3-[(1R,2S,13S,14S,16R,17R,18S,20S)-1-fluoro-17-(fluoromethylsulfanylcarbonyl)-20-hydroxy-17-(2-methoxyacetyl)oxy-2,16,18-trimethyl-6,7-diazapentacyclo[11.7.0.02,10.04,8.014,18]icosa-4(8),5,9-trien-7-yl]benzoic acid 、
L-丙氨酰胺盐酸盐 在
2-(1H-benzo[d][1,2,3]triazol-1-yl)-1,1,3,3-tetramethylisouronium tetrafluoroborate
N,N-二异丙基乙胺 作用下,
以
N-甲基吡咯烷酮 为溶剂,
反应 1.0h,
以17%的产率得到(1R,2R,3aS,3bS,10aS,10bR,11S,12aS)-7-(3-{[(1S)-2-Amino-1-methyl-2-oxoethyl]carbamoyl}phenyl)-10b-fluoro-1-{[(fluoromethyl)sulfanyl]carbonyl}-11-hydroxy-2,10a,12a-trimethyl-1,2,3,3a,3b,4,5,7,10,10a,10b,11,12,12a-tetradecahydro-cyclopenta[5,6]naphtho[1,2-f]indazol-1-yl methoxyacetate