An efficient and benign method for the regio- and stereoselective synthesis of halohydrins and β-halo ethers from dihydropyrans, dihydrofurans and anhydro sugars in the presence of a halide salt and hydrogen peroxide is presented with tungstate-exchanged takovite as oxidation catalyst.
Photo-induced Alkoxybromination of Olefins by<i>N</i>,<i>N</i>′-Dibromo-2,5-piperazinedione
作者:Akira Sera、Hiroshi Yamada、Kuniaki Itoh
DOI:10.1246/bcsj.53.219
日期:1980.1
Irradiation of N,N′-dibronio-2,5-piperazinedione in dichloromethane in the presence of an alcohol induced alkoxybromination of cyclohexene to give trans-1-bromo-2-alkoxycyclohexane in a good yield. The reaction was thought to proceed through an ionic mechanism.