4-Methyldibenzothiophene (MDBT) is a refractory sulfur compound found in fuels.Its gas-phase molar enthalpy of formation has been derived. The hydrodesulfurization (HDS) of MDBT under various conditions have been reported. Application： 4-Methyldibenzothiophene (MDBT) may be used in the synthesis of the following 2-substituted products 2-(3′-carboxypropanoyl)-4-methyldibenzothiophene 2-acetyl-4-methyldibenzothiophene 2-nitro-4-methyldibenzothiophene