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:

Options

A. `_(**)^(**)CHCl`
B. `^(+)CH Cl_(2)`
C. `_(**)^(**)C Cl_(2)`
D. `^(**)CH Cl_(2)`

Answer

C