methyl (2S)-4-[bis(4-methoxyphenyl)methylamino]-2-[[(2R,3R)-3-[tert-butyl(dimethyl)silyl]oxy-3-(4-hydroxyphenyl)-2-[[(2R)-4-methyl-2-[methyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]pentanoyl]amino]propanoyl]amino]-4-oxobutanoate 在
磺酰氯 作用下,
以
乙醚 为溶剂,
以75%的产率得到(S)-N-[Bis-(4-methoxy-phenyl)-methyl]-2-[(2R,3R)-2-[(R)-2-(tert-butoxycarbonyl-methyl-amino)-4-methyl-pentanoylamino]-3-(tert-butyl-dimethyl-silanyloxy)-3-(3-chloro-4-hydroxy-phenyl)-propionylamino]-succinamic acid methyl ester