4-甲氧基氯苄 、 在
sodium hydride 、
四丁基碘化铵 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.08h,
以93%的产率得到[(3aR,3'aS,4R,6'S,7R,7'R,7aS,7'aR)-6'-[(2S,3S,4S,5R,6R)-5-[(2S,3R,4S,5S,6R)-4-[(2S,3S,4S,5R,6R)-4-hydroxy-5-[(4-methoxyphenyl)methoxy]-4,6-dimethyl-3-phenylmethoxyoxan-2-yl]oxy-5-methoxy-6-methyl-3-phenylmethoxyoxan-2-yl]oxy-3-methoxy-6-(methoxymethyl)-4-phenylmethoxyoxan-2-yl]oxy-7'-phenylmethoxyspiro[3a,6,7,7a-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4,2'-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran]-7-yl] 2-methyl-4,6-bis(phenylmethoxy)benzoate