Which of the following reactions is not called Bouveault- Blanc reduction :

Options

A. `R-CHO overset(Na+"ethanol")to R-CH_2OH`
B. `R-CO-R^'overset(Na+"ethanol")to R-CHOH-R^'`
C. `R-COOH overset(LiAlH_4)to R -CH_2OH`
D. `RCOOR^' overset(Na+"ethanol")to R-CH_2OH+R^'OH`

Answer

To determine which reaction is not called Bouveault-Blanc reduction, we need to understand what Bouveault-Blanc reduction entails.

### Step-by-Step Solution:

1. **Understanding Bouveault-Blanc Reduction**:
- Bouveault-Blanc reduction is a method used to reduce carbonyl compounds (like aldehydes and ketones) to alcohols using sodium metal in the presence of ethanol (or other alcohols).

2. **Identifying the Reagents**:
- The key reagent in Bouveault-Blanc reduction is sodium (Na) combined with ethanol (C2H5OH). This combination is crucial for the reduction process.

3. **Analyzing the Options**:
- We need to look at the given options and identify which one does not involve sodium and ethanol as the reducing agents.
- The options likely include various reducing agents such as lithium aluminum hydride (LiAlH4), sodium borohydride (NaBH4), and others.

4. **Recognizing the Non-Bouveault-Blanc Reduction**:
- Lithium aluminum hydride (LiAlH4) is a strong reducing agent used for reducing esters, carboxylic acids, and other carbonyl compounds, but it is not part of the Bouveault-Blanc reduction process.
- Therefore, if one of the options lists lithium aluminum hydride, that would be the correct answer.

5. **Conclusion**:
- The reaction that is not called Bouveault-Blanc reduction is the one that involves lithium aluminum hydride (LiAlH4).

### Final Answer:
The reaction that is not called Bouveault-Blanc reduction is the one involving **lithium aluminum hydride (LiAlH4)**.

---