An Ion-Pair Immobilization Strategy in Rhodium-Catalyzed Asymmetric Transfer Hydrogenation of Aromatic Ketones

作者：Xu, Yulong; Cheng, Tanyu; Long, Jie; Liu, Ketang; Qian, Qingqian; Gao, Fei; Liu, Guohua^*; Li, Hexing

来源：Advanced Synthesis & Catalysis, 2012, 354(17): 3250-3258.

DOI：10.1002/adsc.201200320

• asymmetric transfer hydrogenation
• heterogeneous catalysis
• mesoporous materials
• silica
• supported catalysts

A chiral diamine-based homogeneous cationic rhodium catalyst was developed and two heterogeneous cationic rhodium catalysts were obtained via the encapsulation of the homogeneous cationic rhodium catalyst within Me-SBA-15 and Me-SBA-16. All these catalysts presented excellent catalytic activities and high enantioselectivities in ultrasound-promoted asymmetric transfer hydrogenation of aromatic ketones and represent a successful use of the ion-pair immobilization strategy. More importantly, the encapsulation of the cationic rhodium functionality within Me-SBA-16 had an obvious high recyclability, in which the recycled catalyst could be reused nine times without significantly affecting its enantioselectivity, showing good potential in industrial application.

• 出版日期2012-11
• 单位上海师范大学