A palladium-catalyzed intermolecular γ-arylation of γ-branched α,β-unsaturated aldehydes has been developed. The reaction allows congested quaternary centers to be forged on a remote position from the carbonyl group, affording a variety of products in high yield and with consistently high stereoselectivity using very low catalyst loadings. The synthetic utility of the products has been highlighted by a series of derivatizations and the potential of the method to be extended to remote ε-functionalization has been demonstrated.
我们开发了一种
钯催化δ-支链δ±,δ²-不饱和醛的分子间δ-芳香化反应。该反应允许在离羰基较远的位置锻造拥挤的季中心,从而以极低的催化剂负载量获得高产率和持续高立体选择性的多种产品。通过一系列衍生化反应,产品的合成效用得到了突显,该方法扩展到远程δ-官能化的潜力也得到了证实。