Previously unknown derivatives of tetrahydro[a]phenanthridine containing annelated benzoquinoline and cyclohexene nuclei were prepared by condensation of azomethines of the 2-naphthylamine series with cyclohexanone. The possibility of synthesis of such compounds without preliminarily preparing Schiff bases was demonstrated. The effect of substituents in the aromatic ring of the azomethine on the yield of the target products was elucidated. The IR, UV, H-1 NMR, and mass spectra of the synthesized compounds were discussed.
Previously unknown derivatives of tetrahydro[a]phenanthridine containing annelated benzoquinoline and cyclohexene nuclei were prepared by condensation of azomethines of the 2-naphthylamine series with cyclohexanone. The possibility of synthesis of such compounds without preliminarily preparing Schiff bases was demonstrated. The effect of substituents in the aromatic ring of the azomethine on the yield of the target products was elucidated. The IR, UV, H-1 NMR, and mass spectra of the synthesized compounds were discussed.
Thermal stabilization of polyimides with boric acid esters
作者:V. I. Grachek、E. T. Krut’ko、L. Yu. Osmolovskaya、A. I. Globa
DOI:10.1134/s1070427211090205
日期:2011.9
New and previously synthesized boric acid esters were tested as thermal stabilizing additives to polyimides.