Pazinaclone

 ( Cyclopyrrolones ) 

Pazinaclone ( DN-2327) is a sedative and anxiolytic drug in the cyclopyrrolone family of drugs. Some other cyclopyrrolone drugs include zopiclone and eszopiclone.

Pazinaclone has a very similar pharmacological profile to the including sedative and anxiolytic properties, but with less amnestic effects, and at low doses it is a relatively selective anxiolytic, with sedative effects only appearing at higher doses.

Pazinaclone produces its sedative and anxiolytic effects by acting as a partial agonist at GABAA receptor benzodiazepine receptors, although pazinaclone is more subtype-selective than most benzodiazepines.

---

Synthesis Reaction of 2-amino-7-chloro-1,8-naphthyridine with phthalic anhydride leads to the corresponding phthalimide. Selective reduction of one of the imide carbonyl groups in essence converts that to an aldehyde. Condensation with tert-butyl(triphenylphosphoranylidene)acetate gives the Wittig product.

The carboxylic acid is then treated with diethyl cyanophosphonate to convert that to an activated acid cyanide; reaction with 1,4-dioxa-8-azaspiro4.5decane results in formation of the corresponding amide, pazinaclone.

---

See also

• Pagoclone

Post Comment