Photoredox Removal of<i>p</i>-Methoxybenzyl Ether Protecting Group with Hydrogen Peroxide as Terminal Oxidant
作者:Zheng Liu、Yi Zhang、Zheren Cai、Hao Sun、Xu Cheng
DOI:10.1002/adsc.201400936
日期:2015.2.9
AbstractWe report a mild protocol for removal of the p‐methoxybenzyl ether protecting group under acidic conditions with eosin Y combined with LEDs as a photoredox catalysis system and hydrogen peroxide as the terminal oxidant. This protocol is compatible with ethers derived from primary, secondary, and tertiary alcohols, as well as with various functional groups. The protocol showed unusual selectivity for a tertiary ether over a primary ether. The scale up to gram scale is also explored and identical reactivity is observed.magnified image