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Reimer-Tiemann reaction introduces an al...

Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electrophilic aromatic subsititution. It is a general method for the synthesis of subsituted salicyladehydes as depiced below:

Which one of the following reagents is used in the above reaction ?

A

`aq. NaOH+CH_(3)CI`

B

`aq. NaOH+CH_(2)CI_(2)`

C

`aq. NaOH+CHCI_(3)`

D

`aq. NaOH+CCI_(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
NA
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Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electrophilic aromatic subsititution. It is a general method for the synthesis of subsituted salicyladehydes as depiced below: The electrophile in this reaction is:

Consider the following reactions: Which of the following group(s) of reagents is/are used in the above conversion?

Knowledge Check

  • Assertion : Aromatic aldehydes and ketones undergo electrophilic substitution reaction at metaposition. Reason : Carbonyl group activates the ring towards electrophilic substitution reactions.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • If aromatic ring is substituted by more than groups then electrophilic aromatic substitution reaction take place according to more activating group.Types of group which donate electron in aromatic ring known as activating groups. Find out correct product of reaction.

    A
    B
    C
    D
    NO reaction

  • If aromatic ring is substituted by more than groups then electrophilic aromatic substitution reaction take place according to more activating group.Types of group which donate electron in aromatic ring known as activating groups. Major product formation take place at which position in this reaction :

    A
    3
    B
    1
    C
    6
    D
    4

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