(R)-2-(((9H-fluoren-9-yl)-methoxy)carbonylamino)-2-(3,5-dichloro-4-hydroxyphenyl)acetic acid 、
methyl (2R)-2-[[(8R,11R,14S)-5-(3-acetamido-4-bromophenyl)-11-(3,5-dichloro-4-hydroxyphenyl)-4-hydroxy-13-methyl-8-[(2-methylpropan-2-yl)oxycarbonylamino]-9,12-dioxo-2-oxa-10,13-diazatricyclo[14.2.2.13,7]henicosa-1(18),3(21),4,6,16,19-hexaene-14-carbonyl]amino]-2-(4-hydroxyphenyl)acetate 在
盐酸 、
2,6-二甲基吡啶 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
1,4-二氧六环 、
四氢呋喃 、
二氯甲烷 为溶剂,
反应 4.0h,
以96%的产率得到methyl (2R)-2-[[(8R,11R,14S)-5-(3-acetamido-4-bromophenyl)-11-(3,5-dichloro-4-hydroxyphenyl)-8-[[(2R)-2-(3,5-dichloro-4-hydroxyphenyl)-2-(9H-fluoren-9-ylmethoxycarbonylamino)acetyl]amino]-4-hydroxy-13-methyl-9,12-dioxo-2-oxa-10,13-diazatricyclo[14.2.2.13,7]henicosa-1(18),3(21),4,6,16,19-hexaene-14-carbonyl]amino]-2-(4-hydroxyphenyl)acetate