Question

Phenol can be converted to o-hydroxy-benzaldehyde by
(a) Kolbe’s reaction
(b) Reimer-Tiemann reaction
(c) Wurtz reaction
(d) Cannizaro reaction

Answer 1

Answer:

Phenol can be converted to o-hydroxy-benzaldehyde by

(a) Kolbe’s reaction

(b) Reimer-Tiemann reaction✔️

(c) Wurtz reaction

(d) Cannizaro reaction

Answer 2

(b) Reimer-Tiemann reaction is an appropriate answer.

Reaction:

• When phenols i.e. C₆H₅OH are handled with CHCl₃ (chloroform) withinside the presence of NaOH (sodium hydroxide), an aldehyde group (-CHO) is brought on the ortho function of the benzene ring main to the formation of o-hydroxybenzaldehyde.

Explanation:

• The response is popularly referred to as the Reimer Tiemann response.
• The response is used for the ortho-formylation of C₆H₅OH (phenols).

Phenol is transformed into an ortho-hydroxy benzaldehyde by the usage of chloroform, a base, and acid workup.

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