A practical and efficient procedure for the one‐pot multicomponent couping of aryl aldehydes, 2‐naphthol and cyclic 1,3‐dicarbonyl compounds using perchloric acid adsorbed on silica gel (HClO4‐SiO2) as a highly efficient, inexpensive, convenient, reusable heterogeneous catalyst under solvent‐free conditions has been developed. Various biologically important 12‐aryl‐8,9,10,12‐tetrahydrobenzo[a]xanthen‐11‐one
一种实用高效的方法,可通过吸附在
硅胶上的
高氯酸(HClO 4 -SiO 2)作为
芳烃醛,
2-萘酚和环状1,3-二羰基化合物的单锅多组分偶合,高效,廉价,方便,已开发出在无溶剂条件下可重复使用的多相催化剂。各种具有
生物学重要意义的12-芳基-8,9,10,12-四氢苯并[ a ]
黄嘌呤-11-one衍
生物均已高效合成,收率很高。本方法具有许多优点,例如反应时间短,后处理简单,产率高,成本低以及反应条件温和。此外,该催化剂可以简单地回收和再利用而不会明显损失其催化活性。