Condensation of the morpholine enamine of 1‐benzyl‐4‐piperidone with β‐ketoesters yielded 6‐azatetrahy‐drochromones which were debenzylated and aromatized to 6‐azachromones; 2‐azaxanthone has been thus obtained with an improved yield as compared to previous syntheses.
No takes yet. Share an insight, caveat, or question.
Cordonnier et al. (1987) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: