1,3,4-oxadiazole derivatives and process for producing the same

摘要

A process for the preparation of compounds represented by formulae (I) and (IV): (wherein symbols in the formulae are described in the description) and the novel 1,3,4-oxadiazole derivative compound represented by formula (I). According to the present invention, preparation of intermediates (compounds of formula (IV)) of 1,3,4-oxadiazole derivatives useful as pharmaceuticals (elastase inhibitors) can be prepared efficiently via novel synthesis intermediates (compounds of formula (I)).