Synthesis, characterization and catalytic performance in enantioselective reactions by mesoporous silica materials functionalized with chiral thiourea-amine ligand
作者:Yaşar Gök、Halil Zeki Gök
DOI:10.1007/s11164-020-04301-w
日期:2021.2
and (1S, 2S)-1,2-diphenylethane-1,2-diamine were successively immobilized on SBA-15 mesoporous support. Chiral heterogeneous catalysts and their homogenous counterparts were tested in enantioselective transfer hydrogenation of aromatic ketones and enantioselective Michael addition of acetylacetone to β-nitroolefin derivatives. The catalysts demonstrated notably high catalytic conversions (up to 99%)
通过在(SBA-15)介孔载体上接枝(1 R,2 R)-或(1 S,2 S)-1,2-二苯乙烷-1,2-二胺的甲硅烷基衍生物合成了手性多相催化剂。介孔材料SBA-15和如此制备的手性多相催化剂的特征在于结合了多种不同的技术,例如X射线衍射(XRD),傅立叶变换红外(FT-IR),热重分析(TGA),场发射扫描电子显微镜(FESEM)和Brunauer–Emmett–Teller(BET)表面积。结果表明(1 R,2 R)-和(1 S,2 S)-1,2-二苯乙烷-1,2-二胺被依次固定在SBA-15介孔载体上。在芳族酮的对映选择性转移氢化反应和乙酰丙酮对β-硝基烯烃衍生物的对映选择性迈克尔加成反应中,对手性多相催化剂及其均相催化剂进行了测试。催化剂表现出显着的高催化转化率(高达99%)和适度的对映体过量(ee高达30%))用于非均相对映选择性转移氢化。对映选择性迈克尔反应的催化性能显示出优异