2,2-二甲氧基丙烷 、
Acetic acid (1R,2S,3R,4R)-4-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-2,3-dihydroxy-cyclopentylmethyl ester 在
对甲苯磺酸 作用下,
以
丙酮 为溶剂,
生成 Acetic acid (3aS,4R,6R,6aR)-6-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-ylmethyl ester