醋酸甲脒 、
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 以
乙二醇甲醚 为溶剂,
反应 3.0h,
以60%的产率得到Acetic acid (2R,3R,4S,5R)-4,5-diacetoxy-2-(2-methoxy-1-methyl-6-oxo-1,6-dihydro-purin-9-yl)-tetrahydro-pyran-3-yl ester