Drawing Haworth Structures for Sugars D-Mannose, a carbohydrate found in immunoglobulins, has the following Fischer projection. Draw the Haworth structure for β-D-mannose.

Question

Drawing Haworth Structures for Sugars

D-Mannose, a carbohydrate found in immunoglobulins, has the following Fischer projection. Draw the Haworth structure for β-D-mannose.

Accepted Answer

Step [latex]\fbox{1}[/latex] Turn the Fischer projection clockwise by 90 °.

Step [latex]\fbox{2}[/latex] Fold the horizontal carbon chain into a hexagon and bond the O on carbon 5 to the carbonyl group.

Step [latex]\fbox{3}[/latex] Draw the new ---OH group on carbon 1 above the ring to give the β isomer.

Guide to Drawing Haworth Structures

Step [latex]\fbox{1}[/latex]

Turn the Fischer projection clockwise by 90 °.

Step [latex]\fbox{2}[/latex]

Fold the horizontal carbon chain into a hexagon and bond the O on carbon 5 to the carbonyl group.

Step [latex]\fbox{3}[/latex]

Draw the new ---OH group on carbon 1 above the ring to give the β isomer.

Question 13.5: Drawing Haworth Structures for Sugars D-Mannose, a carbohydr...