Page 62 - Pharm.Org.Chem-I 02-06-05-101
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The carbon chain is drawn along the
vertical line with the most highly oxidized
end carbon atom at the top.
1) Vertical lines: bonds going into the page.
2) Horizontal lines: bonds out of the page
Bonds out of page COOH Bonds into page COOH
COOH
HC = H C OH = H OH
HO CH3 CH3
CH3
(R)-Lactic acid Fischer projection
119
Allowed motions for Fischer projection:
1. 180° rotation (not 90° or 270°):
COOH HO CH3
H OH H
Same as
CH3 COOH
120
60
