Find the correct statements regarding the methyl glucosides obtained by the reaction of D-Glucose with methanol in presence of dry HCl gas.

Options

A. These are methyl ether of hemiacetal of glucose formed by intramolecular reaction.
B. These are enantiomers.
C. These are anomers.
D. In one of these all the substituents are equatorial.

Answer

To find the correct statements regarding the methyl glucosides obtained by the reaction of D-Glucose with methanol in the presence of dry HCl gas, we will analyze the process step by step.

### Step 1: Understand the Reaction
- **Reactants**: D-Glucose (C6H12O6) and Methanol (CH3OH) in the presence of dry HCl.
- **Process**: The dry HCl acts as a catalyst, facilitating the reaction between D-Glucose and Methanol to form methyl glucosides.

### Step 2: Formation of Methyl Glucosides
- D-Glucose can exist in a cyclic form (pyranose) where the aldehyde group reacts with the hydroxyl group on the 5th carbon to form a hemiacetal.
- In the presence of methanol, the hydroxyl group on the anomeric carbon (C1) is replaced by a methoxy group (OCH3), forming methyl glucoside.

### Step 3: Analyze the Statements
1. **Option A**: "These are the methyl esters of hemiacetals of glucose formed by the intramolecular reaction."
- **Analysis**: This statement is correct. The reaction forms methyl glucosides which are indeed methyl esters of the hemiacetals of glucose.

2. **Option B**: "These are the enantiomers."
- **Analysis**: This statement is incorrect. Enantiomers are mirror images of each other. The methyl glucosides formed are not mirror images of D-Glucose.

3. **Option C**: "These are the anomers."
- **Analysis**: This statement is correct. Anomers are a type of stereoisomer that differ at the anomeric carbon (C1). The methyl glucosides differ in configuration at this carbon.

4. **Option D**: "In one of these products, all the substituents are equatorial."
- **Analysis**: This statement is correct. In the chair conformation of the glucoside, it is possible for all substituents to be in equatorial positions, which is more stable.

### Conclusion
The correct statements regarding the methyl glucosides obtained from the reaction of D-Glucose with methanol in the presence of dry HCl are:
- **Option A**: Correct
- **Option C**: Correct
- **Option D**: Correct
- **Option B**: Incorrect

### Final Answer
The correct options are A, C, and D.

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