3,4,6-tetra-O-acetyl-2-O-(2,4,6-tri-O-acetyl-3-O-carbamoyl-α-D-mannopyranosyl)-α-L-gulopyranosyl benzyl 2-(2-ethoxy)ethylcarbamate 、
potassium carbonate 在
甲醇 、
乙腈 、
三氟乙酸 作用下,
以
甲醇 、
水 为溶剂,
反应 2.75h,
以After lyophilization of the appropriate fractions, compound 33 was obtained as a white powder的产率得到(2R,3S,4S,5R,6R)-2-((2R,3S,4S,5S,6S)-2-(2-(2-benzyloxycarbonylaminoethoxy)ethoxy)-4,5-dihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-3-yloxy)-3,5-dihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-4-yl carbamate