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dc.contributor.authorShe, Jiarong
dc.contributor.authorYe, Linmin
dc.contributor.authorZhu, Jing
dc.contributor.authorYuan, Youzhu
dc.contributor.author袁友珠
dc.date.accessioned2011-06-03T00:23:26Z
dc.date.available2011-06-03T00:23:26Z
dc.date.issued2007
dc.identifier.citationCATALYSIS LETTERS,2007,116(1-2):70-75zh_CN
dc.identifier.issn1011-372X
dc.identifier.urihttp://dx.doi.org/doi:10.1007/s10562-007-9094-9
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9349
dc.description.abstractAsymmetric hydrogenation of dimethyl itaconate by the chiral rhodium complex ligated with water-soluble sulfonated (R)-2,2 '-bis(diphenylphosphino)-1,1 '-binaphthyl (labeled as (R)-BINAPS) was performed in ionic liquid-isopropanol biphasic catalytic system. A moderate enantiomeric excess (ee) of 64% and initial turnover frequency (TOFmax) as high as 1234 h(-1) could be obtained at 303 K and 2.0 MPa when the molar ration of substrate to rhodium was set at 1000. Application of imidazolium ionic liquid [bmim]BF4 (bmim = 1-butyl-3-methyl imidazolium cation) made it possible to reuse the catalyst several times, showing rather good stability in the catalyst performance. According to the ICP-OES analyses, the total extraction of rhodium species by the reactants from the ionic liquid phase was about 3.24 wt% after the catalyst for four runs, which was about three times lower than that of total loss of phosphorous species. The slight decreases in the ee value and TOFmax during the catalyst reuse could be recovered essentially to the pristine levels by replenishing certain amount of the fresh ligand into the used catalyst.zh_CN
dc.language.isoenzh_CN
dc.publisherSPRINGERzh_CN
dc.subjectrhodiumzh_CN
dc.subjectionic liquidzh_CN
dc.subjectbiphasic catalysiszh_CN
dc.subjectwater-soluble complexzh_CN
dc.subjectenantioselective hydrogenationzh_CN
dc.titleCatalytic performance of chiral rhodium complex with water-soluble sulfonated (R)-2,2 '-bis(diphenylphosphino)-1,1 '-binaphthyl for enantioseletive hydrogenation in ionic liquid biphasic systemzh_CN
dc.typeArticlezh_CN


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