(R)-[3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-phenyl]-{(S)-2-[(2R,3R)-2-tert-butoxycarbonylamino-3-(tert-butyl-dimethyl-silanyloxy)-3-(4-fluoro-3-nitro-phenyl)-propionylamino]-3-cyano-propionylamino}-acetic acid tert-butyl ester 在
四丁基氟化铵 、
potassium carbonate 、
calcium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 15.0h,
生成 (8R,11S,14R,15R)-14-tert-Butoxycarbonylamino-11-cyanomethyl-5,15-dihydroxy-4-methoxy-19-nitro-10,13-dioxo-2-oxa-9,12-diaza-tricyclo[14.2.2.1
3,7]henicosa-1(19),3,5,7(21),16(20),17-hexaene-8-carboxylic acid tert-butyl ester