Abstract
An organic polymer containing chiral(R)-(+)-1,1′-binaphthol[(R)-(+)-BINOL] building blocks(Polymer) has been prepared through Click reaction(Huisgen 1,3-dipolar cycloaddition) of(R)-(+)-6,6′-diethynyl-1,1′-binaphthol and 1,4-diazidobenzen in the presence of Copper(Ⅰ).The composition,structure and morphology of Polymer were characterized by Fourier transform infrared(FTIR) spectrometer,powder X-ray diffractometer(XRD) and scanning electron microscope(SEM).The Polymer was coordinated to titanium of Ti(OiPr)4 through chiral dihydroxy groups in(R)-(+)-BINOL to synthesize a new heterogeneous chiral metal catalyst(Polymer-Ti),which exhibited extremely high conversion and good enantioselectivity in asymmetric addition reaction of diethylzinc to multiple aromatic aldehydes.Also,Polymer-Ti catalyst displayed stable catalytic activities in multi-recycle of asymmetric addition reaction of diethylzinc to benzaldehyde.
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