When phenol is treated with CHCl_3 and NaOH f | vedclass

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(D) The reaction described is the Reimer-Tiemann reaction. $1$. First,$CHCl_3$ reacts with $OH^-$ to generate the electrophile dichlorocarbene,$:CCl_2

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Both $(B)$ and $(C)$

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(D) The reaction described is the Reimer-Tiemann reaction. $1$. First,$CHCl_3$ reacts with $OH^-$ to generate the electrophile dichlorocarbene,$:CCl_2$. $2$. The phenoxide ion attacks the dichlorocarbene to form a cyclohexadienyl anion intermediate,which is represented by structure $(B)$. $3$. This intermediate undergoes a proton shift to form the ortho-dichloromethyl phenoxide ion,which is represented by structure $(C)$. $4$. Therefore,both $(B)$ and $(C)$ are intermediates involved in the mechanism of the Reimer-Tiemann reaction.

When phenol is treated with $CHCl_3$ and $NaOH$ followed by acidification,salicylaldehyde is produced. Which of the following intermediates is involved in the above reaction?

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