Enantioselective Synthesis of Dialkylated α-Hydroxy Carboxylic Acids through Asymmetric Phase-Transfer Catalysis

被引:32
|
作者
Duan, Shaobo [1 ]
Li, Sanliang [1 ]
Ye, Xinyi [2 ]
Du, Nuan-Nuan [1 ]
Tan, Choon-Hong [1 ,2 ]
Jiang, Zhiyong [1 ]
机构
[1] Henan Univ, Key Lab Nat Med & Immunoengn Henan Prov, Kaifeng 475004, Henan, Peoples R China
[2] Nanyang Technol Univ, Div Chem & Biol Chem, Singapore 637371, Singapore
来源
JOURNAL OF ORGANIC CHEMISTRY | 2015年 / 80卷 / 15期
关键词
STEREOSELECTIVE-SYNTHESIS; MICHAEL ADDITION; MANNICH REACTIONS; GLYCOLIC ACID; 5H-OXAZOL-4-ONES; DERIVATIVES; ESTERS; HYDROLYZES; KETONES;
D O I
10.1021/acs.joc.5b01081
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
In the presence of an L-tert-leucine-derived urea ammonium salt as phase-transfer catalyst, a highly enantioselective alkylation of 5H-oxazol-4-ones with various benzyl bromides and allylic bromides has been developed to furnish catalytic asymmetric synthesis of biologically important dialkylated a-hydroxy carboxylic acids with a broad scope. This is the first example of an L-amino acid-derived urea ammonium salt being used as a phase-transfer catalyst with excellent catalytic efficiency.
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页码:7770 / 7778
页数:9
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