DICP OpenIR
学科主题物理化学
Chirally Functionalized Mesoporous Organosilicas for Chiral Separation and Asymmetric Catalysis
Yang QH(杨启华)
会议名称The 13th Asian Chemical Congress
会议日期2009-9-13
2009-09-13
会议地点中国
页码66/1
部门归属五室
主办者中国化学会主办,中科院上海有机化学研究所
英文摘要Chiral PMOs (with chiral functionality in the framework) opens up a new avenue for the synthesis of chiral material and may exhibit promising application potentials in the fields of chiral separation and asymmetric catalysis. Recently, we have synthesized spherical (1R,2R)-diaminocyclohexane (DACH) functionalized chiral PMOs and employed as a novel kind of chiral stationary phase for high performance liquid chromatography (HPLC) [1,2]. Several (1R,2R)-diaminocyclohexane and L-tartardiamide functionalized mesoporous organosilicas for asymmetric catalysis have been synthesized and show good to moderate enantioselectivity in transfer hydrogenation of ketones [3-5] and asymmetric epoxidation [6], respectively. Recently, the chiral PMOs with (R)-Binol and (R)-Binap integrated in the mesoporous framework were synthesized using a successive co-condensation and post-synthesis modification method [7]. The catalytic results show that the TOF (43 h-1) of nanospheres with (R)-Binol in the network are much higher than that (1 h-1) of the bulk material in Ti-promoted asymmetric addition of diethylzinc to benzaldehyde. The highest enantioselectivity of 94% could be obtained on the nanospheres for benzaldehyde. Moreover, the chiral PMOs with (R)-Binap in the pore wall (coordination with [RuCl2-(benzene)]2) is an efficient solid catalyst for the asymmetric hydrogenation of β-keto esters with ee as high as 99%, which is among the highest ever reported for the chirally functionalized PMOs in asymmetric catalysis. In summary, the chirally functionalized PMOs with the combination of the rigid nanoporous structure and homogeneously distributed chiral ligands in the pore wall may be potential chiral solids for chiral separation and asymmetric catalysis.
语种中文
文献类型会议论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/113548
专题中国科学院大连化学物理研究所
通讯作者Yang QH(杨启华)
推荐引用方式
GB/T 7714
Yang QH. Chirally Functionalized Mesoporous Organosilicas for Chiral Separation and Asymmetric Catalysis[C],2009:66/1.
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