Iron-Promoted Oxidative Alkylation/Cyclization of Ynones with 4-Alkyl-1,4-dihydropyridines: Access to 2-Alkylated Indenones
作者:Fang-Ting Xiong、Bin-Hong He、Yu Liu、Quan Zhou、Jian-Hong Fan
DOI:10.1021/acs.joc.2c00766
日期:2022.7.1
An iron-promoted oxidative tandem alkylation/cyclization of ynones with 4-alkyl-substituted 1,4-dihydropyridines for the efficient synthesis of 2-alkylated indenones is described. The process occurs via oxidative homolysis of a C–C σ-bond in 1,4-dihydropyridines to generate an alkyl radical followed by the addition of C–C triple bonds in ynones and intramolecular cyclization. A wide range of alkyl
描述了一种铁促进的氧化串联烷基化/环化 4-烷基取代的 1,4-二氢吡啶,用于有效合成 2-烷基化茚酮。该过程通过1,4-二氢吡啶中的 C-C σ-键的氧化均裂产生烷基自由基,然后在 ynone 中添加 C-C 三键和分子内环化。广泛的烷基自由基可以有效地转移以生成一系列合成有用的 2-烷基化茚酮,在温和条件下具有优异的选择性。