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时间:2020-03-26
《手性胺修饰的羟基磷灰石负载RuCl_2(TPP)_3催化不对称氢化苯乙酮.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学报(WuliHuaxueXuebao)OctoberActaPhys.一Chim.Sin.,2010,26(]0):2711-271827ll[Article]www.whxb.pku.edu.cn手性胺修饰的羟基磷灰石负载RuC12(TPP)3催化不对称氢化苯乙酮张定林,杨朝芬孙亚萍付海燕1李瑞祥陈华,李贤均(四川大学化学学院,有机金属络合催化研究所,绿色化学与技术教育部重点实验室,成都610064。第三军医大学药学院化学教研室,重庆400038)摘要:采用共沉淀法制备了手性胺脯氨酸、D一脯氨酸、(IR,2R
2、)一l,2一二苯基乙二胺二磺酸钠((1,2R)一DPENDS)、(1S,2s)一1,2一二苯基乙二胺二磺酸钠((1,2S)一DPENDS))修饰的羟基磷灰石(HAP).并采用傅里叶变换红~F(vr—IR)光谱,扫描电子显微镜(SEM),X射线衍射(XRD)和比表面积测定(BET)等仪器分析手段对其进行表征.以手性胺修饰的羟基磷灰石做载体负载RuC1(TPP)催化苯乙酮不对称加氢反应,详细考察温度、压力、碱的浓度、手性胺负载量等条件对催化反应的影响.在氢气压力为5.0MPa、30oC条件下反应4h,苯乙酮的不对称加氢反应,
3、可获得99.9%转化率和77.8%对映选择性,其结果优于对应的均相催化反应.实验结果证明,催化反应在载体表面完成,催化剂通过简单离心分离可循环使用.关键词:手性胺;羟基磷灰石;RuC1。(TPP)。;苯乙酮;多相不对称加氢中图分类号:0643;O641;0433AsymmetricHydrogenationofAcetophen0neCatalyzedbyRuCIz(TPP)3SupportedonHydr0xyapatiteModifiedwithChiralAmineZHANGDing—Lin'YANGChao—Fe
4、nSUNYa—PingFUHai—YanLIRui·XiangCHENHua’LIXian—Jun(KeyLaboratoryofGreenChemistryandTechnology,MinistryofEducation,InstituteofHomogeneousCatalysis,CollegeofChemistry,SichuanUniversity,Chengdu610064,P.R.China;2DepartmentofChemistry,SchoolofPharmacy,TheThirdMilitaryM
5、edicalUniversity,Chongqing400038,P.R.China)Abstract:Chiralamine(L—proline,D—proline,(1R,2R)一1,2一diphenyl一1,2一ethylenediaminesulfonatedisodium((1R,2R)一DPENDS)and(1s,2S)一1,2-diphenyl一1,2-ethylenediaminesulfonatedisodium((1,2S)一DPENDS))modifiedhydroxyapatite(HAP)wer
6、epreparedandcharacterizedbyFouriertransforminfrared(FT—IR)spectrometry,scanningelectronmicroscopy(SEM),X—raydifraction(XRD),andBrunauer-Emmett-Teller03ET)surfaceareaanalysis.RuC12c]rPfwassupportedon(1R,2R)-DPENDSmodifiedHAPfortheasymmetrichydrogenationofacetophen
7、one.Adetailedinvestigationabouttheeffectsoftemperature,amountofalkali,H,pressure.andconcentrationofDPENDSmodifiedHAPontheactivityandenantioselectivityofacetophenonehydrogenationwasundertaken.Undertheoptimumreactionconditionsof30oC,p(H2)=5.0MPa,reactiontimeof4h,th
8、econversionandenantioselectivityreached99.9%and77.8%enantiomericexcess(ee),respectively.Theresultsindicatedthattheasymmetrichydrogenationwasaccomplishedonthesu
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