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