Copper-Catalyzed Aerobic CC Bond Cleavage of Lactols with N-Hydroxy Phthalimide for Synthesis of Lactones
作者:Ya Lin Tnay、Shunsuke Chiba
DOI:10.1002/asia.201403196
日期:2015.4
The transformation of cyclichemiacetals (lactols) into lactones has been achieved by Cu‐catalyzed aerobic CC bond cleavage in the presence of N‐hydroxy phthalimide (NHPI). The present process is composed of a multistep sequence including a) formation of exo‐cyclic enol ethers by dehydration; b) addition of phthalimide N‐oxyl radical to the enol ethers followed by trapping of the resulting C‐radicals