1??Ethyl??1, 4??dihydro??4??oxo??7??(pyridinyl)??3??quinolinecarboxylic acids. I. Synthesis of 3??and 4??(3??aminophenyl) pyridine intermediates

~99%

~%

~%

~%

~91%

~81%

~%

~%

~92%

~%

~%

~%

~%

~%

~%

~%

~%

~82%

~%

~77%

~%

~%

~%