Haworth projection is "flattened" diagrams used to represent the stereochemistry carbohydrates. The six-membered ring of D-pyranose is represented as flat and is viewed edge on. The ring oxygen is always placed in the back right-hand corner of the ring, with the anomeric carbon (C-1) on the right-hand side and the primary alcohol group drawn up from the back left-hand corner (C-5).

• Groups on the right in a Fischer projection are down (below the ring) in a Haworth projection (Figure 1).
• Groups on the left in a Fischer projection are up (above the ring) in a Haworth projection.

Scheme 1

D-Furanose is viewed edge on, with the ring oxygen away from the viewer. The anomeric carbon is on the right-hand side of the molecule, and the primary alcohol group is drawn up from the back left-hand corner (Figure 2).

Figure 2