Moracizine
- B (U.S.)
- C01BG01 (WHO)
- ethyl [10-(3-morpholin-4-ylpropanoyl)-10H-phenothiazin-2-yl]carbamate
- 31883-05-3 Y
- 34633
- 7244
- DB00680 N
- 31872 Y
- 2GT1D0TMX1
- D05077 Y
- CHEBI:6997 Y
- ChEMBL1075 Y
- DTXSID4023335
- Interactive image
- O=C(OCC)Nc2cc1N(c3c(Sc1cc2)cccc3)C(=O)CCN4CCOCC4
- InChI=1S/C22H25N3O4S/c1-2-29-22(27)23-16-7-8-20-18(15-16)25(17-5-3-4-6-19(17)30-20)21(26)9-10-24-11-13-28-14-12-24/h3-8,15H,2,9-14H2,1H3,(H,23,27) Y
- Key:FUBVWMNBEHXPSU-UHFFFAOYSA-N Y
Moracizine[1] or moricizine, sold under the trade name Ethmozine, is an antiarrhythmic of class IC.[2] It was used for the prophylaxis and treatment of serious and life-threatening ventricular arrhythmias,[3] but was withdrawn in 2007 for commercial reasons.[4]
Pharmacology
Moracizine, a phenothiazine derivative, undergoes extensive first-pass metabolism and is also extensively metabolized after it has entered the circulation. It may have pharmacologically active metabolites. A clinical study has shown that moracizine is slightly less effective than encainide or flecainide in suppressing ventricular premature depolarizations.[citation needed] Compared with disopyramide and quinidine, moracizine was equally or more effective in suppressing premature ventricular contractions, couplets, and nonsustained ventricular tachycardia.[citation needed]
In the Cardiac Arrhythmia Suppression Trial (CAST), a large study testing the influence of antiarrhythmics on mortality, showed a statistically non-significant increase of mortality from 5.4 to 7.2% under moracizine. This is in line with other class IC antiarrhythmics.[5]
Synthesis
Note: The carbamate structure reminds the reader of Gastrophenzine or particularly Ethacizine.
The amide formation between Phenothiazine-2-ethylcarbamate [37711-29-8] (1) and 3-Chloropropionyl chloride [625-36-5] (2) gives ethyl N-[10-(3-chloropropanoyl)phenothiazin-2-yl]carbamate [119407-03-3] [34749-22-9] (3). Displacement of the remaining ω-halogen by morpholine (4) then completes the synthesis of Moricizine (5).
References
- ^ "The use of stems in the selection of International Nonproprietary Names (INN) for pharmaceutical substances" (PDF). World Health Organization. 2009. p. 103.
- ^ Ahmmed GU, Hisatome I, Kurata Y, Makita N, Tanaka Y, Tanaka H, et al. (March 2002). "Analysis of moricizine block of sodium current in isolated guinea-pig atrial myocytes. Atrioventricular difference of moricizine block". Vascular Pharmacology. 38 (3): 131–41. doi:10.1016/S1537-1891(02)00213-6. PMID 12402511.
- ^ British National Formulary (59th ed.). British Medical Journal Publishing Group, Pharmaceutical Press. 2010.
- ^ "Shire Announces Ethmozine will be Available until December 31, 2007". Heart Rhythm Society. Archived from the original on December 10, 2011. Retrieved January 12, 2012.
- ^ Cardiac Arrhythmia Suppression Trial II Investigators (July 1992). "Effect of the antiarrhythmic agent moricizine on survival after myocardial infarction". The New England Journal of Medicine. 327 (4): 227–33. doi:10.1056/NEJM199207233270403. PMID 1377359.
- ^ Gritsenko, A.N., Ermakova, Z.I. & Zhuravlev, S.V. Pharm Chem J (1972) 6: 575.
- ^ Anna Nikitichna Gritsenko, 5 More », U.S. patent 3,740,395 (1973).
- ^ Gary O. Page, U.S. patent 5,202,435 (1993 to Roberts Laboratories Inc, Bristol Myers Squibb Pharma Co).
- ^ L.P. Nikitenkov, et al. RU 2159771 (2000 to).
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class I (Na+ channel blockers) |
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class III (Phase 3→, K+ channel blockers) | |||||||
class IV (Phase 4→, Ca2+ channel blockers) |
and antagonists
class II (Phase 4→, β blockers) |
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A1 agonist | |
M2 | |
α receptors |
Na+/ K+-ATPase |
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- #WHO-EM
- ‡Withdrawn from market
- Clinical trials:
- †Phase III
- §Never to phase III
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