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。