3,5-Dimethylpiperidine  3,5-Dimethylpiperidines are chemical compounds with the formula C5H8(CH3)2NH. Two diastereomers exist: the achiral "R","S" isomer and the chiral "R","R"/"S","S" enantiomeric pair. 3,5-Dimethylpiperidine is a precursor to tibric acid. The compound is typically prepared by hydrogenation of 3,5-dimethylpyridine. Both diastereomers also arise from the reduction of 3,5-dimethylpyridine with lithium triethylborohydride.