在
2,6-二甲基吡啶 、
三甲基溴硅烷 、
氟化氢吡啶 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以54%的产率得到(1S,2R,18R,19R,22S,25R,28R,40S)-2-[(2R,4S,5R,6S)-4-amino-5-hydroxy-4,6-dimethyloxan-2-yl]oxy-22-(2-amino-2-oxoethyl)-5,15-dichloro-48-[(2S,3R,4S,5S,6R)-3-[(2S,4S,5R,6S)-4-[[4-(4-chlorophenyl)phenyl]methylamino]-5-hydroxy-4,6-dimethyloxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-19-[[(2R)-2-[4,4-diphosphonobutanoyloxymethoxycarbonyl(methyl)amino]-4-methylpentanoyl]amino]-18,32,35,37-tetrahydroxy-20,23,26,42,44-pentaoxo-7,13-dioxa-21,24,27,41,43-pentazaoctacyclo[26.14.2.23,6.214,17.18,12.129,33.010,25.034,39]pentaconta-3,5,8,10,12(48),14,16,29(45),30,32,34(39),35,37,46,49-pentadecaene-40-carboxylic acid