In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Palladium-catalyzed Suzuki coupling synthesis and biological activities of ten new 1,3,4-oxadiazole derivatives, published in 2020-03-31, which mentions a compound: 3326-71-4, Name is 2-Furoic hydrazide, Molecular C5H6N2O2, Safety of 2-Furoic hydrazide.
Ten new 2-phenyl-5-((7-phenylquinolin-4-yl)thio)-1,3,4-oxadiazole derivatives I [R = Ph, 3-pyridyl, 4-methoxyphenyl, etc.] were synthesized and their biol. activities were reported. Dichloroquinoline on sequential reactions with different moieties such as 1,3,4-oxadiazole and phenylboronic acid gave desired target derivatives I with excellent yield. In-vitro antimicrobial activity of the synthesized compounds I was evaluated against Gram-pos. and Gram-neg. bacteria. The synthetic steps involved various bond formations such as C-S and C-C which occurred with the help of nucleophilic substitution reaction. The last synthetic step involved palladium-catalyzed Suzuki coupling reaction to afford C-C bond formation.
In addition to the literature in the link below, there is a lot of literature about this compound(2-Furoic hydrazide)Safety of 2-Furoic hydrazide, illustrating the importance and wide applicability of this compound(3326-71-4).
Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics