2,2-Dimethyl-propionic acid (4S,5R)-4-{(3aR,6R,6aS)-6-[2-(2,2-dimethyl-propionyloxy)-acetyl]-2,2-dimethyl-4-oxo-dihydro-furo[3,4-d][1,3]dioxol-3a-yl}-5-(2,2-dimethyl-propionyloxymethyl)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester 在
三氟乙酸 作用下,
以
水 为溶剂,
反应 0.5h,
以74%的产率得到2,2-Dimethyl-propionic acid (4S,5R,8R,9S)-4-[(S)-3-(2,2-dimethyl-propionyloxy)-1-hydroxy-2-oxo-propyl]-8-(2,2-dimethyl-propionyloxymethyl)-9-hydroxy-2,2-dimethyl-6-oxo-1,3,7-trioxa-spiro[4.4]non-9-ylmethyl ester