Enantioselective Nucleophilic β-Carbon-Atom Amination of Enals: Carbene-Catalyzed Formal [3+2] Reactions
作者:Xingxing Wu、Bin Liu、Yuexia Zhang、Martin Jeret、Honglin Wang、Pengcheng Zheng、Song Yang、Bao-An Song、Yonggui Robin Chi
DOI:10.1002/anie.201606571
日期:2016.9.26
enantioselective β‐carbon amination for enals is disclosed. The nitrogen atom from a protected hydrazine with suitable electronic properties readily behaves as a nucleophile. Addition of the nitrogen nucleophile to a catalytically generated N‐heterocyclic‐carbene‐bound α,β‐unsaturated acyl azolium intermediate constructs a new carbon–nitrogen bond asymmetrically. The pyrazolidinone products from our catalytic
公开了对映体的对映体选择性β-碳胺化反应。来自具有适当电子性质的受保护肼的氮原子很容易表现出亲核试剂的作用。将氮亲核试剂加到催化生成的N-杂环-卡宾键合的α,β-不饱和酰基偶氮中间体上,可不对称地构建新的碳-氮键。从我们的催化反应的吡唑烷酮产品是生物活性分子共同支架,并且可以容易地转化为诸如β有用的化合物3 -氨基-酸衍生物。