(3aR,3'aS,4R,6'S,7R,7'R,7aS,7'aR)-6'-[(2S,3S,4R,5R,6R)-5-[tert-butyl(dimethyl)silyl]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-ol 、
2-Methyl-4,6-bis(phenylmethoxy)benzoyl fluoride 在
2-Methyl-4,6-bis(phenylmethoxy)benzoyl fluoride 作用下,
以87的产率得到(2R,3aS,3a'R,6S,7R,7aR,7'R,7a'S)-7-(benzyloxy)-6-(((2S,3S,4S,5R,6R)-4-(benzyloxy)-5-hydroxy-3-methoxy-6-(methoxymethyl)tetrahydro-2H-pyran-2-yl)oxy)octahydro-4H-2,4'-spirobi[[1,3]dioxolo[4,5-c]pyran]-7'-yl 2,4-bis(benzyloxy)-6-methylbenzoate