tert-Butyl 4-{5-[3-(tri­fluoro­meth­oxy)phen­yl]-1,2,4-oxa­diazol-3-yl}piperazine-1-carboxyl­ate

In the title compound, C(18)H(21)F(3)N(4)O(4), the piperazine ring adopts a chair conformation and the dihedral angle between the oxa­diazole and benzene rings is 6.45 (14)°. The C atoms and their attached H atoms in the piperazine ring are disordered, with site-occupation factors of 0.576 (12) and 0.424 (12). In the crystal, mol­ecules are linked through weak C—H⋯O inter­actions, generating an R (2) (2)(12) motif. Further, secondary C—H⋯O inter­molecular inter­actions link the mol­ecules into C(6) chains along [100].