(2S,4R)-1-N-(tert-butoxycarbonyl)-4-n-pentylpyrrolidine-2-carboxylic acid 、
[(2R,3S,4S,5R,6R)-3,5-diacetyloxy-2-[(1S)-1-amino-2,2-difluoropropyl]-6-methylsulfanyloxan-4-yl] acetate 在
二乙基异丙基胺 、
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以57%的产率得到(2R,3S,4S,5R,6R)-2-((S)-1-((2S,4R)-1-(tert-butoxycarbonyl)-4-pentylpyrrolidine-2-carboxamido)-2,2-difluoropropyl)-6-(methylthio)tetrahydro-2H-pyran-3,4,5-triyl triacetate