Role of <i>Ortho</i>-Substituents on Rhodium-Catalyzed Asymmetric Synthesis of β-Lactones by Intramolecular C–H Insertions of Aryldiazoacetates
作者:Liangbing Fu、Hengbin Wang、Huw M. L. Davies
DOI:10.1021/ol5011505
日期:2014.6.6
A rhodium-catalyzed asymmetric synthesis of β-lactones via intramolecular C–H insertion into the ester group of aryldiazoacetates has been developed. The β-lactones were synthesized in high yields and with high levels of diastereo- and enantioselectivity. Halo and trifluoromethyl substituents at the ortho position of the aryldiazoacetates enhance intramolecular C–H insertions over intermolecular reactions
已经开发了铑催化的不对称合成,其通过分子内CH–H插入芳基重氮乙酸酯的酯基中来实现。β-内酯以高收率和高水平的非对映选择性和对映选择性合成。芳基重氮乙酸酯邻位的卤代和三氟甲基取代基比分子间反应增强分子内C–H的插入,甚至允许C–H甚至甲基C–H键的插入。