carbonic acid 2-[5-(dimethylamino-methyleneamino)-2-oxo-thiazolo[4,5-d]pyrimidin-3-yl]-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-3-yl ester isopropyl ester 、
乙酸酐 在
吡啶 作用下,
反应 32.0h,
以82%的产率得到acetic acid 2-acetoxymethyl-5-(5-formylamino-2-oxo-thiazolo[4,5-d]pyrimidin-3-yl)-4-isopropoxycarbonyloxy-tetrahydro-furan-3-yl ester