Copper-Catalyzed, N-Directed Distal C(sp<sup>3</sup>)–H Functionalization toward Azepanes
作者:Jia-Wen Yang、Guang-Qiang Tan、Kai-Cheng Liang、Ke-Dong Xu、Ma Su、Feng Liu
DOI:10.1021/acs.orglett.2c03135
日期:2022.10.28
synthesis of structurally diverse alkene/alkyne-containing azepanes. The reaction features selective functionalization of distal unactivated C(sp3)–H bonds and a broad substrate scope, thus allowing the late-stage modification of pharmaceuticals and natural products. A radical mechanism involving 1,5-hydrogen atom transfer of N-radicals, facile coupling of alkyl radicals with 1,3-dienes/1,3-enynes, and
我们在此报道了铜催化的N-氟磺酰胺和 1,3-二烯/1,3-烯炔的正式 [5 + 2] 氮杂环化反应,用于合成结构多样的含烯烃/炔烃的氮杂环庚烷。该反应具有选择性功能化远端未活化的 C(sp 3 )–H 键和广泛的底物范围,从而允许对药物和天然产物进行后期修饰。提出了一种涉及 N-自由基的 1,5-氢原子转移、烷基自由基与 1,3-二烯/1,3-烯炔的轻松偶联以及通过 C-N 键形成构建氮杂环庚烷基序的自由基机制。