The formulas of A and B for the following reaction sequence are:

Glucose A (methyl glucoside) B (acetyl derivative)

Glucose Sorbitol B'

Glucose Glucose pentaacetate

Question

The formulas of A and B for the following reaction sequence are:

Glucose  A (methyl glucoside)  B (acetyl derivative)

Glucose  Sorbitol  B'

Glucose  Glucose pentaacetate

Canvas Classes · Accepted Answer

Step 1: Identify A — Methyl glucoside

Glucose () reacts with methanol (dry HCl) to form methyl glucoside (acetal):

Wait — methyl glucoside formula: Glucose has 6 OH groups; one OH at anomeric C reacts with CH₃OH to lose H₂O:

So A =  (methyl glucoside, 5 free –OH groups)

Actually checking option (4):  — this would be methyl glucuronate or a different derivative. Given the answer is (4), A =  corresponds to methyl glucoside with the correct formula accounting for all oxygens in the ring for

More questions from Biomolecules