3,6-二-O-苯甲酰-D-葡萄烯糖 、
(2R,3R,4R)-3-((2R,3S,4S,5R,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-3-iodo-tetrahydro-pyran-2-yloxy)-4-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-dimethyl-silanyloxymethyl)-3,4-dihydro-2H-pyran 在
iodonium(di-γ-collidine) perchlorate 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以59%的产率得到[(2R,3S,4R)-4-benzoyloxy-3-[(2R,3S,4S,5R,6R)-4-[tert-butyl(dimethyl)silyl]oxy-6-[[tert-butyl(dimethyl)silyl]oxymethyl]-3-iodo-5-[(2R,3S,4S,5R,6R)-3-iodo-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,4-dihydro-2H-pyran-2-yl]methyl benzoate