Tetrahedron

Preparation and Application of Polymer-Grafted Ti–BINOL Complexes as Chiral Catalysts in the Enantioselective Addition of Diethylzinc to Aldehydes

X Yang, W Su, D Liu, H Wang, J Shen, C Da, R Wang…

文献索引：Yang, Xiaowu; Su, Wu; Liu, Daxue; Wang, Hengshan; Shen, Jianheng; Da, Chaoshan; Wang, Rui; Chan, Albert S.C. Tetrahedron, 2000 , vol. 56, # 22 p. 3511 - 3516

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被引用次数: 56

摘要

Enantiomeric BINOL has been anchored to aminomethylated polystyrene resin at the 3-and 3, 3′-positions of BINOL respectively. The resulting functionalized polymers 4 and 7 have been used as chiral ligands in the Ti-catalytic enantioselective addition of diethylzinc to aldehydes. Compared with the homogeneous ligands 5 and 8 in the same reaction, the polymer-supported ligands 4 and 6 gave, in some cases, higher enantioselectivity. The ...