Dibenzonaphthyridinones: Heterocycle-to-Heterocycle Synthetic Strategies and Photophysical Studies
摘要:
A heterocycle-to-heterocycle strategy is presented for the preparation of highly fluorescent and solvatochromic dibenzonaphthyridinones (DBNs) via methodology that leads to the formation of a tertiary, spiro-fused carbon center. A linear correlation between the results of photophysical experiments and time dependent density functional theory calculations was observed for the lambda(max) of excitation for DBNs with varying electronic character.
Remarkably Efficient and Direct Route to Quinolines and Benzoazepines from the Condensation of Benzoxazinediones with Phosphonium Carbanion Salts
作者:Wafaa M. Abdou、Azza A. Kamel
DOI:10.1080/00397910701572670
日期:2007.11
Treatment of 2H-3,1-benzoxazine-2,4(1H)-dione (1a) with vinyltriphenyl-phosphonium bromide (2a) gives substituted benzoazepine 8a (48% yield) and indolizinone 12 (27% yield), whereas substituted quinolinone 15 and benzoazepine 8b were isolated from the reaction of N-methylisatoic anhydride (1b) and 2a. Furthermore, a series of quinoline derivatives was synthesized from the reactions of la and 1b with allyl-(2b), alkyl-(2c), (2d), and cyanomethyl-(3) triphenylphosphonium salts.