Question

The correct statement about the following disaccharide is

• A. Ring $(i)$ is pyranose with $\alpha$-glycosidic link
• B. Ring $(i)$ is furanose with $\alpha$-glycosidic link
• C. Ring $(ii)$ is furanose with $\alpha$-glycosidic link
• D. Ring $(ii)$ is pyranose with $\beta$-glycosidic link

Answer 1

Answer: (A)

Ring $(i)$ is pyranose with $\alpha$-glycosidic link

Answer 2

The six-membered cyclic ether is known as pyranose while the five membered cyclic ether is known as furanose. Hence, ring
(a) is a pyranose and it has ether linkage at $\alpha$-position that is known as $\alpha$-glycosidic linkage in carbohydrate chemistry