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Tricyclic antidepressant
Propizepine
Другие языки:

Propizepine

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Propizepine
Propizepine.png
Clinical data
Trade names Depressin, Vagran
Routes of
administration		 Oral
ATC code
  • none
Legal status
Legal status
  • In general: ℞ (Prescription only)
Identifiers
  • 6-(2-dimethylaminopropyl)-11H-pyrido[3,2-c][1,5]benzodiazepin-5-one
CAS Number
PubChem CID
ChemSpider
UNII
ChEMBL
ECHA InfoCard 100.030.629
Chemical and physical data
Formula C17H20N4O
Molar mass 296.374 g·mol−1

Propizepine (brand names Depressin, Vagran) is a tricyclic antidepressant (TCA) used in France for the treatment of depression which was introduced in the 1970s.

Synthesis

Propizepine synthesis:

Condensation of 2-chloronicotinic acid (2) with o-phenylenediamine (1) leads directly to the tricyclic lactam (3) Although the reaction involves amide formation and nucleophilic aromatic displacement of chlorine, the order of these steps is not known. Alkylation of the anion obtained by treatment if 3 with the 1-chloro-2-dimethylaminopropane (4) affords the antidepressant compound propizepine (5).

The last step in this sequence there is considerable evidence that such alkylations often proceed via the aziridinium ion. Attack of the anion at the secondary or tertiary carbon of the aziridinium ring will lead to different products. Extensive investigation of this problem (e.g. Promethazine, ethopropazine, etc.) has established that the product from attack at secondary carbon usually predominates.

What this intends to say is that even if the chloroamine used is actually 1-dimethylamino-2-chloro-propane, although could still be a mixture of products one still gets predominantly the same reaction product as above and not the "iso" product.


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