Benzofurazans are important pharmaceutical intermediates. Benzofurazans are known bioisosteres of the nitro group. Both oxadiazoles and nitro groups have strong electron-withdrawing properties, but when optimizing drug-like properties such as activity, selectivity, and stability, the absence of standard charges in the oxadiazole structure may be more beneficial to drug products. What's more, nitro groups have been identified as toxic groups, and it is routine to remove or replace them in the early stages of drug development.
Benzene is an important organic compound with the chemical formula C6H6, and its molecule consists of a ring of 6 carbon atoms, each with 1 hydrogen atom. Benzene is a sweet, flammable, colorless and transparent liquid with carcinogenic toxicity at room temperature, and has a strong aromatic odor. It is insoluble in water, easily soluble in organic solvents, and can also be used as an organic solvent itself. The ring system of benzene is called benzene ring, and the structure after removing one hydrogen atom from the benzene ring is called phenyl. Benzene is one of the most important basic organic chemical raw materials. Many important chemical intermediates can be derived from benzene through substitution reaction, addition reaction and benzene ring cleavage reaction.