Discovery of boronic acids as novel and potent inhibitors of fatty acid amide hydrolase.

A series of commercial phenyl-, heteroaryl-, alkyl-, and alkenylboronic acids were evaluated for their FAAH and MGL inhibitory activities. The compounds were generally selective for FAAH, with IC50 in the nanomolar or low-micromolar range. Eight of these compounds inhibited MGL with IC50 in the micromolar range. The most potent compound, phenylboronic acid with para-nonyl substituent (13), inhibited FAAH and MGL with IC50 of 0.0091 and 7.9 microM, respectively.