(2S,3S,4S,5R)-3,4,5-Tris-(4-methyl-benzoyloxy)-6-methylsulfanyl-tetrahydro-pyran-2-carboxylic acid methyl ester 、 (2S,4aR,6S,7R,8S,8aR)-7-Benzyloxy-6-[(2R,3S,4S,5R,6S)-3,5-bis-benzyloxy-2-benzyloxymethyl-6-((3R,4S,5R,6R)-4,5,6-tris-benzyloxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-4-yloxy]-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-ol 在
四丁基溴化铵 、
silver trifluoromethanesulfonate 、
copper(ll) bromide 作用下,
以
二氯甲烷 为溶剂,
以80%的产率得到