4-Methylcyclohexene
4-Methylcyclohexene is an organic compound consisting of cyclohexene with a methyl group substituent attached to carbon most distant from the alkene group. Two other structural isomers are known: 1-methylcyclohexene and 3-methylcyclohexene. All are colorless volatile liquids classified as a cyclic olefins. They are specialized reagents.
Methylcyclohexenes are formed by the partial hydrogenation of toluene to methylcyclohexane over ruthenium catalyst.
In the presence of a Cinchona alkaloid, bromination of an alkene can leads to optically active dibromides. For 4-methylcyclohexene, the -configuration leads to two different products: the bromines can add at the axial positions, giving the orientation, or at the equatorial positions, giving the orientation. Similarly, the -configuration produces two different products: axial addition yields the configuration and equatorial addition yields.