18-Hydroxy-14-tert-butoxycarbonylamino-4-cyclopropylsulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-12-oxatricyclo[14.3.0.04,6]-nonadec-7-ene → 18-(2-Carbonylethoxyphenylaminocarbonyloxy)-14-tert-butoxycarbonylamino-4-cyclopropylsulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-12-oxatricyclo-[14.3.0.04,6]-nonadec-7-ene

Beteiligte Stoffe

Reaktionsschritte

Prepared by way of method III using 18-hydroxy-14-tert-butoxycarbonylamino-4-cyclopropylsulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-12-oxatricyclo[14.3.0.04,6]-nonadec-7-ene (100 mg, 0.175 mmol) and 2-carbonylethoxyphenyl isocyanate (102 mg, 0.53 mmol). The final trituration (diethyl ether/hexane) and filtration gave 18 mg (14%) of 18-(2-carbonylethoxyphenylaminocarbonyloxy)-14-tert-butoxycarbonylamino-4-cyclopropylsulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-12-oxatricyclo-[14.3.0.04,6]-nonadec-7-ene as a white powder: 98.9% pure (HPLC), MS m/z 758 (M−H)−, HRMS: calcd. 760.3228 and found 760.3226 (M+NH4)+, mp 148-150° C.

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