申请人:EASTMAN KODAK COMPANY
公开号:WO1982002198A1
公开(公告)日:1982-07-08
(EN) The method comprises forming a liquid reaction system of a base catalyst and a 1,2,4-oxadiazole in an organic liquid reaction medium and heating the reaction system to a temperature sufficient to cause the 1,2,4-oxadiazole to be rearranged to a 2-pyrazolin-5-one. (FR) Le procede consiste a former un systeme liquide de reaction d'un catalyseur de base et un 1,2,4-oxadiazole dans un milieu de reaction liquide organique et a chauffer le systeme de reaction jusqu'a une temperature suffisante pour provoquer la transformation de 1,2, 4-oxadiazole en 2-pyrazoline-5-one.