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Consider the following reactions: (i) Glucose + ROH dry HCl Acetal x eq. of (CH3CO)2O acetyl derivative (ii) Glucose Ni/H2 A y eq. of (CH3CO)2O acetyl derivative (iii) Glucose z eq. of (CH3CO)2O acetyl derivative 'x', 'y' and 'z' in these reactions are respectively.

1. 5, 6 & 5
2. 4, 5 & 5
3. 5, 4 & 5
4. 4, 6 & 5

Correct answer: 5, 6 & 5

Solution

The correct option indicates that in the first reaction, five equivalents of acetic anhydride are needed to fully acetylate the hydroxyl groups of glucose, while six equivalents are required in the second reaction due to the reduction of glucose to an intermediate that has additional reactive sites. The third reaction also requires five equivalents to acetylate the remaining hydroxyl groups.

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