The disaccharide lactulose consists of a D-galactopyranose subunit and a D-fructofuranose subunit joined by a B-1,4'-glycosidic linkage. After treatment of lactulose with 1. excess CH3I/Ag20, 2. HCI/H20, the D-galactopyranose subunit was found to have one nonmethylated OH group, whereas the D-fructofuranose subunit had two. Draw the structure of a-lactulose.

The disaccharide lactulose consists of a D-galactopyranose subunit and a D-fructofuranose subunit joined by a B-1,4'-glycosidic linkage. After treatment of lactulose with 1. excess CH3I/Ag20, 2. HCI/H20, the D-galactopyranose subunit was found to have one nonmethylated OH group, whereas the D-fructofuranose subunit had two. Draw the structure of a-lactulose.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The disaccharide lactulose consists of a D-galactopyranose subunit and a D-fructofuranose subunit joined by a B-1,4'-glycosidic linkage. After treatment
of lactulose with 1. excess CH3I/Ag20, 2. HCI/H20, the D-galactopyranose subunit was found to have one nonmethylated OH group, whereas the
D-fructofuranose subunit had two. Draw the structure of a-lactulose.

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