PROCESS FOR PREPARING QUINOXALINE DERIVATIVES USEFUL FOR TREATMENT AND PROPHILAXIS OF SWINE DYSENTERY AND AS ANIMAL GROWTH PROMOTANTS

摘要

The present invention concerns a process for preparing quinoxaline derivatives of the structural formula I: I wherein the two substituents R on the phenyl ring are equal or different and represents C1-C5 lower alkyl, and R1 is a 6- or 7-position substituent selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy and lower alkanoyl. Such compounds have been found useful in preventing swine dysentery as well as being used as animal growth promotants.