Asymmetrically substituted pyromellitic diimides of formula:
in which R, and R2 are not the same and each represents hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, lower alkanoyl, benzoyl, di(lower alkyl)amino, lower alkanoylamino, benzoylamino, lower alkoxycarbonylamino or certain substituted phenyl or substituted lower alkyl radicals and each ofX and Y is hydrogen, halogen or lower alkyl, are novel compounds that are obtainable by treating pyromellitic dianhydride with two appropriately substituted amines or with ammonia and one amine.
The compounds can be administered to ruminant animals to increase their feed efficiency and suitable compositions for this purpose include the compounds with an inert carrier.
式中的不对称取代的
吡咯烷二
亚胺:
式中:R, 和 R2 不相同,各自代表氢、烷基、烯基、炔基、环烷基、低级烷酰基、苯甲酰基、二(低级烷基)
氨基、低级烷酰基
氨基、苯甲酰基
氨基、低级烷氧基羰基
氨基或某些取代苯基或取代低级烷基,X 和 Y 各自代表氢、卤素或低级烷基。
这些化合物可用于反刍动物,以提高其饲料效率,用于此目的的合适组合物包括带有惰性载体的化合物。