Depending on the specific reaction conditions, the urea intermediate could undergo intramolecular cyclization to form the desired quinazoline or quinazolinone ring system. Copper catalysis can help facilitate this cyclization step.
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6-propyl-[1,3]dioxolo[4,5-g]quinazoline
2-Bromobenzaldehyde
Acetamidine hydrochloride
methyl 3-aceto-4-oxo-4-(4-chlorophenyl)butanoate
6-(4-Hydroxy-butyl)-2-phenyl-3,4-dihydro-2H-pyran-4-ol
1-ethynyl-2-(2-methylprop-1-en-1-yl)cyclohex-1-ene
(2E)-1-(3,4-dihydroquinolin-1(2H)-yl)-3-phenylprop-2-en-1-one
2-bromo-4-methoxy-5-methylaniline
2H-Pyran-2-one, 4-[[4-(2,4-dichlorophenoxy)-2-butynyl]thio]-6-methyl-
(E)-1-phenyl-5-(p-toluenesulfonyl)-5-azaoct-1-en-7-yn-3-one
