Enantioselective addition of diethylzinc to aldehydes using immobilized chiral BINOL-Ti complex on ordered mesoporous silicas

被引：39

作者：

Pathak, Kavita ^{[1
]}

Bhatt, Achyut P. ^{[1
]}

Abdi, Sayed H. R. ^{[1
]}

Kureshy, Rukhsana I. ^{[1
]}

Khan, Noor-ul H. ^{[1
]}

Ahmad, Irshad ^{[1
]}

Jasra, Raksh V. ^{[1
]}

机构：

[1] Cent Salt & Marine Chem Res Inst, Silicates & Catalysis Discipline, Bhavnagar 364002, Gujarat, India

来源：

TETRAHEDRON-ASYMMETRY | 2006年 / 17卷 / 10期

关键词：

D O I：

10.1016/j.tetasy.2006.05.017

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A chiral (S)-BINOL ligand has been covalently grafted on ordered mesoporous silicas-MCM-41 and SBA-15 and the resulting inorganic-organic hybrid materials used as chiral auxiliaries in Ti-promoted enantio selective addition of diethyl zinc to aldehydes under heterogeneous conditions. These heterogeneous catalysts showed promising activity and enantioselectivity. The catalyst having a larger pore diameter with capping of free silanol moiety with trimethylsilyl (TMS) group was found to be more active with enantio-selectivities up to 81% being achieved. The catalyst worked well up to three cycles with retention of enantioselectivity after washing with 10% HCl in methanol. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1506 / 1513

页数：8

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