Facile Ring-Opening of Oxiranes by H2O2 Catalyzed by Phosphomolybdic Acid
摘要:
At ambient temperature, in the presence of catalytic amounts of phosphomolybdic acid (PMA), ethereal hydrogen peroxide reacted readily with a range of epoxides, giving corresponding beta-hydroxyhydroperoxides in high yields.
Tin(IV) Chloride Promoted Reaction of Oxiranes with Hydrogen Peroxide
摘要:
A group of substituted oxiranes were readily transformed to the corresponding beta-hydroxyhydroperoxides (HHP) in good yields in ethereal SnCl4-H2O2 system in which SnCl4 acts as catalyst. Alternatively, treating oxiranes with SnCl4 first, followed by addition of ethereal H2O2 solution achieved primary gem-dihydroperoxides (DHP) in moderate yields. In the case of preparing DHP, SnCl4 first promoted the rearrangement of oxiranes to aldehydes, followed by condensation with hydrogen peroxide to provide DHP as final products.
Facile Ring-Opening of Oxiranes by H<sub>2</sub>O<sub>2</sub> Catalyzed by Phosphomolybdic Acid
作者:Yun Li、Hong-Dong Hao、Yikang Wu
DOI:10.1021/ol900811m
日期:2009.6.18
At ambient temperature, in the presence of catalytic amounts of phosphomolybdic acid (PMA), ethereal hydrogen peroxide reacted readily with a range of epoxides, giving corresponding beta-hydroxyhydroperoxides in high yields.
Tin(IV) Chloride Promoted Reaction of Oxiranes with Hydrogen Peroxide
作者:Chunhua Qiao、Xing Yan、Zhongwu Guo
DOI:10.1055/s-0032-1318213
日期:——
A group of substituted oxiranes were readily transformed to the corresponding beta-hydroxyhydroperoxides (HHP) in good yields in ethereal SnCl4-H2O2 system in which SnCl4 acts as catalyst. Alternatively, treating oxiranes with SnCl4 first, followed by addition of ethereal H2O2 solution achieved primary gem-dihydroperoxides (DHP) in moderate yields. In the case of preparing DHP, SnCl4 first promoted the rearrangement of oxiranes to aldehydes, followed by condensation with hydrogen peroxide to provide DHP as final products.