L-苹果酸 、
N,N',N''-[2,4,6-boroxintriyltris[[(1R)-3-methylbutylidene]imino(2-oxo-2,1-ethanediyl)]]tris(2,5-dichlorobenzamide) 以
乙酸乙酯 为溶剂,
以to yield {(4S)-2-[(1R)-1-({[(2,5-dichlorobenzoyl)amino]-acetyl}amino)-3-methylbutyl]-5-oxo-1,3,2-dioxaborolan-4-yl}acetic acid as a white solid (0.307 g, 96%)的产率得到((4S)-2-((1R)-1-((((2,5-dichlorobenzoyl)amino)acetyl)amino)-3-methylbutyl)-5-oxo-1,3,2-dioxaborolan-4-yl)acetic acid