methyl (2S)-2-[[4-[(2,4-diaminopteridin-6-yl)methyl-formylamino]benzoyl]amino]-5-(5,6-dichloro-1,3-dioxoisoindol-2-yl)pentanoate 在
sodium hydroxide 、
二甲基亚砜 作用下,
反应 0.08h,
以67%的产率得到2-[[(4S)-4-carboxy-4-[[4-[(2,4-diaminopteridin-6-yl)methylamino]benzoyl]amino]butyl]carbamoyl]-4,5-dichlorobenzoic acid