2273. Cilazapril

Nomenclature

CAS number: 88768-40-5
(1S,9S)-9-[[(1S)-1-(Ethoxycarbonyl)-3-phenylpropyl]amino]octahydro-10-oxo-6H-pyridazino[1,2-a][1,2]diazepine-1-carboxylic acid; (1S,9S)-9-[[(S)-1-carboxy-3-phenylpropyl]amino]octahydro-10-oxo-6H-pyridazino[1,2-a][1,2]diazepine-1-carboxylic acid 9-ethyl ester; Ro-31-2848; Dynorm (Roche).
C22H31N3O5; mol wt 417.50.
C 63.29%, H 7.48%, N 10.06%, O 19.16%.

Description and references

Angiotensin-converting enzyme (ACE) inhibitor; hydrolyzed in vivo to the active diacid metabolite. Prepn: M. R. Attwood et al., DE 3317290; eidem, US 4512924 (1983, 1985 both to Hoffmann-La Roche); eidem, J. Chem. Soc. Perkin Trans. 1 1986, 1011. HPLC determn in urine and pharmaceutical formulations: J. A. Prieto et al., J. Chromatogr. B 714, 285 (1998). Pharmacology: I. L. Natoff et al., J. Cardiovasc. Pharmacol. 7, 569 (1985). Review of clinical pharmacology: C. H. Kleinbloesem et al., Am. J. Med. 87, Suppl. 6B, 45S-49S (1989). Review of clinical experience in hypertension: T. Szucs, Drugs 41, Suppl. 1, 18-24 (1991); in chronic heart failure: L. D"ossegger et al., J. Cardiovasc. Pharmacol. 24, Suppl. 3, S38-S41 (1994); in combination with hydrochlorothiazide: R. C. Pordy, Cardiology 86, 41-48 (1995).

Chemical structure

Derivative

Monohydrate.

Nomenclature

CAS number: 92077-78-6
Inhibace (Roche); Initiss (Pharmacia); Justor (Chiesi); Vascace (Roche).
C22H31N3O5.H2O; mol wt 435.51.
C 60.67%, H 7.64%, N 9.65%, O 22.04%.

Properties

White to off-white crystalline powder, mp 98° (dec). [α]D20 -62.51° (c = 1% in ethanol). Soly in water (25°): 0.5 g/100 ml. pKa1 3.3; pKa2 6.4. Partition coefficient (octanol/pH 7.4 buffer, 22°): 0.8.

Derivative

Diacid.

Nomenclature

CAS number: 90139-06-3
Cilazaprilat; Ro-31-3113.
C20H27N3O5; mol wt 389.45.
C 61.68%, H 6.99%, N 10.79%, O 20.54%.

Properties

Crystals from water, mp 242°. [α]D20 -74.7° (c = 0.5 in 1M NaOH).

Therapeutic Category

Antihypertensive.

Keywords

ACE-Inhibitor; Antihypertensive; N-Carboxyalkyl (peptide/lactam) Derivatives