Piperazine is an organic compound consisting of a six-membered ring containing two nitrogen atoms in opposite positions in the ring. The chemical formula of piperazine is C4H10N2, and it is an important pharmaceutical intermediate. Pyrimidines and piperazines are known to be the backbone of many bulk compounds and important core structures for approved drugs; studies have shown that combining a pyridine ring with a piperazine moiety within a single structural framework enhances biological activity.
1,2-Benzoisoxazole is an aromatic organic compound with the molecular formula C7H5NO containing a benzene-fused isoxazole ring structure. The compound itself has no general application; however, functionalized benzoxazoles and benzoisoxazoles have a variety of uses, including therapeutic drugs such as some antipsychotics (including risperidone, paliperidone, cape ketone and iloperidone) and the anticonvulsant azolamide.