Drawing Sugars from Fischer Projections (PDF)




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An (almost too) easy way to draw sugars in Marvin from their Fischer Projections.
1. Knock it on it’s side, then tip/twist it back to give
it more familiar wedge and dashed bonds.

Do you see how these
are the same?

PLEASE NOTE: You should NEVER draw wedge and dashed bonds as they are
shown above. Wedge/dashed bonds should always be NEXT DOOR to each
other, never split by a stick bond! If you draw this in Marvin you will get the
RED X! To get the wedge/dashed bonds next door to each other, simply
imagine tipping or twisting the molecule backwards.

2. Draw the horseshoe backbone in Marvin from this Fischer
projection perspective (Do you see how this horseshoe chain
is what a Fischer projection looks like from the side? If we
rotated around every other bond of the horseshoe, we could
get the staggered chain we’re used to seeing).
3. Now draw in your Hs and OHs. Wedge and dash stay
wedge and dash!!






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