Iron-Catalyzed Oxidative Direct α-C–H Bond Functionalization of Cyclic Ethers: Selective C–O Bond Formation in the Presence of a Labile Aldehyde Group
作者:Balaji D. Barve、Yang-Chang Wu、Mohamed El-Shazly、Michal Korinek、Yuan-Bin Cheng、Jeh-Jeng Wang、Fang-Rong Chang
DOI:10.1021/ol5004115
日期:2014.4.4
Iron catalyzed oxidative coupling of salicylaldehydes with cydic ethers proceeded through the direct a-C H functionalization of ethers, forming the corresponding acetals in moderate to excellent yields. This is the first example of iron catalyzed selective C-O bond formation in the presence of a sensitive aldehyde moiety.
Copper-catalyzed selective C_O bond formation by oxidative α-C(sp3)_H/O_H coupling between ethers and salicylaldehydes
作者:Balaji D. Barve、Yang-Chang Wu、Mohamed El-Shazly、Michal Korinek、Yuan-Bin Cheng、Jeh-Jeng Wang、Fang-Rong Chang
DOI:10.1016/j.tet.2015.02.035
日期:2015.4
Copper-catalyzedoxidativecoupling of ethers and salicylaldehydes, via the direct α-C(sp3)–H bond functionalization of ethers in the presence tert-butyl hydroperoxide as an oxidant has been explored. The corresponding acetals were selectively formed in moderate to excellent yields. The sensitive formyl group of salicylaldehydes remained intact despite the oxidative reaction conditions.