N-(2-oxaadamantan-1-yl)ureas of formula I, where R3 is H, C1-C3 alkyl, cyclohexyl or phenyl； R is -[CH2]n -Y； n is 0-15； in -[CH2]n - 0-n/3 of the methylene groups are optionally replaced by non adjacent oxygen atoms； and Y is a 3- or 4-substituted phenyl, a 3- or 4-substituted cyclohexyl, a N-substituted piperidin-4-yl, a N-substituted piperidin-3-yl, a di- or tri-fluorosubstituted phenyl, 4-chloro-3-trifluoromethylphenyl, 3-chloro-4-trifluoromethylphenyl, 4-fluoro-3-trifluoromethylphenyl, or 3-fluoro-4-trifluoromethylphenyl； have epoxide hydrolase (sEH) inhibitory activities similar to those of their N-(adamantan-1-yl)urea analogs. Thus, compounds I are useful as API for the treatment of sEH mediated diseases. Besides, in general, compounds (I) have higher water solubilities and lower melting points, what make them more promising from the point of view of pharmacokinetics and formulation.
