Highly Enantioselective Synthesis of γ-Nitro Heteroaromatic Ketones in a Doubly Stereocontrolled Manner Catalyzed by Bifunctional Thiourea Catalysts Based on Dehydroabietic Amine: A Doubly Stereocontrolled Approach to Pyrrolidine Carboxylic Acids
作者:Xianxing Jiang、Yifu Zhang、Albert S. C. Chan、Rui Wang
DOI:10.1021/ol8025268
日期:2009.1.1
class of dehydroabietic amine-substituted primary amine-thiourea bifunctional catalysts were designed and synthesized. The doubly stereocontrolled organocatalytic conjugate addition of a variety of heterocycles-bearing ketones to nitroalkenes was investigated for the first time, affording (S)- or (R)-γ-nitro heteroaromatic ketones with excellent enantioselectivities (up to ee >99%). Furthermore, the nearly
设计并合成了一类新型的脱氢松香胺取代的伯胺-硫脲双功能催化剂。首次研究了将多种带有杂环的酮加到硝基烯烃中的双立体控制有机催化共轭加成反应,从而提供了具有出色对映选择性(高达ee> 99%)的(S)-或(R)-γ-硝基杂芳族酮。此外,几乎光学纯的γ-硝基杂芳族酮可以容易地转化为手性吡咯烷羧酸。