重氮甲烷 、 (4S,5S,6S)-5-((S)-1-Acetoxy-ethyl)-4-carboxymethyl-6-((2S,3R,4S,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-5,6-dihydro-4H-pyran-3-carboxylic acid methyl ester 以
乙醚 为溶剂,
生成
(4S,5S,6S)-5-((S)-1-Acetoxy-ethyl)-4-methoxycarbonylmethyl-6-((2S,3R,4S,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-5,6-dihydro-4H-pyran-3-carboxylic acid methyl ester