p-Methoxyphenyl O-(2,4-di-O-benzyl-β-D-galactopyranosyl)-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside 、
对甲基苯甲酰氯 在
吡啶 作用下,
以60%的产率得到4-Methyl-benzoic acid (2R,3R,4S,5R,6S)-3,5-bis-benzyloxy-6-[(2R,3S,4R,5R,6S)-4-benzyloxy-2-benzyloxymethyl-5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-6-(4-methoxy-phenoxy)-tetrahydro-pyran-3-yloxy]-4-hydroxy-tetrahydro-pyran-2-ylmethyl ester