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The reaction of isatoic anhydride, amines, and aldehydes in the presence of a microporous zeolite gave 2,3-dihydroquinazolin-4(1H)-one derivatives with good to excellent yield. The yield depends on the structure of the aldehyde and/or amine compound.
a Crude product.
b Recrystallized product.
a Isolated yield.
b In toluene.
c Not determined.
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