Retro‐
<i>Corey‐Chaykovsky</i>
Epoxidation: Converting Geminal Disubstituted Epoxides to Ketones
作者:Siqi Li、Pingfan Li、Jiaxi Xu
DOI:10.1002/hlca.201900164
日期:2019.9
epoxidation has been widely applied in the conversion of aldehydes and ketones to epoxides with sulfonium and sulfoxonium ylides. The reverse transformation is realized for conversion of geminal disubstituted epoxides to ketones in the presence of DABCO in refluxing mesitylene. The method is a weak basic transformation fromepoxides to ketones with loss of a methylene group and can be applied as an
Cu-Catalyzed hydrophosphorylative ring opening of propargyl epoxides: highly selective access to 4-phosphoryl 2,3-allenols
作者:Ruwei Shen、Jianlin Yang、Haipeng Zhao、Yu Feng、Lixiong Zhang、Li-Biao Han
DOI:10.1039/c6cc05428e
日期:——
A novel CuI-catalyzed cross-couplings of propargyl epoxides with P(O)H compounds is disclosed. The reaction proceeded efficiently under mild conditions to give 4-phosphoryl 2,3-allenolderivatives in good to high yields with...