(2S,4R,5R,6S)-2,4-Bis-benzyloxy-5-hydroxy-6-((R)-2,2,4,4-tetraisopropyl-[1,3,5,2,4]trioxadisilepan-6-yl)-tetrahydro-pyran-2-carboxylic acid benzyl ester 在
4 A molecular sieve 、
sodium methylate 、
silver trifluoromethanesulfonate 作用下,
以
甲醇 为溶剂,
反应 74.5h,
生成
Benzyl-O-(2-O-acetyl-3,4,6,7-tetra-O-benzyl-L-glycero-α-D-manno-heptopyranosyl)-(1->5)-methyl-(4-O-benzyl-3-desoxy-7,8-O-tetraisopropyldisiloxan-1,3-diyl-β-D-manno-2-octulopyranosid)-onat