It is believed that chloroform and hydroxide ion react to produce an electron deficient intermediate dichlorocarbene : `C Cl_(2) (DC C)`

Treatment of phenol with DCC in basic medium introduces an aldehyde group, onto the aromatic ring. This reaction is known as Reimer Tiemann reaction.

The Reimer-Tiemann reaction involves electrophilic substitution on highly reactive phenoxide ring The electrophilic reagent is dichloro carbene : `C Cl_(2)`.


o-product is major product because :
(i) There are two o-positions available as compared to one para.
(ii) o-product is more stable due to the formation ofsix membered chelate formation.

If `1^(@)` amines (aliphatic and aromatic) react with DCC in basic medium it yield isocyanide or carbylamine. The reaction is known as carbylamine reaction.

The product is known as isocyanide & it is a foul smelling substance.
Step marked by * is :

Options

A. Aromatization reaction
B. intramolecular acid base reaction
C. both of the above
D. none of the above

Answer

C