Chemoselective cyclization of aminonicotinic acid derivatives to 1,8-napthyridin-2-ones via a potential intramolecular azadiene-ketene electrocyclization reaction
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Chemoselective cyclization of aminonicotinic acid derivatives to 1,8-napthyridin-2-ones via a potential intramolecular azadiene-ketene electrocyclization reaction