(2,5-dioxopyrrolidin-1-yl)methyl 2-bromoacetate 、 (S)-2-amino-3-methyl butyric acid 2-(1-(hydroxymethyl)-2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione ester 以
二氯甲烷 为溶剂,
以54%的产率得到(S)-2-(bromoacetamido)-3-methyl-butyric acid 2-(1-(hydroxymethyl)-2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione ester