1,4-Dihydropyridine (DHP) is an organic compound with the formula CH2(CH=CH)2NH. The parent compound is uncommon,[2] but derivatives of 1,4-dihydropyridine are important commercially and biologically. The pervasive cofactors NADH and NADPH are derivatives of 1,4-dihydropyridine. 1,4-Dihydropyridine-based drugs are L-type calcium channel blockers, used in the treatment of hypertension. 1,2-Dihydropyridines are also known.[3][4]
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| Names | |||
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| Preferred IUPAC name
1,4-Dihydropyridine[1] | |||
| Identifiers | |||
3D model (JSmol)
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| ChemSpider | |||
| MeSH | 1,4-dihydropyridine | ||
PubChem CID
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| UNII | |||
CompTox Dashboard (EPA)
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| Properties | |||
| C 5H 7N | |||
| Molar mass | 81.1158 g mol−1 | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Properties and reactions
editA recurring feature of 1,4-dihydropyridines is the presence of substituents at the 2- and 6-positions. Dihydropyridines are enamines, which otherwise tend to tautomerize or hydrolyze.[citation needed]
The dominant reaction of dihydropyridines is their ease of oxidation. In the case of dihydropyridines with hydrogen as the substituent on nitrogen, oxidation yields pyridines:
- CH2(CH=CR)2NH → C5H3R2N + H2
The naturally-occurring dihydropyridines NADH and NADPH contain N-alkyl groups. Therefore, their oxidation does not yield pyridine, but N-alkylpyridinium cations:
- CH2(CH=CR)2NR' → C5H3R2NR' + H−
Hantzsch ester
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See also
editReferences
edit- ^ "1,4-dihydropyridine - Compound Summary". Pubchem Compound. US: National Center for Biotechnology Information. 27 March 2005. Identification and Related Records. Retrieved 1 November 2011.
- ^ Duburs, Gunãrs; Sausins, Alvils (1988). "Synthesis of 1,4-Dihydropyridines by Cyclocondensation Reactions". Heterocycles. 27: 269. doi:10.3987/REV-87-370.
- ^ Stout, David M.; Meyers, A. I. (1982). "Recent advances in the chemistry of dihydropyridines". Chemical Reviews. 82 (2): 223–243. doi:10.1021/cr00048a004.
- ^ Lavilla, Rodolfo (2002). "Recent developments in the chemistry of dihydropyridines". Journal of the Chemical Society, Perkin Transactions 1 (9): 1141–1156. doi:10.1039/B101371H.
- ^ Cheung, Lawrence L. W.; Styler, Sarah A.; Dicks, Andrew P. (2010). "Rapid and Convenient Synthesis of the 1,4-Dihydropyridine Privileged Structure". Journal of Chemical Education. 87 (6): 628–630. Bibcode:2010JChEd..87..628C. doi:10.1021/ed100171g.
External links
edit- Dihydropyridines at the U.S. National Library of Medicine Medical Subject Headings (MeSH)