[2+2] Cycloaddition of 1,3-Dienes by Visible Light Photocatalysis
作者:Anna E. Hurtley、Zhan Lu、Tehshik P. Yoon
DOI:10.1002/anie.201405359
日期:2014.8.18
[2+2] Photocycloadditions of 1,3‐dienes represent a powerful yet synthetically underutilized class of reactions. We report that visiblelight absorbing transition metal complexes enable the [2+2] cycloaddition of a diverse range of 1,3‐dienes. The ability to use long‐wavelength visiblelight is attractive because these reaction conditions tolerate the presence of sensitive functional groups that might
Combining Visible-Light-Photoredox and Lewis Acid Catalysis for the Synthesis of Indolizino[1,2-<i>b</i>]quinolin-9(11<i>H</i>)-ones and Irinotecan Precursor
achieved by combining visible-light-photoredox and Lewis acid catalysis for an intramolecular Povarov cycloaddition reaction under mild conditions. In this catalytic process, the visible-light-promoted dehydrogenation protocol of tetrahydroquinolines constitutes the key procedure. Moreover, this method can be applied to the formal synthesis of the precursor of irinotecan, which exhibited good anticancer
通过结合可见光-光氧化还原和路易斯酸催化在温和条件下的分子内Povarov环加成反应,实现了一步取代吲哚并[1,2 - b ]喹啉-9(11 H)-的构建。在该催化过程中,四氢喹啉的可见光促进的脱氢方案构成了关键程序。而且,该方法可以应用于具有良好抗癌活性的伊立替康前体的正式合成。