2,3,4-tri-O-acetyl-L-rhamnopyranosyl bromide 在
20α-acetamido-5β,14β-pregnane-3β,14-diol 、 silver carbonate 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
生成 20α-amino-14-hydroxy-5β,14β-pregnan-3β-yl 3,4-di-O-acetyl-α-L-rhamnopyranose-1-C,2-C-diyl orthoacetate 、
3,4-diacetyl-α-L-rhamnopyranose-1-C,2-C-diyl 2,3,4-tri-O-acetyl-β-D-rhamnopyranosyl orthoacetate 、 20α-acetamido-14-hydroxy-5β,14β-pregnan-3β-yl 3,4-di-O-acetyl-α-L-rhamnopyranose-1-C,2-C-diyl orthoacetate 、
1,2,3,4-tetra-O-acetate-β-L-rhamnopyranoside