SYNTHESIS AND REACTIONS OF FURO[3,2-c]QUINOLINES AND FVRO[3,2-c]COUMARINS
作者:Hisham A. Abd El-Nabi、A. M. Now El-Din
DOI:10.1080/00304940309355862
日期:2003.10
or coumarin systems might influence their reactivity, it was thought desirable to synthesize systems having both rings. Reaction of the sodium saltlo of N-substituted quinolones la,b with an equimolar ratio of oxalyl chloride in dry toluene at 60°C gave yellow furo[3,2-c]quinolones 3a,b in 73% and 75% yield respectively (Scheme I ) . Elemental analyses and spectral data helped characterize the