di-tert-butyl 12,12'-(disulfanediylbis(methylene))(6R,6'R,15R,15'R)-bis(6-(tert-butoxycarbonyl)-15-isopropyl-2,2-dimethyl-4,10,13-trioxo-3-oxa-5,9,14-triazahexadecan-16-oate) 在
苯甲醚 、
三氟乙酸 作用下,
反应 0.5h,
以98%的产率得到(R)-2-{3-((R)-3-Amino-3-carboxy-propylcarbamoyl)-2-[3-((R)-3-amino-3-carboxy-propylcarbamoyl)-2-((R)-1-carboxy-2-methyl-propylcarbamoyl)-propyldisulfanylmethyl]-propionylamino}-3-methyl-butyric acid