Facile Synthesis of a New Chiral BINOL–Silica Hybrid Catalyst for Asymmetric Diels–Alder and Aza Michael Reactions
作者:Hamid Saeidian、Hossein Paghandeh、Zahra Parvin、Zohreh Mirjafary、Mohammad Ghaffarzadeh
DOI:10.1007/s10562-018-2346-z
日期:2018.5
A novel chiral BINOL–silica hybrid has been successfully prepared by the reaction of (S)-BINOL and SiCl4 following by gel polymerization under atmosphere condition. The synthesized catalyst was characterized by elemental analysis, Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. Catalytic activity of the chiral BINOL–silica
通过 (S)-BINOL 和 SiCl4 在大气条件下进行凝胶聚合反应,成功制备了一种新型手性 BINOL-二氧化硅杂化物。通过元素分析、傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和能量色散X射线光谱对合成的催化剂进行了表征。已经研究了手性 BINOL-二氧化硅杂化物对非对映选择性和对映选择性 Diels-Alder 和 aza Michael 反应的催化活性。温和的反应条件、高产率、出色的非对映体和对映体过量使这种强大而有效的催化剂成为合成手性有机化合物的有吸引力的选择。