Catalytic Enantioselective Protonation of α-Oxygenated Ester Enolates Prepared through Phospha-Brook Rearrangement

被引:119
|
作者
Hayashi, Masashi [1 ]
Nakamura, Shuichi [1 ]
机构
[1] Nagoya Inst Technol, Dept Frontier Mat, Grad Sch Engn, Showa Ku, Nagoya, Aichi 4668555, Japan
关键词
enantioselectivity; enolates; organocatalysis; phospha-Brook rearrangement; protonation; ASYMMETRIC HYDROPHOSPHONYLATION; HYDROXY PHOSPHONATES; ACID; DERIVATIVES; KETONES; DECARBOXYLATION; ALDEHYDES; EFFICIENT; AMINO;
D O I
10.1002/anie.201007568
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
(Chemical Equation Presented) Phosphonates go chiral: The organocatalytic enantioselective reaction of α-ketoesters with phosphites using cinchona alkaloids and Na2CO3 has afforded α-phosphonyloxy esters with high enantioselectivities (see scheme). This process allows the formation of both enantiomers of the product. A catalyst loading of as low as 2 mol% does not result in a significant decrease of the enantioselectivity. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA.
引用
收藏
页码:2249 / 2252
页数:4
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