Dibenzyl 6-deoxy-2,3,4-tri-O-benzyl-β-L-galactopyranosyl phosphite 、 6-((2R,4aR,6R,7R,8R,8aS)-7-Acetylamino-8-hydroxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yloxy)-hexanoic acid methyl ester 在
4 A molecular sieve 、 silver perchlorate 、 zinc(II) chloride 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以73%的产率得到6-[(2R,4aR,6R,7R,8R,8aS)-7-Acetylamino-2-phenyl-8-((2S,3S,4R,5R,6S)-3,4,5-tris-benzyloxy-6-methyl-tetrahydro-pyran-2-yloxy)-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yloxy]-hexanoic acid methyl ester