Electron transfer promoted photochemical reductive radical cyclization reactions of allyl 2-bromoaryl ethers
作者:Yasuharu Yoshimi、Hirotomo Kanai、Keisuke Nishikawa、Yasushi Ohta、Yoshiki Okita、Kousuke Maeda、Toshio Morita
DOI:10.1016/j.tetlet.2013.02.103
日期:2013.5
Tin-free, photoinduced electron transfer promoted reductive radical cyclization reactions of allyl 2-bromoaryl ethers in the presence of NaOH in 2-PrOH were found to take place efficiently to give 3-methyl-2,3-dihydrobenzofurans. In contrast to conventional radical cyclization reactions that employ AIBN/Bu3SnH in benzene, the new method utilizes NaOH and 2-PrOH that are both readily available and benign
发现在2-PrOH中的NaOH存在下,无锡,光诱导的电子转移促进的烯丙基2-溴芳基醚的还原自由基环化反应有效地产生了3-甲基-2,3-二氢苯并呋喃。与在苯中使用AIBN / Bu 3 SnH的常规自由基环化反应相反,该新方法利用了既容易获得又良性的NaOH和2-PrOH。因此,新开发的光化学方法是进行芳基自由基环化反应的一种通用且环保的方法。