The reactions of 4,4'-dinitrodifurazanyl ether 1 with Na salts of hydroxyfurazans 2a-e were studied. The nitrofurazanyl fragment is replaced by the more nucleophilic R-furazanyl group; the observed transetherification affords unsymmetrical derivatives of difurazanyl ether. The ratio of the rate constants for the successive reaction steps was determined.