、 在
N-甲基吗啉 、
4-二甲氨基吡啶 、
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以63%的产率得到methyl (1R,2R,4S)-7-[(1R,2R,4S)-7-[(1R,2R,4S)-7-[(1R,2R,4S)-7-[(1R,2R,4S)-7-[(1R,2R,4S)-7-[(2-methylpropan-2-yl)oxycarbonyl]-7-azabicyclo[2.2.1]heptane-2-carbothioyl]-7-azabicyclo[2.2.1]heptane-2-carbonyl]-7-azabicyclo[2.2.1]heptane-2-carbothioyl]-7-azabicyclo[2.2.1]heptane-2-carbothioyl]-7-azabicyclo[2.2.1]heptane-2-carbothioyl]-7-azabicyclo[2.2.1]heptane-2-carboxylate