(2S,3R)-1-(tert-butoxycarbonyl)-2-methylpyrrolidine-3-carboxylic acid 、 (2S)-2-cyclopentyl-N-((6
3S,4S)-1
1-ethyl-1
2-(2-((S)-1-methoxyethyl)pyridin-3-yl)-10,10-dimethyl-5,7-dioxo-6
1,6
2,6
3,6
4,6
5,6
6-hexahydro-1
1H-8-oxa-1(5,3)-indola-6(1,3)-pyridazina-2(1,3)-benzenacycloundecaphane-4-yl)-2-(methylamino)acetamide 在
N,N-二异丙基乙胺 、
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
乙腈 为溶剂,
以79 %的产率得到tert-butyl (2S,3R)-3-(((1S)-1-cyclopentyl-2-(((6
3S,4S)-1
1-ethyl-1
2-(2-((S)-1-methoxyethyl)pyridin-3-yl)-10,10-dimethyl-5,7-dioxo-6
1,6
2,6
3,6
4,6
5,6
6-hexahydro-1
1H-8-oxa-1(5,3)-indola-6(1,3)-pyridazina-2(1,3)-benzenacycloundecaphane-4-yl)amino)-2-oxoethyl)(methyl)carbamoyl)-2-methylpyrrolidine-1-carboxylate