2,3-Dehydro Ketoconazole is a synthetic byproduct of Ketoconazole featuring a conjugated 2,3-double bond in the terminal side chain, replacing the saturated methylene group. This structural modification introduces a trans-alkene functionality adjacent to the 1,2,4-triazole moiety, while retaining the core 4-(4-chlorophenyl)-1-(1H-1,2,4-triazol-1-ylmethyl)butan-1-one scaffold. The compound retains two chloroaromatic substituents and a ketone at C-1, but exhibits altered electronic properties due to the unsaturated side chain. It arises via oxidative elimination during API synthesis, specifically during triazole coupling steps. Functions as an HPLC reference standard for quantifying dehydrogenation impurities in Ketoconazole formulations.
