Which of the following reactions give the poor yield of amine products?

Options

A. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-overset(O)overset(||)C-NH_(2) overset(Br_(2)+NaOH)underset(Delta)to`
B.
C. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-Br + NH_(3) to `
D.

Answer

To determine which reactions give a poor yield of amine products, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Reaction Types**:
- We need to identify the type of reactions involved in each option and how they relate to the formation of amines.

2. **Option 1: Reaction of CONH2 with Br2NOH**:
- This reaction is identified as a Hofmann bromamide reaction. The product formed is an amine, specifically CH3CNH3. This reaction typically yields a good amount of amine product.

3. **Option 2: Reaction of Al2O3 with NaOH**:
- In this case, the reaction leads to the formation of azoxybenzene (C6H5-N=N-O-C6H5). This reaction does not produce amines at all, leading to a poor yield of amine products.

4. **Option 3: Reaction involving a tertiary amine**:
- Here, a tertiary amine is involved, which tends to favor elimination reactions over substitution reactions. The formation of amines occurs, but the yield is low due to the preference for elimination pathways (SN1 mechanism). Thus, the yield of amine products is poor.

5. **Option 4: Reaction with NH3 and H2 over Pt**:
- This reaction involves the reduction of a compound using hydrogen in the presence of platinum, which typically yields amines effectively. Therefore, this reaction does not yield a poor amount of amine products.

### Conclusion:
Based on the analysis, the options that give a poor yield of amine products are:
- **Option 2** (Al2O3 + NaOH leading to azoxybenzene)
- **Option 3** (Tertiary amine leading to elimination reactions)

### Final Answer:
The reactions that give a poor yield of amine products are **Option 2 and Option 3**.