Organophotoredox-catalyzed stereoselective reductive dimerization of chromone-2-carboxylic esters
作者:Arijit De、Tanaya Manna、Subhas Chandra Debnath、Syed Masood Husain
DOI:10.1039/d3nj05659g
日期:——
The irradiation of chromone-2-carboxylic esters with a blue LED in the presence of Rose Bengal and triethanolamine (TEOA) is used to obtain 2,2′-bichromanone of methyl, ethyl, n-propyl, iso-propyl, n-butyl, n-pentyl, and n-hexyl chromone-2-carboxylic esters in 52–93% yield and drtrans : cis up to 83 : 17. The key role played by Rose Bengal, TEOA, and blue light was established through numerous control
在孟加拉玫瑰和三乙醇胺 (TEOA) 存在下,用蓝色 LED 照射色酮-2-羧酸酯,得到甲基、乙基、正丙基、异丙基、正丁基的 2,2'-双色满酮、正戊基和正己基色酮-2-羧酸酯,产率 52–93%,反式 : 顺式博士高达 83:17。通过大量控制确定了玫瑰红、TEOA 和蓝光所发挥的关键作用实验并讨论了合理的机制。