Tiamenidine (BAN, USAN, INN, also known as thiamenidine, Hoe 440) is an imidazoline compound that shares many of the pharmacological properties of clonidine. It is a centrally-acting α2 adrenergic receptor agonist (IC50 = 9.1 nM).[2] It also acts as an α1-adrenergic receptor agonist to a far lesser extent (IC50 = 4.85 μM).[2] In hypertensive volunteers, like clonidine, it significantly increased sinus node recovery time and lowered cardiac output.[3] It was marketed (as tiamenidine hydrochloride) by Sanofi-Aventis[4] under the brand name Sundralen[5] for the management of essential hypertension.[6]

Synthesis

Tiamenidine synthesis:[7]

Reaction of thiourea 1 with methyl iodide gives the corresponding S-methyl analogue (2), followed by heating with ethylenediamine, completes the synthesis of tiamenidine (3).

See also

References

  1. ^ Eckert HG, Baudner S, Weimer KE, Wissmann H (1981). "Determination of tiamenidine in biological specimens by radioimmunoassay". Arzneimittel-Forschung. 31 (3): 419–24. PMID 7194666.
  2. ^ a b Timmermans PB, de Jonge A, Thoolen MJ, Wilffert B, Batink H, van Zwieten PA (April 1984). "Quantitative relationships between alpha-adrenergic activity and binding affinity of alpha-adrenoceptor agonists and antagonists". Journal of Medicinal Chemistry. 27 (4): 495–503. doi:10.1021/jm00370a011. PMID 6142954.
  3. ^ Roden DM, Nadeau JH, Primm RK (June 1988). "Electrophysiologic and hemodynamic effects of chronic oral therapy with the alpha 2-agonists clonidine and tiamenidine in hypertensive volunteers". Clinical Pharmacology and Therapeutics. 43 (6): 648–54. doi:10.1038/clpt.1988.90. PMID 2897889. S2CID 44263714.
  4. ^ "Pharmaceutical and healthcare online databases. Tiamenidine Hydrochloride". Drugs-About.com. Retrieved 30 November 2015.
  5. ^ Ganten D, Mulrow PJ, eds. (2013). Pharmacology of Antihypertensive Therapeutics (1st ed.). [S.l.]: Springer-Verlag Berlin Heidelberg. p. 880. ISBN 978-3-642-74211-8.
  6. ^ Zamboulis C, Hossmann V, Dollery CT, Eckert H (October 1979). "Tiamenidine, a centrally acting antihypertensive drug in essential hypertension [proceedings]". British Journal of Clinical Pharmacology. 8 (4): 390P. doi:10.1111/j.1365-2125.1979.tb04737.x. PMID 508528.
  7. ^ US 3758476, 0 Rippel H, Ruschig H, Linder E, Schorr M, issued 1973