乙酸酐 、 2-Methyl-3-phenyl-6-((3R,4S,5S,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-ylamino)-3H-quinazolin-4-one 在
吡啶 作用下,
以70%的产率得到Acetic acid (2R,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-(2-methyl-4-oxo-3-phenyl-3,4-dihydro-quinazolin-6-ylamino)-tetrahydro-pyran-3-yl ester