Page 65 - Pharm.Org.Chem-I 02-06-05-101
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Assigning R,S Configurations
to Fischer Projections
COOH
H2N H
CH3
Alanine
125
CO2 OH Rotate counterclockwise 4H
H
H2N1 = 21
4
HOOC NH2
3CH3 Hold −CH3 steady 3 CH3
2 4H 1 HOO2C 4H N1H2
HOOC NH2 =
3 CH3 3CH3
S stereochemistry
126
63
