Phosphoric acid supported on alumina (H3PO4/Al2O3) is an efficient catalyst for the catalytic multi-component condensation reaction and a wide variety of syntheses of benzoxanthene pigments in good yields. The remarkable features of this new procedure are high conversions, shorter reaction times, cleaner reaction, and simple experimental and work-up procedures.
负载于氧化铝上的
磷酸(H3PO4/
Al2O3)是一种高效的催化剂,可用于催化多组分缩合反应及一系列在良好产率下合成苯并二
氧杂蒽类色素的合成中。该新方法的显著特点包括高转化率、较短的反应时间、更纯净的反应过程及简单易行的实验和后处理步骤。