2,3,4,6-tetra-O-acetyl-D-galactopyranosyl trichloroacetimidate 、
(2S,3S,4R,6E)-2-<(R)-2-Benzoyloxytetracosanoylamino>-3,4-dibenzoyloxy-17-methyl-6-octadecen-1-ol 在
4 A molecular sieve 、
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
以74%的产率得到1-O-(2,3,4,6-Tetra-O-acetoxy-β-D-galactopyranosyloxy)-(2S,3S,4R,6E)-2-<(R)-2-benzoyloxytetracosanoylamino>-3,4-dibenzoyloxy-17-methyl-6-octadecene