25
2026
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03
What are the common types of pharmaceutical intermediates?
Author:
Benzene-ring-based intermediates, such as phenol, aniline, and phenylboronic acid derivatives, are widely used in the synthesis of anticancer and cardiovascular drugs.
Heterocyclic intermediates:
Nitrogen-containing heterocycles, such as pyridine, pyrimidine, imidazole, and piperazine, are used in anti-ulcer agents, antihypertensive drugs, and anticancer agents, among others.
Sulfur- or oxygen-containing heterocycles, such as thiophene, furan, and benzofuran, are commonly found in antibacterial and antitumor drugs.
Fluorinated compounds, such as trifluoromethyl aniline and fluorinated pyridines, serve as key intermediates in the synthesis of fluoroquinolone antibiotics, antidepressants (e.g., fluoxetine), and anesthetics (e.g., trifluoroethanol).
Carboxylic acids and their derivatives, such as o-chlorobenzoic acid and p-aminophenol, are used in antipyretic and analgesic drugs (e.g., paracetamol) and penicillin-class antibiotics.
Esters, ethers, and alcohols—such as ethyl acetate and propylene glycol—are used in the synthesis of antibacterial and antifungal agents.
Amine intermediates: such as ethylenediamine and N-benzyl-N-methylethanolamine, used in antihypertensive and antiasthmatic drugs.
Nucleoside/nucleotide intermediates, such as uridine and deoxyribonucleoside triphosphates (dNTPs), are used in antiviral drugs (e.g., zidovudine).
Peptides and amino acid derivatives: serve as the building blocks for peptide-based drugs, such as insulin analogs.
Antibiotic intermediates:
β-Lactams (such as the 7-ACA and 7-ADCA parent nuclei and the phenylacetic acid side chain)
Quinolones, tetracyclines, macrolides, and others
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