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The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is:
A
Aniline
B
Pyridine
C
N-methylaniline
D
Triethylamine
Detailed Solution
Aniline's $-NH_2$ group forms a salt with the Lewis acid catalyst ($AlCl_3$) used in Friedel-Crafts reactions, deactivating the ring towards Friedel-Crafts alkylation. Since aniline is a primary amine, it gives a positive carbylamine (isocyanide) test with $CHCl_3/KOH$. N-methylaniline and triethylamine are secondary/tertiary amines and do not give the carbylamine test.