(2R,3R,4S,5R,6R)-2-[(1R)-1-amino-2-methylpropyl]-6-methylsulfanyloxane-3,4,5-triol 、
4-butoxypyridine-2-carboxylic acid 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 2.0h,
以91%的产率得到4-butoxy-N-((R)-2-methyl-1-((2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(methylthio)tetrahydro-2H-pyran-2-yl)propyl)picolinamide