Advertisements
Advertisements
प्रश्न
Amongst the given set of reactants, the most appropriate for preparing 2° amine is ______.
विकल्प
\[\ce{2° R - Br + NH3}\]
\[\ce{2° R - Br + NaCN followed by H2 /Pt}\]
\[\ce{1° R - NH2 + RCHO followed by H2/Pt}\]
\[\ce{1° R - Br (2 mol) + potassium phthalimide followed by H3O+/heat}\]
Advertisements
उत्तर
Amongst the given set of reactants, the most appropriate for preparing 2° amine is \[\ce{1° R - NH2 + RCHO followed by H2/Pt}\].
Explanation:
\[\ce{\underset{1° Amine}{R - NH2} + \underset{Aldehyde}{O = HCR} ->[Reductive][amination] R - N - CHR ->[H2/Pt][Reduction] \underset{2° Amine}{RNH - CH2R}}\]
APPEARS IN
संबंधित प्रश्न
Accomplish the following conversion:
Benzamide to toluene
Give the structure of A, B and C in the following reaction:
\[\ce{C6H5N2Cl ->[CuCN] A ->[H2O/H+] B ->[NH3][\Delta] C}\]
Give the structure of A, B and C in the following reaction:
\[\ce{C6H5NO2 ->[Fe/HCl] A ->[NaNO2 + HCl][273 K] B ->[H2O/H+][\Delta] C}\]
Arrange the following in the increasing order of their pKb values:
C6H5NH2, C2H5NH2, C6H5NHCH3
Give the structures of A, B and C in the following reactions :
Explain the following reaction with a suitable example.
Hofmann elimination reaction
Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide.
Which of the following amines forms a clear solution when treated with benzene sulphonyl chloride and excess of potassium hydroxide?
Which of the following amines cannot be prepared by Gabriel phthalimide synthesis?
Which of the following compounds is obtained when quaternary ammonium hydroxide is strongly heated?
The best reagent for converting 2–phenylpropanamide into 2-phenylpropanamine is ______.
The reagents that can be used to convert benzenediazonium chloride to benzene are:
(i) \[\ce{SnCl2/HCl}\]
(ii) \[\ce{CH3CH2OH}\]
(iii) \[\ce{H3PO2}\]
(iv) \[\ce{LiAlH4}\]
Write following conversions:
acetanilide `->` p-nitroaniline
How will you carry out the following conversions?
Assertion: Hoffmann’s bromamide reaction is given by primary amines.
Reason: Primary amines are more basic than secondary amines.
A primary amine is formed by an amide on treatment with bromine and alkali. The primary amine has
C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by:-
- Phenyl methenamine
- N, N - Dimethylaniline
- N - Methyl aniline
- Benzenamine
Choose the correct order of the basic nature of the above amines.
Write short note on the following.
Ammonolysis.
