Phenyl isocynanides are preapred from which of the following reactions

Options

A. Rosenmund's reaction
B. Carbylamine reaction
C. Reimer-Tiemann reaction
D. Wurtz reaction.

Explanation

To determine how phenyl isocyanides are prepared, we need to analyze the reactions provided. Here's a step-by-step solution:

### Step 1: Identify the Reactions
We have several reactions to consider:
1. Rosenmund Reduction
2. Carbylamine Reaction
3. Reimer-Tiemann Reaction
4. Wurtz Reaction

### Step 2: Analyze Each Reaction
1. **Rosenmund Reduction**:
- This reaction converts acid chlorides to aldehydes using palladium (Pd) and hydrogen (H2).
- It does not produce isocyanides, so this reaction is not relevant.

2. **Carbylamine Reaction**:
- In this reaction, an amine (NH2) reacts with chloroform (CHCl3) and a strong base (KOH).
- The product of this reaction is phenyl isocyanide.
- Therefore, this reaction is relevant and produces the desired compound.

3. **Reimer-Tiemann Reaction**:
- This reaction involves the reaction of phenol with chloroform and sodium hydroxide (NaOH) to produce salicylaldehyde.
- This does not yield isocyanides, so it is not relevant.

4. **Wurtz Reaction**:
- This reaction involves the coupling of haloalkanes in the presence of sodium (Na) to form alkanes.
- It does not produce isocyanides, so this reaction is also not relevant.

### Step 3: Conclusion
After analyzing all the reactions, we conclude that the **Carbylamine Reaction** is the one that produces phenyl isocyanides.

### Final Answer
Phenyl isocyanides are prepared from the **Carbylamine Reaction**.

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