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Novel Bifunctional Chiral Thiourea Catalyzed Highly Enantioselective aza-Henry Reaction.

  作者 Wang, Chungui;Zhou, Zhenghong;Tang, Chuchi;  
  选自 期刊  Organic Letters;  卷期  2008年10-9;  页码  1707-1710  
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[摘要]A novel bifunctional chiral thiourea organocatalyst bearing a glycosyl scaffold and a tertiary amino group was synthesized starting from readily available alpha-D-glucose. This thiourea was proven to be an effective organocatalyst for the asym. aza-Henry reaction between N-Boc imines and nitromethane. The corresponding adducts were obtained in good to excellent yields with excellent enantioselectivities (up to 99.8% ee). In addn., the reaction of nitroethane also proceeded smoothly with excellent enantioselectivity, albeit with low to good diastereoselectivities.

 
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