Combined Photoredox and Lewis Acid Catalyzed α-Hydroxyalkylation of Cyclic Ethers with Aromatic Ketones
作者:Melissa Reckenthäler、Jörg-M. Neudörfl、Elif Zorlu、Axel G. Griesbeck
DOI:10.1021/acs.joc.6b01085
日期:2016.8.19
The photochemically induced coupling of aromatic ketones with cyclic ethers such as tetrahydrofuran, tetrahydropyran, and 1,4-dioxane was studied. Direct photolysis of the substrates with UV-A light centered at 350 nm does not lead to photoinduced hydrogen transfer whereas the addition of a mixture of the Lewis acid catalysts Ti(OiPr)4 and BF3 enables the formation of the hydroxyalkylation products
研究了芳族酮与环醚(如四氢呋喃,四氢吡喃和1,4-二恶烷)的光化学诱导偶联。用居中于350 nm的UV-A光直接对底物进行光解不会导致光诱导的氢转移,而添加路易斯酸催化剂Ti(O i Pr)4和BF 3的混合物能够形成羟烷基化产物。