(3a
R)-7
c-acetoxy-5
c-acetoxymethyl-2-methyl-(3a
r,7a
c)-5,6,7,7a-tetrahydro-3a
H-pyrano[3,2-
d]oxazol-6
t-yl tri-
O-acetyl-2-acetylamino-β-
D-2-deoxy-glucopyranoside 在
camphor-10-sulfonic acid 作用下,
以
二氯甲烷 、
溶剂黄146 为溶剂,
反应 10.5h,
生成
allyl 2-O-<2-acetamido-4-O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-3,6-di-O-acetyl-2-deoxy-β-D-glucopyranosyl>-α-D-galactopyranosiduronamide