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研究了聚SalenD Ti(Ⅳ )配合物对芳香醛不对称硅腈化反应的催化作用 .考察了催化剂用量、溶剂和温度对苯甲醛不对称硅腈化反应的影响 ,在 - 40℃和 1 0mol催化剂量下 ,以 4 Cl C6 H4 CHO为底物 ,获得了ee值为 82 %和收率为 98%的加成产物 .探讨了聚SalenD Ti(Ⅳ )上取代基对芳香醛硅腈化反应产物光学异构体选择性的影响 .在 2 0℃下 ,催化剂可重复使用多次而反应活性和对映体选择性保持不变
The catalytic effect of poly-SalenD Ti (Ⅳ) complexes on the asymmetric silylonitrile conversion of aromatic aldehydes was investigated. The effect of catalyst amount, solvent and temperature on the asymmetric silylonitrile reaction of benzaldehyde was investigated. Under the catalytic amount of 4Cl C6H4 CHO as substrate, the product of addition with ee value of 82% and yield of 98% was obtained. The effects of the substituents on poly-SalenD Ti (Ⅳ) Product Optical Isomer Selectivity. At 20 ° C, the catalyst can be reused many times while the reactivity and enantioselectivity remain unchanged