Which of the following amines can be directly oxidized to the corresponding nitro compound by potassium permanganate? (a) CH3NH2 (b) (CH3)2CH−NH2 (c)(CH3)2NH (d) C6H5NH2 (e) (CH3)3C−NH2
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Solution
Condition: The amine must be primary and −NH2 group should be bonded to a tertiary carbon
(a) CH3NH2→1o amine connected to primary carbon atom
(b) (CH3)2CH−NH2→1o amine connected to secondary carbon atom
(c)(CH3)2NH→2o amine
(d) C6H5NH2→1o amine connected to phenyl carbon atom
(e) (CH3)3C−NH2→1o amine connected to tertiary carbon atom