Isobutyric acid (2R,3R,4R,5R)-2-[8-(4-dimethylamino-phenyl)-2-isobutyrylamino-6-oxo-1,6-dihydro-purin-9-yl]-4-isobutyryloxy-5-isobutyryloxymethyl-tetrahydro-furan-3-yl ester 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
甲醇 、
二氯甲烷 、
乙腈 为溶剂,
生成 Isobutyric acid (2R,3R,4R,5R)-2-[2-amino-8-(4-dimethylamino-phenyl)-6-oxo-1,6-dihydro-purin-9-yl]-4-isobutyryloxy-5-isobutyryloxymethyl-tetrahydro-furan-3-yl ester