乙酸酐 、
Acetic acid (1R,2R,3R,4R,5R)-2-acetoxy-3-[(2R,3S)-3-acetoxy-1-(2,2,2-trifluoro-acetyl)-pyrrolidin-2-yl]-6,8-dioxa-bicyclo[3.2.1]oct-4-yl ester 以
三氟乙酸 为溶剂,
反应 24.0h,
以26%的产率得到[(2R,3R,4R,5R,6R)-3,5,6-triacetyloxy-4-[(2R,3S)-3-acetyloxy-1-(2,2,2-trifluoroacetyl)pyrrolidin-2-yl]oxan-2-yl]methyl acetate