Polymer-supported PPh<sub>3</sub> as a reusable organocatalyst for the Mukaiyama aldol and Mannich reaction
作者:Satoru Matsukawa、Kazuki Fukazawa、Junya Kimura
DOI:10.1039/c4ra03394a
日期:——
An easily accessible and user-friendly polymer-supported phosphine PS-PPh3 catalyzes the aldol reaction of aldehydes and imines. A broad range of aldehydes and imines could be applied under mild conditions using 5–10 mol% PS-PPh3. PS-PPh3 was easily recovered and reused with minimal loss of activity.
The Mannich reaction of methylsilyl enol ether with arylaldimine proceeded in the presence of a catalytic amount of lithium chloride in dimethylformamide at room temperature. The reaction was mild enough to apply to aldimines having the AcO, TBDMSO, or MeS group. Microwave irradiation accelerated the reaction substantially to reduce reaction time.