Synthesis of 2-aroylpiperazinyl-4-alkoxyquinazolines by phase-transfer-catalysed heteroaromatic nucleophilic substitution
作者:M. C. GÓmez-Gil、V. GÓmez-Parra、F. SÁnchez、T. Torres
DOI:10.1002/jhet.5570210452
日期:1984.7
A series of quinazolines, with cardiovascular activity, having 2,3-dihydroxypropoxy or 2-hydroxy-3-t- butylaminopropoxy groups substituted at the 4-position and chlorine or 2-aroylpiperazinyl groups at the 2-position have been synthesized. The introduction of the alkoxy substituent at C-4 was carried out under phase-transfer catalysis conditions.
Synthesis of the .beta.-adrenergic blocking agent timolol from optically active precursors
作者:Leonard M. Weinstock、Dennis M. Mulvey、Roger Tull
DOI:10.1021/jo00881a011
日期:1976.9
Leclerc; Amlaiky; Rouot, European Journal of Medicinal Chemistry, 1982, vol. 17, # 1, p. 69 - 74
作者:Leclerc、Amlaiky、Rouot
DOI:——
日期:——
Ponticello, Gerald S.; Engelhardt, Edward L.; Freedman, Mark B., Journal of Heterocyclic Chemistry, 1980, vol. 17, p. 445 - 448
作者:Ponticello, Gerald S.、Engelhardt, Edward L.、Freedman, Mark B.、Baldwin, John J.
DOI:——
日期:——
Urinary metabolites of timolol from humans and laboratory animals. Syntheses and .beta.-adrenergic blocking activities
作者:B. K. Wasson、J. Scheigetz、C. S. Rooney、R. A. Hall、N. N. Share、W. J. A. VandenHeuvel、B. H. Arison、O. D. Hensens、R. L. Ellsworth、D. J. Tocco
DOI:10.1021/jm00185a006
日期:1980.11
Syntheses are reported for three metabolites (2-4) of timolol (1) formed by oxidative metabolism of the morpholine ring. GLC-MS comparisons are presented which establish that the two metabolites whose structures were previously in question are identical with their synthetic counterparts 2 and 3. In 2, metabolic oxidation of the 4-morpholinyl group of 1 had occurred at the carbon next to oxygen to give the 2-hydroxy-4-morpholinyl moiety, whereas in 3, the morpholine of 1 has been oxidized one step further and then ring opened to produce the N-(2-hydroxyethyl)glycine substituent. Biological testing of synthetic samples of the three major metabolites from human urine (3, 4, and 6) indicated that only 4, in which the morpholine moiety has been degraded to a 2-hydroxyethylamino group, had significant beta-adrenergic blocking activity (one-seventh that of timolol in anesthetized dogs).