phenyl 2,4,6-tri-O-acetyl-3-O-cyanomethyl-1-thio-β-D-galactopyranoside 在
4 A molecular sieve 、
溴 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
生成 [(2S,3R,4S,5S,6R)-2-((2R,3S,4R,5R,6R)-5-Acetylamino-4-hydroxy-2-hydroxymethyl-6-octyloxy-tetrahydro-pyran-3-yloxy)-3,5-dihydroxy-6-hydroxymethyl-tetrahydro-pyran-4-yloxy]-acetic acid