((2R,3S,4S,5R,6R)-6-(benzyloxy)-4-hydroxy-3-(((3aS,4R,6S,7R,7aR)-7-hydroxy-2,2-dimethyl-4-((pivaloyloxy)methyl)tetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-6-yl)oxy)-5-(pivaloyloxy)tetrahydro-2H-pyran-2-yl)methyl pivalate 在
对甲苯磺酸 作用下,
以
1,4-二氧六环 、
甲醇 为溶剂,
以92%的产率得到2,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-benzyloxy-6-(2,2-dimethyl-propionyloxymethyl)-5-[(2S,3R,4S,5R,6R)-6-(2,2-dimethyl-propionyloxymethyl)-3,4,5-trihydroxy-tetrahydro-pyran-2-yloxy]-4-hydroxy-tetrahydro-pyran-3-yl ester