Chlormezanone

Clinical data
AHFS/Drugs.com	International Drug Names
Routes of administration	Oral
ATC code	M03BB02 (WHO)
Legal status
Legal status	In general: ℞ (Prescription only)
Pharmacokinetic data
Elimination half-life	40.5 hours
Identifiers
IUPAC name 2-(4-chlorophenyl)-3-methyl-1,1-dioxo-1,3-thiazinan-4-one
CAS Number	80-77-3 Y
PubChem CID	2717
IUPHAR/BPS	7323
DrugBank	DB01178 Y
ChemSpider	2616 Y
UNII	GP568V9G19
KEGG	D00268 Y
ChEBI	CHEBI:3619 Y
ChEMBL	ChEMBL1200714 N
CompTox Dashboard (EPA)	DTXSID3022798
ECHA InfoCard	100.001.190
Chemical and physical data
Formula	C11H12ClNO3S
Molar mass	273.73 g·mol−1
3D model (JSmol)	Interactive image
SMILES O=S1(CCC(N(C)C1C2=CC=C(C=C2)Cl)=O)=O
InChI InChI=1S/C11H12ClNO3S/c1-13-10(14)6-7-17(15,16)11(13)8-2-4-9(12)5-3-8/h2-5,11H,6-7H2,1H3 Y Key:WEQAYVWKMWHEJO-UHFFFAOYSA-N Y
NY (what is this?)  (verify)

Chlormezanone (marketed under the brandname Trancopal or Fenaprim) is a drug used as an anxiolytic and a muscle relaxant.

Its use was discontinued in many countries from 1996 on, due to rare but serious cases of toxic epidermal necrolysis.

Synthesis

Chlormezanone synthesis

• Sterling Drug Inc., US 3082209  (1958).
• Surrey, A. R.; Webb, W. G.; Gesler, R. M. (1958). "Central Nervous System Depressants. The Preparation of Some 2-Aryl-4-metathiazanones". Journal of the American Chemical Society. 80 (13): 3469. doi:10.1021/ja01546a065.