Introduce a strong base, such as potassium carbonate (K2CO3), to the reaction mixture. The base will deprotonate the amine, generating the amine anion (RNH2) which is a more effective nucleophile.
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N-phenyl-N-4-trifluoromethylphenylbenzamide
1,4,5,7-tetramethyl-2,3-dithia-5,7-diazabicyclo[2.2.2]octane-6,8-dione
METHANOL
Iodine
