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A 4-oxo-1,4-dihydronicotinic acid driv. of formula (I) and its salt are prepd. by dehydrogating a 4-oxo-1, 4, 5, 6tetrahydronicotinic acid driv. of formula (III) and opt. removing carboxyl protecting… Continue Reading
The title compds. (I; R1=H; R2=F, C1-4 alkyl-substd. ph; R3=1 - pyrrolidinyl or 1-piperazinyl; R1a=carboxyl-protecting gp.; R2a= substd. ph; R3a=C1-4 alkyl or C1-4 alkylamino gp.-substd.… Continue Reading