(2R)-2-[[2-(3,5-dichloro-4-hydroxyphenyl)-2-oxoacetyl]amino]-3-[6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indol-3-yl]propanoic acid 、
methyl (2R)-2-[[(8R,11R,14S)-8-[[(2R)-2-amino-2-(3,5-dichloro-4-hydroxyphenyl)acetyl]amino]-11-(3,5-dichloro-4-hydroxyphenyl)-4-hydroxy-5-iodo-13-methyl-9,12-dioxo-2-oxa-10,13-diazatricyclo[14.2.2.13,7]henicosa-1(18),3,5,7(21),16,19-hexaene-14-carbonyl]amino]-2-(4-hydroxyphenyl)acetate 在
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
四氢呋喃 为溶剂,
反应 4.0h,
以85%的产率得到methyl (2R)-2-[[(8R,11R,14S)-11-(3,5-dichloro-4-hydroxyphenyl)-8-[[(2R)-2-(3,5-dichloro-4-hydroxyphenyl)-2-[[(2R)-2-[[2-(3,5-dichloro-4-hydroxyphenyl)-2-oxoacetyl]amino]-3-[6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indol-3-yl]propanoyl]amino]acetyl]amino]-4-hydroxy-5-iodo-13-methyl-9,12-dioxo-2-oxa-10,13-diazatricyclo[14.2.2.13,7]henicosa-1(18),3,5,7(21),16,19-hexaene-14-carbonyl]amino]-2-(4-hydroxyphenyl)acetate