Glycerol menthonide, 2a, has been prepared from menthone, 1, and glycerol under acidic conditions and has been shown to be mixture of at least 4 isomers. One of the isomers, 2a, has been isolated after conversion to the 4-bromobenzoate, 3a. Methanolysis followed by oxidation with Dess-Martin reagent yielded an aldehyde, 4a. The aldehyde was reacted with phenylmagnesium bromide to yield alcohol 5a.