[(1S,4R,7S,9R)-9-[(1S,4R,7S,9R)-4-(acetyloxymethyl)-16-(benzenesulfonyl)-4-hydroxy-5-methyl-3,6-dioxo-7-sulfanyl-2,5,16-triazatetracyclo[7.7.0.02,7.010,15]hexadeca-10,12,14-trien-9-yl]-16-(benzenesulfonyl)-4-hydroxy-5-methyl-3,6-dioxo-7-sulfanyl-2,5,16-triazatetracyclo[7.7.0.02,7.010,15]hexadeca-10,12,14-trien-4-yl]methyl acetate 、
异丁酰氯 在
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 0.75h,
以445 mg的产率得到[(1S,4R,7S,9R)-4-(acetyloxymethyl)-9-[(1S,4R,7S,9R)-4-(acetyloxymethyl)-16-(benzenesulfonyl)-5-methyl-4-(2-methylpropanoyloxy)-7-(2-methylpropanoylsulfanyl)-3,6-dioxo-2,5,16-triazatetracyclo[7.7.0.02,7.010,15]hexadeca-10,12,14-trien-9-yl]-16-(benzenesulfonyl)-5-methyl-7-(2-methylpropanoylsulfanyl)-3,6-dioxo-2,5,16-triazatetracyclo[7.7.0.02,7.010,15]hexadeca-10,12,14-trien-4-yl] 2-methylpropanoate