Highly ordered aluminium-planted mesoporous silica as active catalyst for Biginelli reaction and formyl C–H insertion reaction with diazoester

Abstract

Al-planted MCM-41s (Al-M41s) with regular mesoporous structure and Si/Al ratio of 23–32 were successfully prepared by the template-ion exchange method in which the template/Si molar ratio and Si/Al ratio were adjusted at 1.44 and 5–15, and showed much higher catalytic activity for the titled reactions than the other types of Al-M41s prepared by post-synthesis or sol–gel methods.