4-Methyl-benzoic acid (2R,3R,4S,5R,6R)-2-[(2R,3R,4S,5R,6S)-5-benzoyloxy-3-benzyloxy-6-ethylsulfanyl-4-(9H-fluoren-9-ylmethoxycarbonyloxy)-tetrahydro-pyran-2-ylmethoxy]-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-3-yl ester 在
哌啶 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 4-Methyl-benzoic acid (2R,3R,4S,5R,6R)-2-((2R,3S,4S,5R,6S)-5-benzoyloxy-3-benzyloxy-6-ethylsulfanyl-4-hydroxy-tetrahydro-pyran-2-ylmethoxy)-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-3-yl ester