Iodine‐Promoted Domino Oxidative Cyclization for the One‐Pot Synthesis of Novel Fused Four‐Ring Quinoxaline Fluorophores by sp
<sup>3</sup>
C−H Functionalization
作者:Yong Zhang、Min Yang、Chengli Jia、Min Ji
DOI:10.1002/chem.201903688
日期:2019.10.28
A method for the synthesis of novel fused four-ring quinoxaline skeleton has been described by an I2 promoted sp3 C-H functionalization between 1,2,3,3-tetramethyl-3H-indolium iodides and 1,2-diamines. This transformation proceeds smoothly under metal- and peroxide-free conditions through a sequential iodination, oxidation, annulation and rearrangement. Moreover, 8,9-dichloro-5,12,12-trimethyl-2-(trifluoromethyl)-5
1,2,3,3-四甲基-3H-碘化碘与1,2-二胺之间的I2促进的sp3 CH官能化描述了一种合成新型稠合四环喹喔啉骨架的方法。通过连续的碘化,氧化,成环和重排,该转变在无金属和无过氧化物的条件下顺利进行。此外,8,9-二氯-5,12,12-三甲基-2-(三氟甲基)-5,12-二氢喹啉[2,3-b]喹喔啉显示出良好的光物理性质,并用于活细胞成像,表明了其潜在的应用前景。此骨架的值作为探针中的荧光团。