作者:Anne Tromelin、Pierre Demerseman、René Royer
DOI:10.1055/s-1985-31435
日期:——
2-Nitrobenzo[b]furans 4 are prepared in improved yields by reacting o-hydroxybenzaldehydes 1 and bromonitromethane (2) at low temperature in order to avoid the dehydration of the aldol intermediate 3 in the alkaline condensation medium. This aldol 3 is then quantitatively dehydrated by heating in acetic anhydride.
通过在低温下将邻羟基苯甲醛1与溴硝基甲烷2反应,以避免在碱性缩合介质中脱水,从而提高2-硝基苯并[b]呋喃4的产率。随后,通过在乙酸酐中加热,该醛醇中间体3可定量脱水。