Divergent Reactivity of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones: Photocatalytic Synthesis of 3-Substituted Isoindolinones Achieved through a Nitrogen-Mediated Hydrogen Atom Shift
作者:Fostino R. B. Bokosi、Oisin J. Shiels、Christopher Richardson、Adam J. Trevitt、Sinead T. Keaveney
DOI:10.1021/acs.joc.3c02545
日期:2024.2.2
regioselective visible-light-mediated denitrogenative alkene insertion of 1,2,3-benzotriazin-4(3H)-ones was developed to access 3-substituted isoindolinones, an important structural motif present in many biologically active molecules and natural products. Notably, divergent reactivity was achieved by switching from reported nickel catalysis (where C3-substituted 3,4-dihydroisoquinolin-1(2H)-ones form) to
开发了一种区域选择性可见光介导的 1,2,3-苯并三嗪-4(3 H )-酮的脱氮烯烃插入,以获取 3-取代异吲哚啉酮,这是许多生物活性分子和天然产物中存在的重要结构基序。值得注意的是,通过从报道的镍催化(其中形成 C3 取代的 3,4-二氢异喹啉-1(2 H )-酮)转向光催化,实现了不同的反应性,其中光催化脱氮和随后的氮介导的氢原子转移导致排他性3-取代异吲哚啉酮形成。所开发的光催化反应与活化的末端烯烃和环状α,β-不饱和酯和酮相容,对1,2,3-苯并三嗪-4(3 H )-酮的N-取代具有广泛的官能团耐受性。该过程的实用性通过克级合成和合成后酰胺化得以凸显。为了了解这种独特的产物选择性的起源,进行了实验和计算机制研究。