6-<<β-D-(Tri-O-acetyl)xylopyranosyl>amino>-3-methyl-2-methoxy-5-nitrosopyrimidin-4(3H)-one 在
sodium dithionite 作用下,
以
甲醇 、
水 为溶剂,
反应 0.25h,
以60%的产率得到Acetic acid (2R,3R,4S,5R)-4,5-diacetoxy-2-(5-amino-2-methoxy-1-methyl-6-oxo-1,6-dihydro-pyrimidin-4-ylamino)-tetrahydro-pyran-3-yl ester