Diaminopyrimidine
Encyclopedia
Diaminopyrimidines are a class of organic chemical compounds that include two amine
Amine
Amines are organic compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are derivatives of ammonia, wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group. Important amines include amino acids, biogenic amines,...

 groups on a pyrimidine
Pyrimidine
Pyrimidine is a heterocyclic aromatic organic compound similar to benzene and pyridine, containing two nitrogen atoms at positions 1 and 3 of the six-member ring...

 ring.

They include many dihydrofolate reductase inhibitor
Dihydrofolate reductase inhibitor
A dihydrofolate reductase inhibitor is a molecule that inhibits the function of dihydrofolate reductase, and is a type of antifolate.Since folate is needed by rapidly dividing cells to make thymine, this effect may be used to therapeutic advantage. For example, methotrexate is used as cancer...

 drug
Drug
A drug, broadly speaking, is any substance that, when absorbed into the body of a living organism, alters normal bodily function. There is no single, precise definition, as there are different meanings in drug control law, government regulations, medicine, and colloquial usage.In pharmacology, a...

s (such as pyrimethamine
Pyrimethamine
Pyrimethamine is a medication used for protozoal infections. It is commonly used as an antimalarial drug , and is also used in the treatment of Toxoplasma gondii infections in immunocompromised patients, such as HIV-positive individuals.-Mechanism of action:Pyrimethamine interferes with...

, trimetrexate
Trimetrexate
Trimetrexate is a quinazoline derivative. It is a dihydrofolate reductase inhibitor.-Uses:It has been used with leucovorin in treating pneumocystis pneumonia.It has been investigated for use in treating leiomyosarcoma....

, and piritrexim  and the antibiotic
Antibiotic
An antibacterial is a compound or substance that kills or slows down the growth of bacteria.The term is often used synonymously with the term antibiotic; today, however, with increased knowledge of the causative agents of various infectious diseases, antibiotic has come to denote a broader range of...

s Iclaprim
Iclaprim
Iclaprim , codenamed AR-100 and RO-48-2622, is a diaminopyrimidine dihydrofolate reductase inhibitor being developed for the treatment of complicated skin and soft tissue infections caused by antibiotic-resistant bacteria. It is structurally related to trimethoprim...

 and trimethoprim
Trimethoprim
Trimethoprim is a bacteriostatic antibiotic mainly used in the prophylaxis and treatment of urinary tract infections.It belongs to the class of chemotherapeutic agents known as dihydrofolate reductase inhibitors...

).

Some have been patented as anti-cancer drugs.
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