{3,5-Bis-benzyloxy-2-[(4R,5R,6R)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-6-(tert-butyl-dimethyl-silanyloxymethyl)-5,6-dihydro-4H-pyran-2-yl]-phenyl}-methanol 在
二甲基二环氧乙烷 作用下,
以
二氯甲烷 、
丙酮 为溶剂,
生成 (3S,3'R,4'R,5'R,6'R)-4',5'-bis[[tert-butyl(dimethyl)silyl]oxy]-6'-[[tert-butyl(dimethyl)silyl]oxymethyl]-4,6-bis(phenylmethoxy)spiro[1H-2-benzofuran-3,2'-oxane]-3'-ol 、 (3R,3'R,4'R,5'R,6'R)-4',5'-bis[[tert-butyl(dimethyl)silyl]oxy]-6'-[[tert-butyl(dimethyl)silyl]oxymethyl]-4,6-bis(phenylmethoxy)spiro[1H-2-benzofuran-3,2'-oxane]-3'-ol