Acetic acid (3aS,5R,6R,7S,7aS)-6-acetoxy-5-acetoxymethyl-2-phenyl-2-(2-trimethylsilanyl-ethoxy)-tetrahydro-[1,3]dioxolo[4,5-b]pyran-7-yl ester 在
2,6-二叔丁基-4-甲基吡啶 、 4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
生成 Benzoic acid (3S,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-hydroxy-tetrahydro-pyran-3-yl ester