Title: Alfuzosin
CAS Registry Number: 81403-80-7
CAS Name: N-[3-[(4-Amino-6,7-dimethoxy-2-quinazolinyl)methylamino]propyl]tetrahydro-2-furancarboxamide
Additional Names: N1-(4-amino-6,7-dimethoxyquinazol-2-yl)-N1-methyl-N2-(tetrahydrofuroyl-2)-propylenediamine
Manufacturers' Codes: SL-77.499
Molecular Formula: C19H27N5O4
Molecular Weight: 389.45
Percent Composition: C 58.60%, H 6.99%, N 17.98%, O 16.43%
Literature References: a1-Adrenoceptor antagonist structurally similar to prazosin, q.v. Prepn: P. M. J. Manoury, DE 2904445; idem, US 4315007 (1979, 1982 both to Synthelabo); and antihypertensive activity in rats: P. M. Manoury et al., J. Med. Chem. 29, 19 (1986). Pharmacology: A. G. Ramage, Eur. J. Pharmacol. 129, 307 (1986). HPLC determn in biological fluids: P. Guinebault et al., J. Chromatogr. 353, 361 (1986). Pharmacology in humans: A. H. Deering, Br. J. Clin. Pharmacol. 25, 417 (1988). Clinical evaluation in essential hypertension: S. Leto Di Priolo et al., Eur. J. Clin. Pharmacol. 35, 25 (1988); A. K. Ghosh, S. Ghosh, Ger. Cardiovasc. Med. 1, 81 (1988). Clinical trial in benign prostatic hyperplasia (BPH): C. G. Roehrborn et al., BJU Int. 92, 257 (2003). Review of clinical experience in BPH: D. M. Weiner, F. C. Lowe, Expert Opin. Pharmacother. 4, 2057-2063 (2003).
Derivative Type: Hydrochloride
CAS Registry Number: 81403-68-1
Manufacturers' Codes: SL-77.499-10
Trademarks: Mittoval (Schering AG); Urion (Zambon); UroXatral (Sanofi-Synthelabo); Xatral (Sanofi-Synthelabo)
Molecular Formula: C19H27N5O4.HCl
Molecular Weight: 425.91
Percent Composition: C 53.58%, H 6.63%, N 16.44%, O 15.03%, Cl 8.32%
Properties: Crystals from ethanol + ether, mp 225° (Manoury, 1986), also reported earlier as mp 235° (dec) (Manoury, 1982). pKa 8.13.
Melting point: mp 225° (Manoury, 1986); mp 235° (dec) (Manoury, 1982)
pKa: pKa 8.13
Therap-Cat: Antihypertensive. In treatment of benign prostatic hypertrophy.
Keywords: Antihypertensive; Quinazoline Derivatives; Antiprostatic Hypertrophy; a-Adrenergic Blocker.

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