Highly Diastereoselective Hydrogenation of Furan-2-carboxylic Acid Derivatives on Heterogeneous Catalysts
作者:Armin Börner、Klaus Jähnisch、Michael Sebek、Jens Holz
DOI:10.1055/s-0028-1087532
日期:2009.2
The heterogeneously catalyzed diastereoselective hydrogenation of furan-2-carboxylic acid derivatives modified with chiral auxiliaries is described. Chiral auxiliaries, catalysts, solvents, and additives were optimized for the reaction. Finally, the hydrogenation of furan-2-yl-[(S)-2-(hydroxydiphenylmethyl)-pyrrolidin-1-yl]-methanone resulted in a high diastereoselectivity. Removal of the auxiliary gave the tetrahydrofuran-2-carboxylic acid in 95% ee.
描述了使用手性辅佐剂修饰的呋喃-2-羧酸衍生物的异构体选择性氢化反应,该反应由异质催化剂进行。对反应中的手性辅佐剂、催化剂、溶剂和添加剂进行了优化。最终,呋喃-2-基-[(S)-2-(羟基二苯甲基)-吡咯烷-1-基]-甲酮的氢化反应获得了高的异构选择性。去除辅佐剂后,得到的四氢呋喃-2-羧酸的对映体过量达到了95%。