Synthesis of new functionalized chiral ionic liquid and its organocatalytic asymmetric epoxidation in water

被引:20
|
作者
Li, Jian [2 ]
Hu, Feng [2 ]
Xie, Xiao-Ke [2 ]
Liu, Feiyan [1 ]
Huang, Zhi-Zhen [2 ]
机构
[1] Zhejiang Univ, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China
[2] Nanjing Univ, Sch Chem & Chem Engn, Nanjing 210093, Peoples R China
基金
中国国家自然科学基金;
关键词
Functionalized chiral ionic liquid; Organocatalyst; Epoxidation; Water; Recycle; Green asymmetric synthesis; SULFUR YLIDES; CARBONYL-COMPOUNDS; SULFONIUM YLIDES; CATALYTIC CYCLE; ALDEHYDES; EPOXIDES; MECHANISM; SULFIDES; AZIRIDINATION; GENERATION;
D O I
10.1016/j.catcom.2009.10.014
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new sulfur-functionalized chiral ionic liquid has been developed for the epoxidation reaction of aromatic aldehydes with benzyl bromide in water, furnishing desired trans-epoxides with excellent diastereoselectivity and enantioselectivity up to 72% ee. The organocatalyst could be easily reused for five times without remarkable decrease in yields and enantioselectivities. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:276 / 279
页数:4
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