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17 Cards in this Set
- Front
- Back
Alkanes
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C-C
Nonpolar, Hydrophobic, lipophilic. Halothane is an alkane, Halogen atom is cleaved in metabolism= oxidized carbon atoms. P450 enzyme metabolism often. |
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Alkenes
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C=C Hydrophobic.
Remember cis and trans stereochemestry, plays a moajro role in many drugs. Eg naloxone, vit K: trans, Tamoxifen: Cis Double bond is normally oxidized to form an epoxide. Epoxides can permanently react with nucleophiles in DNA, RNA and amino acids. |
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Alkynes
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Triple Bonded Carbons
Hydrophobic, no extensive metabolism. |
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Aromatics
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Six Carbon ring with three shared double bonds. Found in Asparin, Nicotine, Diazapam. Metabolism resembles alkenes: epoxides form. Some water soluability
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Alcohols
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-OH (hydroxyl)
anything endind in -ol albuterol, propranolol, cholesterol. Soluable in H2O. Metabolism 1 of 2 ways: 1.Oxidized to aldehydes, then carboxylic acids. 2. Conjugation with glucoronic acid or sulfuric acid (many drugs conjugate into glucuronides or sulfates ie Morphine 3-glucoruonide, Demerol. |
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Phenols
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Arene ring with -OH
Acidic, very water soluable, Ex morphine, estradiol, epi. Metabolized by same conjugation as alcohols. |
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Ethers
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C-O-C
increases soluability Eg diphenhydramine, fluoxetine, doxepin. diethylether among first volatile used. (Later became halogenated to give reduced side effects/ flamability) Metabolized by hydroxylation of carbon atom which give hemiacetyl which quickly oxidizes to aldehydes or keytones, The remaining alcohol is metabolized. |
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Thiols/thioesters
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C-S-H
"rotten eggs" Metabolism resembles alchols: Conjugated to form glucoronides. |
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Amines
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C-N--
(nitrogen bound to 3 or 4 atoms. Ammonia =NH3 Lipophilic, Basic, Primary secondary, tertiary, quatrernary lipophilicity and hydrophilicity(phobicity?) go up in this order. Metabolism 1. P450 Monoamine oxidae (MAO) 2 multiple oxidation pathways yeilding dealkylated products. 3.N-oxydation and dealkylation yeilding sulfate formation. Sulfates are highly reactive ie MS metabolite almost as strong as parent compound. |
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Aldehydes
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C-C=O
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Keytones
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key shape
increased water solubility Methadone, corticosterone, Metabolized by reduction of secondary alcohol, then catalyzed by aldo-keto-reductase, then conjugation of alcohol. |
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Carboxylic acids
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Carbonyl-OH
Acidic, highly water souable, Conjugation metabolism to Glucoronide Naproxen ibuprofen ASA glutamate |
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Esters
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Carbonyl-O-C
Cocain, ASA, Acetylcholine, Ester local anesthetics (one i) Metabolysed by enzematic hydrolysis yeilding carboxylic acid and alcohol. Esters have increeases lipophilicity. |
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Amides
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Carbonyl carbon attached to nitrogen. More water soluable than esters.
Metabolism through hydrolysis and N-oxydation. Eg PCN, All "amide" locals have two i's in the name. (amides are mor stable than ester locals due to slower hydrolysis) |
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Sulfonamides
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Metabolized by oxidation
Quite acidic |
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PKA
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The pH at which 50% of the molecules are ionized, and 50% are unionized.
ie HA<=>(A-) + (H+) |
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Acid base Characteristics
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effects Water solubility: oral vs iv drugs.
Polar drugs are hydrophilic (oh and amines) (alkanes and benzenes are lipophilic) |