CAS 22518-27-0: 4-(4-Chlorophenyl)-2-pyrrolidinone

BACLOFEN IMPURITY A CRS

Lactams, nesoi

4-(4-Chlorophenyl)-2-pyrrolidinone (4CPP) is an anti-convulsant drug that is used to treat epilepsy. It has a high boiling point, allowing it to be used in liquid chromatography methods. 4CPP is also used as a solvent for drugs and excipients in the pharmaceutical industry, and can be obtained through chemical synthesis or by dehydration of butyric acid. The reaction products are trehalose, which is a sugar that prevents the formation of ice crystals, and gabapentin, which is an anti-convulsant drug. 4CPP can be synthesized on an on-line basis using electrospray ionization with a liquid chromatograph/mass spectrometer system. It has been shown to have clinical use in the treatment of epilepsy.

Impurity Baclofen EP Impurity A Applications 4-(4-Chlorophenyl)-2-pyrrolidinone is used in the preparation of potential and selective antagonists of the α1A adrenergic receptor (1,2). It is an impurity of Baclofen (B108000), a specific GABA-B receptor agonist. Muscle relaxant (skeletal). References (1) Whitlock, G. et al.: Bioorg. med. Chem. Lett., 19, 3118 (2009)(2) Brogden, R.N., et al.: Drugs, 8,1 (1974)