Unmodified Nano-Powder Magnetite Catalyzes a Four- Component Aza-Sakurai Reaction
作者:Ricardo Martínez、Diego J. Ramón、Miguel Yus
DOI:10.1002/adsc.200800089
日期:2008.6.9
for an old material: magnetite is an excellent Lewis acid catalyst for the four-component aza-Sakuraireaction. The process could be repeated up to 15-times without losing effectiveness, with the catalyst recycling being as easy as the use of a simple magnet. The catalyst is selective and could discriminate between aldehyde and ketone functionalities, catalyzing first the reaction with the higher electrophilic