Formal Nitrene Insertion into the β-Vinyl C–H Bond of Acroleins: Synthesis of Enaminals
作者:Dongsheng Zhang、Huatao Zheng、Lei Zeng、Yi Nie、Yingzhu Fan、Weidong Rao、Lizhu Gao
DOI:10.1021/acs.orglett.2c04028
日期:2023.1.13
nitrene insertion reaction into the β-vinyl C–H bond of acroleins with an electron-rich organic azide was developed. The reaction protocol can produce secondary enaminals in high yield with a broad substrate scope. In the reaction, acid mediated [3 + 2] cycloaddition of organic azides with an acrolein generated intermediate protonated triazolines, which were selectively decomposed into enaminals with
开发了一种有效的形式氮烯插入丙烯醛的 β-乙烯基 C-H 键与富电子有机叠氮化物的反应。该反应方案可以产生具有广泛底物范围的高产率次级烯胺。在反应中,酸介导的有机叠氮化物与丙烯醛的 [3 + 2] 环加成生成中间体质子化三唑啉,通过加入弱布朗斯台德碱性试剂(例如甲醇)将其选择性地分解成烯胺醛。在温和的氢化条件下,生成的仲烯醛很容易还原成 γ-氨基醇。