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tert-Butyl 4-{5-[3-(tri-fluoro-meth-oxy)phen-yl]-1,2,4-oxa-diazol-3-yl}piperazine-1-carboxyl-ate. 2013

Swamy Sreenivasa, and Karikere Ekanna Manojkumar, and Arakyathanahalli Kempaiah, and Parameshwar Adimoole Suchetan, and Bandrehalli Siddagangaiah Palakshamurthy
Department of Studies and Research in Chemistry, Tumkur University, Tumkur, Karnataka 572 103, India.

In the title compound, C18H21F3N4O4, the piperazine ring adopts a chair conformation and the dihedral angle between the oxa-diazole 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, mol-ecules are linked through weak C-H⋯O inter-actions, generating an R 2 (2)(12) motif. Further, secondary C-H⋯O inter-molecular inter-actions link the mol-ecules into C(6) chains along [100].

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