Stdieme 9. Synthesis of substituted arylcyclo-hexylidene ethanones. 

Of the seven optically active cyclohexy-lidene ethanones synthesized, only three showed chiral nematic phases these materials are listed in Table 11. 

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