作者:Jaehong Lim、Siti Nurhanna Riduan、Su Seong Lee、Jackie Y. Ying
DOI:10.1002/adsc.200700388
日期:2008.6.9
Aza(bisoxazoline) was easily immobilized on siliceous mesocellular foam (MCF) in a systematic approach. It was found that silanol precapping, linker group flexibility, ligand loading, and silanol postcapping were important factors to consider in optimizing silica-supported aza(bisoxazoline) catalysts. The optimized MCF-supported aza(bisoxazoline)-copper catalyst offered the same enantioselectivity
氮杂(双恶唑啉)很容易以系统的方法固定在硅质介孔泡沫(MCF)上。发现硅烷醇的预封端,连接基团的柔性,配体的负载和硅烷醇的后封是优化二氧化硅负载的氮杂双(双恶唑啉)催化剂时要考虑的重要因素。优化的MCF负载的氮杂(双恶唑啉)-铜催化剂提供了与其均相对应物相同的对映选择性,并具有出色的可回收性。杂化的催化剂在短的反应时间内显示出更高的化学选择性。异质氮杂(双恶唑啉)-铜(I)催化剂已成功应用于具有优异生产率和对映选择性的循环流式填充床反应器。