Also known as 4-dimethylaminobenzaldehyde, p-Formyl-N,N-dimethylaniline, p-Formyldimethylaniline, N,N-Dimethyl-p-aminobenzaldehyde, Ehrlich's reagent, p-(Dimethylamino)benzaldehyde, p-(N,N-Dimethylamino)benzaldehyde
'''para-Dimethylaminobenzaldehyde''' is an organic compound containing amine and aldehyde moieties which is used in Ehrlich's reagent and Kovac's reagent to test for indoles. The carbonyl group typically reacts with the electron rich 2-position of the indole but may also react at the C-3 or N-1 positions. It may also be used for determination of hydrazine.
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'''para-Dimethylaminobenzaldehyde''' is an organic compound containing amine and aldehyde moieties which is used in Ehrlich's reagent and Kovac's reagent to test for indoles. The carbonyl group typically reacts with the electron rich 2-position of the indole but may also react at the C-3 or N-1 positions. It may also be used for determination of hydrazine.
==Ehrlich's reagent== para-Dimethylaminobenzaldehyde is the main ingredient in Ehrlich's reagent. It acts as a strong electrophile which reacts with the electron-rich α-carbon (2-position) of indole rings to form a blue-colored adduct. It can be used to detect the presence of indole alkaloids. Not all indole alkaloids give a colored adduct as result of steric hindrance which does not allow the reaction to proceed.
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