Subject: Organic Chemistry · Chapter: Natural Products · Topic: Natural Products & – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Medium
A disaccharide K gives a silver mirror with Tollen's reagent. Treatment of K with $\mathrm{MeOH} / \mathrm{HCl}$ gives a monomethyl derivative L , which does not react with Tollen's reagent. Methylation of K with $\mathrm{Me}_{2} \mathrm{SO}_{4}$ and NaOH affords an octamethyl derivative of K , which upon acidic hydrolysis gives a $1: 1$ mixture of $2,3,4$, 6-tetra-O-methyl-D glucose and 2, 3, 4-tri-O-methyl-D-glucose. Disaccharide K is also hydrolysed by the enzyme maltase. Identify K and L with proper stereochemistry.
Answer
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