Chemistry:Tybamate
Tybamate (INN; Solacen, Tybatran, Effisax) is an anxiolytic of the carbamate family.[1] It is a prodrug for meprobamate in the same way as the better known drug carisoprodol. It has liver enzyme inducing effects similar to those of phenobarbital but much weaker.[2]
As the trade name Tybatran (Robins), it was formerly available in capsules of 125, 250, and 350 mg, taken 3 or 4 times a day for a total daily dosage of 750 mg to 2 g. The plasma half-life of the drug is three hours. At high doses in combination with phenothiazines, it could produce convulsions.[3]
Synthesis
Catalytic hydrogenation of 2-methyl-2-pentenal (1) gives the aldehyde 2-methylpentanal (2). Treatment with formaldehyde gives a crossed Cannizzaro reaction yielding 2,2-bis(hydroxymethyl)pentane (3). Cyclisation of this diol with diethyl carbonate gives (4), which reacts with ammonia to provide the carbamate (5). Lastly, treatment with butyl isocyanate (6) produces tybamate.[4][5][6]
References
- ↑ Index Nominum 2000: International Drug Directory. Taylor & Francis. January 2000. p. 1077. ISBN 978-3-88763-075-1. https://books.google.com/books?id=5GpcTQD_L2oC&pg=PA634.
- ↑ "The comparative potency of phenobarbital and five 1,3-propanediol dicarbamates for hepatic cytochrome P450 induction in rats". Research Communications in Chemical Pathology and Pharmacology 48 (3): 467–70. June 1985. PMID 4023427.
- ↑ American Medical Association Dept of Drugs (1977). AMA Drug Evaluations (3rd ed.). Littleton, Mass.: Pub. Sciences Group. p. 406. ISBN 978-0-88416-175-2. OCLC 1024170745.
- ↑ "Some Anticonvulsant Agents Derived from 1,3-Propanediols". Journal of the American Chemical Society 73 (12): 5779–5781. 1951. doi:10.1021/ja01156a086. Bibcode: 1951JAChS..73.5779L.
- ↑ Tybamate. Analytical Profiles of Drug Substances. 4. 1975. pp. 494–515. doi:10.1016/S0099-5428(08)60025-8. ISBN 978-0-12-260804-9.
- ↑ "Tybamate". Pharmaceutical Substances. Thieme. https://pharmaceutical-substances.thieme.com/ps/search-results?docUri=KD-20-0207.
 |  |
