Chemoselective Oxidation of <i>p</i>-Methoxybenzyl Ethers by an Electronically Tuned Nitroxyl Radical Catalyst
作者:Shohei Hamada、Koichi Sugimoto、Elghareeb E. Elboray、Takeo Kawabata、Takumi Furuta
DOI:10.1021/acs.orglett.0c01839
日期:2020.7.17
The oxidation of p-methoxy benzyl (PMB) ethers was achieved using nitroxyl radical catalyst 1, which contains electron-withdrawing ester groups adjacent to the nitroxyl group. The oxidative deprotection of the PMB moieties on the hydroxy groups was observed upon treatment of 1 with 1 equiv of the co-oxidant phenyl iodonium bis(trifluoroacetate) (PIFA). The corresponding carbonyl compounds were obtained
对硝基甲氧基苄基(PMB)醚的氧化是使用硝酰自由基催化剂1实现的,该催化剂含有与硝酰氧基相邻的吸电子酯基。在用1当量的共氧化剂苯基碘代双(三氟乙酸酯)(PIFA)处理1时,观察到PMB部分在羟基上的氧化脱保护。通过用1和过量的PIFA处理PMB保护的醇获得相应的羰基化合物。