Synthesis of 3-Ethoxycarbonyl-4-hydroxyquinoline N-Oxides from the Baylis−Hillman Adducts of o-Nitrobenzaldehydes
摘要:
[GRAPHICS]The reaction of the Baylis-Hillman adducts 1a-e of o-nitrobenzaldehydes and trifluoroacetic acid at 60-70 degrees C gave 3-ethoxycarbonyl 4-hydroxyquinoline N-oxide derivatives 3a-e in good to moderate yields.