Question

Which of the following steps is not present in Gabriel phthalimide synthesis?

(a) Treating phthalimide with alcoholic KOH

(b) Heating potassium phthalimide with alkyl halide

(c) Alkaline hydrolysis of N-alkylphthalimide

(d) Heating phthalic acid with NaOH

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I'd like to ask this question from Preparation of Amines in division Amines of Chemistry – Class 12

Answer 1

Correct answer is (d) Heating phthalic acid with NaOH

To elaborate: The chemical compounds involved in the Gabriel phthalimide synthesis are phthalimide, potassium phthalimide and N-alkyl phthalimide. These are formed in order when reacted with different reagents like KOH and haloalkanes.