PHC 222 Part(I) Dr. Huda Al Salem Lecture (4)
Factors that affect the affinity 3- Stereochemistry of the drug
Example 1: Acetylcholine
3- Stereochemistry of the drug Conformation is the spatial arrangement of atoms in a molecule that comes from free rotation of atoms around a single chemical bond. Requirement: It occurs without breaking bonds.. Configuration is the spatial arrangement of bonds in a molecule in a permanent geometry. Requirement: can be changed only by breaking bonds
3- Stereochemistry of the drug A B C C` A` C` A` B`
Example 2: Norephedrine
Example 3: Labetalol