3-Chloro-benzoic acid (2S,3R,6R)-2-[(2R,4S,5R,6S)-5,6-bis-benzyloxy-4-(tert-butyl-dimethyl-silanyloxy)-2-methyl-dihydro-pyran-(3Z)-ylideneaminooxy]-4-(tert-butyl-dimethyl-silanyloxy)-6-methyl-3,6-dihydro-2H-pyran-3-yl ester 在
二异丁基氢化铝 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以91%的产率得到(2R,4S,5R,6S)-5,6-Bis-benzyloxy-4-(tert-butyl-dimethyl-silanyloxy)-2-methyl-dihydro-pyran-3-one O-[(2S,3R,6R)-4-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-6-methyl-3,6-dihydro-2H-pyran-2-yl]-oxime