Abstract
New insoluble chiral catalysts were prepared from a self-assembly of Ti(O- i-Pr) 4 and non-cross-linked copolymers with ( R)-binaphthol (BINOL) pendant groups. In the presence of one of the chiral catalysts, an enantioselective carbonyl-ene reaction proceeded at room temperature to give an adduct in 85% yield with 88% ee. This insoluble assembled catalyst was easily prepared and reusable.
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