Enantioselective Bromination of Silyl Enol Ethers with Chiral Pentacarboxycyclopentadienyl Bromide
作者:Pingfan Li、Guo Liu
DOI:10.1055/a-2088-9219
日期:2023.12
Chiral pentacarboxycyclopentadienyl bromide reagents were synthesized to accomplish enantioselective bromination of silylenolethers to give corresponding α-bromoketone products in good yields and up to 77% ee. A catalytic version of this reaction was also demonstrated through the combination of Lewis acid activators and diethyl 2,2-dibromomalonate as stoichiometric achiral bromine source.
合成了手性五羧基环戊二烯基溴化试剂,以实现甲硅烷基烯醇醚的对映选择性溴化,以良好的产率和高达 77% ee 得到相应的 α-溴酮产物。该反应的催化形式也通过路易斯酸活化剂和 2,2-二溴丙二酸二乙酯的组合作为化学计量的非手性溴源得到证明。