(1S,2S,4R,5S)-4-((R)-1-carboxy-2-phenyl-ethoxy)-5-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-cyclohexane-1,2-dicarboxylic acid di-tert-butyl ester 在
sodium methylate 作用下,
以
甲醇 为溶剂,
以70%的产率得到(1S,2S,4R,5S)-4-((R)-1-carboxy-2-phenyl-ethoxy)-5-(β-D-galactopyranosyl)-cyclohexane-1,2-dicarboxylic acid di-tert-butyl ester