हिंदी

Answer the following Explain Gabriel phthalimide synthesis.

Advertisements
Advertisements

प्रश्न

Answer the following

Explain Gabriel phthalimide synthesis.

संक्षेप में उत्तर
Advertisements

उत्तर

This method is used for the synthesis of primary amine. It involves the following three stages.

i. Formation of the potassium salt of phthalimide from phthalimide on reaction with alcoholic potassium hydroxide.

ii. Formation of N-alkyl phthalimide from the potassium salt by reaction with an alkyl halide.

iii. Alkaline hydrolysis of N-alkyl phthalimide to form the corresponding primary amine.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 13: Amines - Exercises [पृष्ठ २९७]

APPEARS IN

बालभारती Chemistry [English] Standard 12 Maharashtra State Board
अध्याय 13 Amines
Exercises | Q 3.06 | पृष्ठ २९७

संबंधित प्रश्न

How are propan-1-amine and propan-2-amine prepared from oxime?


Write a short note on Hoffmann bromamide degradation.


Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction


An aromatic compound 'A' of molecular formula C7H7ON undergoes a series of reactions as shown below. Write the structures of A, B, C, D and E in the following reactions :


How do you convert the following: Ethanenitrile to ethanamine


Give the structures of A, B and C in the following reactions :


Write a short note on the following:

Hoffmann’s bromamide reaction


Give the structure of A, B and C in the following reaction:

\[\ce{C6H5NO2 ->[Fe/HCl] A ->[NaNO2 + HCl][273 K] B ->[H2O/H+][\Delta] C}\]


Give the structures of A, B and C in the following reaction:

\[\ce{C6H5NO2 ->[Fe/HCl] A ->[HNO2][273 K] B ->[C6H5OH] C}\]


Give a plausible explanation for the following:

Why are amines less acidic than alcohols of comparable molecular masses?


Explain the mechanism of action of hydroiodic acid on 3-methylbutan-2-ol.


Mention 'two' uses of propan-2-one.


Give the structures of A, B and C in the following reactions :


Answer the following

Explain the ammonolysis of alkyl halides.


Name the process of breaking C-X bond by ammonia in preparation of amines.


Why cannot aniline be prepared by Gabriel phthalimide synthesis?


Explain the following reaction with a suitable example.

Hofmann elimination reaction


Identify compound 'B' in following series of reactions?

\[\ce{Acetonitrile ->[Na/alcohol] A ->[NaNO2/dil.HCI] B}\]


Alkyl cyanides on reduction by sodium and ethanol give primary amines. This reaction is called as ____________.


Identify the product obtained when benzyl chloride undergoes ammonolysis in presence of excess ammonia followed by the reaction with two moles of methyl iodide.


____________ can be prepared exclusively by Gabriel phthalimide synthesis.


\[\ce{CH3-CN ->[Na/C2H5OH]}\]

The product formed is ____________.


Which of the following amines forms a clear solution when treated with benzene sulphonyl chloride and excess of potassium hydroxide?


Identify the product obtained when benzamide is treated with bromine and aqueous sodium hydroxide?


Identify the INCORRECT statement regarding Hofmann bromamide reaction.


Which of the following reagents is used in Mendius reduction reaction of alkyl cyanide?


Identify product B in the following reaction.

\[\ce{Aniline ->[NaNO2][HCl] A ->[KI] B}\]


Which of the following reagents is used in Hofmann's elimination reaction of amines?


Which of the following compounds is obtained when quaternary ammonium hydroxide is strongly heated?


Nitro compounds are reduced by iron scrap and hydrochloric acid to yield one of the following compounds:


For producing amines, the reaction of nitro compounds with iron scrap is preferred because:


Quaternary ammonium salt is formed:


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Alkyl halides are insoluble in water.

Reason (R): Alkyl halides have halogen attached to sp3 hybrid carbon.

Select the most appropriate answer from the options given below:


Amongst the following, the strongest base in aqueous medium is ______.


Benzylamine may be alkylated as shown in the following equation:

\[\ce{C6H5CH2NH2 + R - X -> C6H5CH2NHR}\]

Which of the following alkylhalides is best suited for this reaction through SN1 mechanism?


Reduction of aromatic nitro compounds using \[\ce{Fe}\] and \[\ce{HCl}\] gives ______.


The reagents that can be used to convert benzenediazonium chloride to benzene are:

(i) \[\ce{SnCl2/HCl}\]

(ii) \[\ce{CH3CH2OH}\]

(iii) \[\ce{H3PO2}\]

(iv) \[\ce{LiAlH4}\]


Which of the following amines can be prepared by Gabriel synthesis.

(i) Isobutyl amine

(ii) 2-Phenylethylamine

(iii) N-methylbenzylamine

(iv) Aniline


Which of the following reactions are correct?

(i)

(ii)

(iii)

(iv)


Write following conversions:

nitrobenzene `->` acetanilide


Write following conversions:

acetanilide `->` p-nitroaniline


How will you carry out the following conversions?


Account for the following:

Aniline cannot be prepared by the ammonolysis of chlorobenzene under normal conditions.


Give reasons for the following:

Ammonolysis of alkyl halides is not a good method to prepare pure primary amines.


Which of the following reaction DOES NOT involve Hoffmann bromamide degradation?


Methyl amine on reaction with chloroform in the presence of NaOH gives ______.


The amine 'A' when treated with nitrous acid gives yellow oily substance. The amine A is ______.


Amides can be converted into amines by the reaction named ______.


Write short note on the following:

Ammonolysis


Write a short note on the following:

Ammonolysis


Write the name of reduction product formed when ethyl cyanide is treated with sodium and alcohol.


Write short note on the following:

Ammonolysis


Write a short note on the following:

Ammonolysis


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×