Subject Area物理化学
Large-pore mesoprous ethane-silicas as efficient heterogeneous asymmetric catalysts
Jiang DM(蒋冬梅); Gao JS(高金索); Yang QH(杨启华); Li C(李灿)
Conference Name15th international zeolite conference
Conference Date2007-8-12
Conference Place中国
Funding Organization吉林大学
AbstractLarge-pore mesoporous ethane-silicas with trans-(1R,2R)-diaminocyclohexane protruding in the channel were synthesized by one-step condensation of 1,2-bis(trimethoxysilyl)ethane and N-[(triethoxysilyl)propyl]-(-)-(1R,2R)-diaminocyclohexane in acidic medium using P123 as template. Mesoporous materials are used as catalysts for the asymmetric transfer hydrogenation (ATH) of acetophenone after complexing [Rh(cod)Cl]2. The catalyst with SBA-15 type mesostructure exhibits higher activity, compared to the catalyst with MCM-41 type mesostructuer.The post-decoration of tran-(1R,2R)-diaminocyclohexane in the pore of SBA-15 type mesoporous material was further demonstrated by reacting with p-toluenesulfonyl chloride. The modified material (complexed with [RuCl2(p-cymene)]2 gives an enanced 66% ee (R) for the ATH of acetophenone under air atmosphere in HCOONa-H2O, while only 2% ee (S) is observed on the original material under identical reaction condition.
Document Type会议论文
Corresponding AuthorYang QH(杨启华); Li C(李灿)
Recommended Citation
GB/T 7714
Jiang DM,Gao JS,Yang QH,et al. Large-pore mesoprous ethane-silicas as efficient heterogeneous asymmetric catalysts[C],2007:43/1.
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