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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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纳米磁性固体酸SO42-/Zr(OH)4-Fe3O4催化水相不对称Aldol反应
DOI: 10.1016/S1872-2067(14)60222-9, PP. 425-431
Keywords: 固体酸催化剂,磁性,Aldol反应,不对称催化,水相
Abstract:
？以纳米磁性材料Fe3O4,ZrOCl2·8H2O和硫酸为原料,在不同焙烧温度下制备了纳米磁性固体酸催化剂SO42-/Zr(OH)4-Fe3O4.详细表征了该磁性固体酸的SO42-负载量、酸分布、表面形貌和孔结构等特性.在含有硝基和氰基强吸电子基苯甲醛的不对称水相Aldol反应中,SO42-/Zr(OH)4-Fe3O4表现出优良的催化性能(83%-100%收率,86.0%-95.6%eeanti和anti/syn=88-96/12-4).该类磁性固体酸可在外加磁体作用下定量地从催化反应体系中分离并回收使用,重复使用5次未见显著失活.
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