(3-trifluoroacetamidopropyl)-2-acetamido-4,6-O-benzylidene-2-deoxy-α-D-galactopyranoside 、 Acetic acid (2R,3S,4R,5R,6R)-2-acetoxymethyl-6-bromo-3-((2S,3R,4S,5S,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-5-(2,2,2-trichloro-ethoxycarbonylamino)-tetrahydro-pyran-4-yl ester 在
silver trifluoromethanesulfonate 、
1,1,3,3-四甲基脲 作用下,
以84%的产率得到