Methylation of 3- [1-arylyhdrazono-L-threo-2,3,4-trihydroxybutyl] 6,7-dimeth yl-1H-quinoxalin-2-ones

ABSTRACT

Several N-methyl derivatives of 3-[1-arylhydrazono-L-threo-2, 3, 4- trihydroxybutyl]-6, 7-dimethyl-1H-quinoxalin-2-ones were prepared and converted to 3-[5-[acetoxymethyl]-1-arylpyrazol-3-yl]-1, 6, 7 -trimethylquinoxalin-2-ones. Upon deacetylation, compound VIII and IX gave products identical with those obtained by methylation of 3-[1- aryl-5-[hydroxymethyl]-pyrazol-3-yl]-6, 7-dimethyl-1H-quinoxalin -2- ones