18-hydroxy-14-tert-butoxycarbonylamino-4-cyclopropylsulfonylaminocarbony-2,15-dioxol-3,16-diaza-12-oxatricyclo[14.3.0.04,6]-nonadec-7-ene 、
环己基异氰酸酯 以
甲苯 为溶剂,
反应 12.0h,
以25%的产率得到18-(cyclohexylaminocarbonyloxy)-14-tert-butoxycarbonylamino-4-cyclopropylsulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-10-oxatricyclo-[14.3.0.04,6]-nonadec-7-ene