3-[(tetraethylbisphosphonomethyl)carbamoyl]propanoic acid 、 21-O-(4-bromobutanoyl)-1',4-didehydro-1-deoxy-1,4-dihydro-5'-(2-methylpropyl)-1-oxorifamycin XIV 在
caesium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 21-O-(4-((3-(bis(diethylphosphono)methyl)carbamoyl)propanoyloxy)butanoyl)-1',4-didehydro-1-deoxy-1,4-dihydro-5'-(2-methylpropyl)-1-oxorifamycin XIV