Diversification of Unprotected Alicyclic Amines by C−H Bond Functionalization: Decarboxylative Alkylation of Transient Imines
作者:Anirudra Paul、Jae Hyun Kim、Scott D. Daniel、Daniel Seidel
DOI:10.1002/anie.202011641
日期:2021.1.18
efforts by many practitioners in the field, methods for the direct α‐C−H bond functionalization of unprotected alicyclic amines remain rare. A new advance in this area utilizes N‐lithiated alicyclic amines. These readily accessible intermediates are converted to transient imines through the action of a simple ketone oxidant, followed by alkylation with a β‐ketoacid under mild conditions to provide valuable
尽管该领域的许多从业者做出了广泛的努力,但未受保护的脂环胺直接 α-C-H 键功能化的方法仍然很少。该领域的一项新进展是利用 N-锂化脂环胺。这些易于获得的中间体通过简单的酮氧化剂的作用转化为瞬时亚胺,然后在温和条件下用β-酮酸进行烷基化,以前所未有的轻松方式提供有价值的β-氨基酮。具有现有 α-取代基的底物可实现区域选择性 α'-烷基化。该方法还适用于通过加入SN Ar步骤方便地一锅合成多环二氢喹诺酮类药物。