methyl (S)-3-(4-hydroxybenzoylamino)-2-(4-methanesulphonylpiperazin-1-yl)propanoate 、
tert-butyl((4-chlorobut-2-yn-1-yl)oxy)dimethylsilane 以510 mg (88%) of methyl (S)-3-{4-[4-(tert-butyldimethylsilanyloxy)but-2-ynyloxy]benzoyl-amino}-2-(4-methanesulphonylpiperazin-1-yl)propanoate are obtained in the form of a colourless oil的产率得到methyl (S)-3-{4-[4-(tert-butyldimethylsilanyloxy)but-2-ynyloxy]benzoylamino}-2-(4-methanesulphonyl-piperazin-1-yl)propanoate