A Photochemical Entry to Depsides: Synthesis of Gustastatin
作者:Jorge García-Fortanet、John R. Debergh、Jef K. De Brabander
DOI:10.1021/ol047507p
日期:2005.2.1
Herein, we propose a modular and general strategy to construct orcinol-type depsides based on the photolysis of functionalized benzodioxinones (I). Notably, resorcinylic esters are obtained without competing isocoumarin (II) formation, exemplified by the first total synthesis of gustastatin in 10 steps from commercially available trihydroxybenzoic acid. [Structure: see text]
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。
Selivanov, B. A.; Bil'kis, I. I.; Varand, V. L., Journal of Organic Chemistry USSR (English Translation), 1985, vol. 21, # 5, p. 865 - 877
作者:Selivanov, B. A.、Bil'kis, I. I.、Varand, V. L.、Shteingarts, V. D.
DOI:——
日期:——
An efficient acceptor of 1-hydroxy(or alkoxy)alkyl radicals – ketene dithioacetal S,S-dioxide –