Practical Asymmetric Synthesis of β-Trichloromethyl-β-hydroxy Ketones by the Reaction of Chloral or Chloral Hydrate with Chiral Imines
作者:Kazumasa Funabiki、Norihiro Honma、Wataru Hashimoto、Masaki Matsui
DOI:10.1021/ol034461b
日期:2003.6.1
[reaction: see text] Chloral or its hydrate undergoes the carbon-carbon bond-formation reaction with various optically active imines in the absence of any additive, followed by hydrolysis, to produce the corresponding beta-trichloromethyl-beta-hydroxy ketones in good yields with high enantioselectivities. In addition, the products with higher ee values were obtained by a simple recrystallization process
[反应:见正文]在没有任何添加剂的情况下,氯或其水合物与各种旋光性亚胺发生碳-碳键形成反应,然后水解,以高收率生产相应的β-三氯甲基-β-羟基酮具有高对映选择性。另外,通过简单的重结晶过程获得具有较高ee值的产物。