Consider the following reactions:
(i) Glucose Acetal acetyl derivative
(ii) Glucose A acetyl derivative
(iii) Glucose acetyl derivative

'x', 'y' and 'z' in these reactions are respectively.

Question

Consider the following reactions:
(i) Glucose  Acetal  acetyl derivative
(ii) Glucose  A  acetyl derivative
(iii) Glucose  acetyl derivative

'x', 'y' and 'z' in these reactions are respectively.

Canvas Classes · Accepted Answer

Counting free –OH groups in each case:

Reaction (i): Glucose → Acetal (methyl glucoside) → acetyl derivative

Glucose (open chain: 5 –OH groups) reacts with ROH (dry HCl) to form methyl glucoside (acetal):
- The anomeric –OH (C1) reacts with ROH → acetal (–OR replaces –OH)
- Remaining free –OH groups: C2, C3, C4, C6 = 4 –OH groups
- x = 4 equivalents of Ac₂O

Reaction (ii): Glucose → Sorbitol (A) → acetyl derivative

Glucose  Sorbitol (glucitol, ):
- Reduction of –CHO to –CH₂OH
- Sorbitol has 6

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