摘要:
Abstractmagnified imageA series of substituted 1,8‐naphthyridine‐3‐carboxylates were synthesized for the first time from the Baylis–Hillman adducts obtained from 2‐chloronicotinaldehyde derivatives. Three methods were adopted to synthesize 1,8‐naphthyridine‐3‐carboxylates, of which the azide‐reduction route (Scheme 5) gave the best yields compared to the other attempted methods (Schemes 2 and 3).