2-甲氧基丙烯 、 (2R,4R,5R,6R)-6-((S)-1,2-Dihydroxy-ethyl)-4,5-dihydroxy-2-((2R,3S,4R,5R,6S)-3,4,6-tris-benzyloxy-5-benzyloxycarbonylamino-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-2-carboxylic acid methyl ester 以80%的产率得到(2R,4R,5R,6S)-6-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-4,5-dihydroxy-2-((2R,3S,4R,5R,6S)-3,4,6-tris-benzyloxy-5-benzyloxycarbonylamino-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-2-carboxylic acid methyl ester