1,2,5-Oxadiazole (Furazan) derivatives from benzoylnitromethane and dipolarophiles in the presence of DABCO: structure and intermediates

Furazan (1,2,5-oxadiazole) derivatives are obtained along with isoxazolines from the reaction of benzoylnitromethane with dipolarophiles in the presence of DABCO. Furazans are shown to derive from the intermediate dibenzoylfuroxan (3,4-dibenzoyl-1, 2,5-oxadiazole-5-oxide) and dipolarophiles under hydrolytic conditions