Optical pure α, γ-disubstituted γ-butyrolactones were obtained with excellent results through double asymmetric hydrogenation of (E)-2-methyl-4-oxo-2-alkenoic acids utilizing Rh/JosiPhos catalytic system.
利用Rh/JosiPhos催化体系对( E )-2-甲基-4-氧代-2-链烯酸进行双不对称氢化,获得了光学纯的α,γ-二取代
γ-丁内酯,并取得了优异的效果。