Highly Enantioselective Michael Addition of Nitroalkanes to Enones and Its Application in Syntheses of (R)-Baclofen and (R)-Phenibut
作者:Feng Sha、Xin-Yan Wu、Xing-Tao Guo、Jie Shen
DOI:10.1055/s-0034-1380203
日期:——
enantioselectivities. A highly enantioselective Michael addition of nitroalkanes to α,β-unsaturated ketones was developed. In the presence of a chiral primary amine–thiourea catalyst based on dehydroabietic amine, γ-nitro ketones were obtained with excellent enantioselectivities (up to 99% ee) and in up to 96% yield. This protocol was successfully applied in asymmetric syntheses of (R)-baclofen and (R)-phenibut
摘要 开发了对α,β-不饱和酮的硝基烷烃的高对映选择性迈克尔加成反应。在基于脱氢松香胺的手性伯胺-硫脲催化剂的存在下,可获得具有出色的对映选择性(高达99%ee)和高达96%收率的γ-硝基酮。该方案已成功用于(R)-baclofen和(R)-pheni的不对称合成中,但收率高且对映选择性优异。 开发了对α,β-不饱和酮的硝基烷烃的高对映选择性迈克尔加成反应。在基于脱氢松香胺的手性伯胺-硫脲催化剂的存在下,可获得具有出色的对映选择性(高达99%ee)和高达96%收率的γ-硝基酮。该方案已成功用于(R)-baclofen和(R)-pheni的不对称合成中,但收率高且对映选择性优异。