Synthesis of 2,3,4-trisubstituted thiochromanes using an organocatalytic enantioselective tandem Michael-Henry reaction

被引:110
|
作者
Dodda, Rajasekhar [1 ]
Goldman, Joshua J. [1 ]
Mandal, Tanmay [1 ]
Zhao, Cong-Gui [1 ]
Broker, Grant A. [1 ]
Tiekink, Edward R. T. [1 ]
机构
[1] Univ Texas San Antonio, Dept Chem, San Antonio, TX 78249 USA
关键词
Henry reaction; 2-mercaptobenzaldehyde; Michael addition; beta-nitrostyrene; organocatalysis; tandem reaction;
D O I
10.1002/adsc.200700331
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Enantioenriched 2,3,4-trisubstituted thiochromanes have been synthesized by using a cupreine-catalyzed tandem Michael addition-Henry reaction between 2-mercaptobenzaldehydes and beta-nitrostyrenes. Good diastereoselectivities and enantioselectivities were obtained for the title compounds, which may be further improved through a single recrystallization (up to 98% de and > 99% ee).
引用
收藏
页码:537 / 541
页数:5
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