Dibutylboron trifluoromethanesulfonate (also called dibutylboron triflate or DBBT) is a reagent in organic chemistry. Its chemical formula is C<sub>9</sub>H<sub>18</sub>BF<sub>3</sub>O<sub>3</sub>S. It is used in asymmetric synthesis for example in the formation of boron enolates in the aldol reaction.