Visible Light Mediated Organophotoredox Catalyzed Synthesis of Tetraketones Using Tertiary Amines as Alkyl Synthons
作者:Shankhajit Mondal、Akanksha M. Pandey、Boopathy Gnanaprakasam
DOI:10.1021/acs.joc.3c02613
日期:2024.3.15
tetraketones using cyclic-1,3-diketones and tertiaryamines as alkyl synthons under 18 W blue LED have been accomplished. The condition is very mild that uses air as a green oxidant and avoids previously used harsh conditions like high temperature. Diverse arrays of tertiaryamines first undergo reductive quenching of excited photocatalysts to form iminium ions that upon subsequent attack by cyclic-1,3-diketones
在 18 W 蓝光 LED 下,使用环 1,3-二酮和叔胺作为烷基合成子,曙红 Y 催化合成具有生物活性的四酮。条件非常温和,使用空气作为绿色氧化剂,避免了以前使用的高温等恶劣条件。各种叔胺首先对激发的光催化剂进行还原猝灭,形成亚胺离子,随后受到环 1,3-二酮的攻击,产生四酮。该方法通过 31 个实例进行了验证,收率高达 76%。还通过重要的例子证明了在曙红 Y 催化剂存在下在太阳条件下该反应的可行性。