CHEMISTRY

Intramolecular reversible cyclization of amides of $8$-($2^1,3^1(\mathrm{CO}),6^1,5^1(\mathrm{CO})$-dibenzoylenepyridyl-$4^1$)-naphthoic–$1$-acid

G. Ya. Doubur, G. Ya. Vanag

Latvian Institute of Organic Synthesis