1-Amino-4,5-8-naphthalenetricarboxylic acid-1,8-lactam-4,5-imide-containing macrocycles: Synthesis, molecular modeling and polymerization - Polyimides and Other High Temperature Polymers - page 187

Scheme 1. Synthesis route to macrocycles.
up to 60%. To confirm the cyclic nature of synthesized products they were char-
acterized by mass and NMR spectroscopies. Figs. 1, 2 and Figs. 3, 4 show mass
and 1 H-NMR spectra of synthesized macrocycles, respectively. The most intense
peak in the mass spectra of synthesized molecules is due to molecular ion as can