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 在
三氟乙酸 作用下,
以
水 为溶剂,
反应 24.0h,
以88%的产率得到2,2-Dimethyl-propionic acid (2S,3R,4S,5R,8R,9S)-2,8-bis-(2,2-dimethyl-propionyloxymethyl)-2,3,4,9-tetrahydroxy-6-oxo-1,7-dioxa-spiro[4.4]non-9-ylmethyl ester