三氟甲烷磺酸甲酯 、 [(2S,3R,4S,5R,6R)-2-[[(3aS,4R,6R,7R,7aS)-6-methyl-4-phenylsulfanyl-2-sulfanylidene-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-7-yl]oxy]-6-methyl-5-phenylmethoxy-3-phenylsulfanyloxan-4-yl] acetate 、
[(2S,3R,4S,5R,6R)-5-[(2S,3R,4S,5R,6R)-4-[(2S,5S,6S)-5-hydroxy-6-methyloxan-2-yl]oxy-6-methyl-5-phenylmethoxy-3-phenylsulfanyloxan-2-yl]oxy-2-(4-methoxyphenoxy)-6-methyl-3-phenylsulfanyloxan-4-yl] methylsulfanylformate 在
2,6-二叔丁基-4-甲基吡啶 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
以15%的产率得到Thiocarbonic acid O-[(2R,3R,4S,5R,6S)-3-((2S,3R,4S,5S,6R)-5-benzyloxy-4-hydroxy-6-methyl-3-phenylsulfanyl-tetrahydro-pyran-2-yloxy)-6-(4-methoxy-phenoxy)-2-methyl-5-phenylsulfanyl-tetrahydro-pyran-4-yl] ester S-methyl ester