Question

Question #d3de0

Answer 1

Here's one way to do it.

Explanation:

Draw the Fischer projection of your sugar, e.g. glucose.

Now, rotate the Fischer projection 90° clockwise.

(Adapted from http://4.bp.blogspot.com)

Next, draw a template for a Haworth structure.

Look at the `"OH"` groups on carbons, 2, 3, and 4 of the Fischer projection.

Those on the right will be "down" in the Haworth structure. Those on the left will be "up".

If the sugar is a D-sugar, the `"CH"_2"OH"` group will be "up".

The OH on carbon 1 can be "down" for the α-anomer or "up" for the β-anomer.

And you have the Haworth structure of glucose.