3-[(2R,3S,5R,6S)-3-[(4-methoxyphenyl)methoxy]-5-phenylmethoxy-6-(phenylmethoxymethyl)oxan-2-yl]propanoic acid 、
[(2R,4aR,6S,7R,8aS)-6-[2,2-bis(phenylsulfanyl)ethyl]-2-(4-methoxyphenyl)-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl] 3-[(2R,3S,5R,6S)-6-[2,2-bis(phenylsulfanyl)ethyl]-5-hydroxy-3-[(4-methoxyphenyl)methoxy]oxan-2-yl]propanoate 在
4-二甲氨基吡啶 、 camphor-10-sulfonic acid 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
反应 17.5h,
以94%的产率得到[(2R,4aR,6S,7R,8aS)-6-[2,2-bis(phenylsulfanyl)ethyl]-2-(4-methoxyphenyl)-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl] 3-[(2R,3S,5R,6S)-6-[2,2-bis(phenylsulfanyl)ethyl]-3-[(4-methoxyphenyl)methoxy]-5-[3-[(2R,3S,5R,6S)-3-[(4-methoxyphenyl)methoxy]-5-phenylmethoxy-6-(phenylmethoxymethyl)oxan-2-yl]propanoyloxy]oxan-2-yl]propanoate