Synthesis of novel pyridocoumarins and benzo-fused 6-azacoumarins
摘要:
Benzo[7,8]-fused 6-azacoumarins are prepared from 4-quinolinol by treatment with PPh3 and DMAD, or from 3-formyl-4-quinolinol by Wittig reaction with carbalkoxyalkylidene(triphenyl) phosphoranes. Angular pyridocoumarins are prepared from 8- or 6-quinolinols with PPh3 and DMAD, or from the reactions of 5,6- or 7,8-quinolinediones with carbalkoxymethylene(triphenyl) phosphoranes. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of novel pyridocoumarins and benzo-fused 6-azacoumarins
摘要:
Benzo[7,8]-fused 6-azacoumarins are prepared from 4-quinolinol by treatment with PPh3 and DMAD, or from 3-formyl-4-quinolinol by Wittig reaction with carbalkoxyalkylidene(triphenyl) phosphoranes. Angular pyridocoumarins are prepared from 8- or 6-quinolinols with PPh3 and DMAD, or from the reactions of 5,6- or 7,8-quinolinediones with carbalkoxymethylene(triphenyl) phosphoranes. (c) 2007 Elsevier Ltd. All rights reserved.