882523-91-3Relevant academic research and scientific papers
Synthesis and photophysical properties of polycarbo-substituted quinazolines derived from the 2-Aryl-4-chloro-6-iodoquinazolines
Mphahlele, Malose Jack,Paumo, Hugues Kamdem,Rhyman, Lydia,Ramasami, Ponnadurai
, p. 14656 - 14683 (2015/09/21)
The reactivity of the 2-aryl-4-chloro-6-iodoquinazolines towards palladium catalyzed sequential (Sonogashira/Suzuki-Miyaura) and one-pot two-step cross-coupling (bis-Sonogashira, and successive Sonogashira/Stille) reactions to afford novel unsymmetrical polycarbo-substituted quinazolines has been evaluated. In contrast to the chloro-bromo substituted quinazolines in which selectivity has been previously found to generally favor substitution at the more activated C(4)-Cl bond over the weaker Csp2-Br bond, substitution in the case of the chloro-iodo derivatives favors cross-coupling through the intrinsically more reactive Csp2-I bond. The electronic absorption and emission properties of the prepared 2,3-diaryl-6-(phenylethynyl)quinazolines were studied in solvents of different polarity (dichloromethane, toluene, DMF, methanol) and CH2Cl2-TFA mixture using UV-Vis and emission spectroscopic techniques complemented with density functional theory method to establish the effect of substituents on intramolecular charge transfer properties.
Synthesis, analgesic and anti-inflammatory evaluation of some novel quinazoline derivatives
Alafeefy, Ahmed M.,Kadi, Adnan A.,Al-Deeb, Omar A.,El-Tahir, Kamal E.H.,Al-Jaber, Nabila A.
scheme or table, p. 4947 - 4952 (2010/11/20)
Two series of some new 2,4,6-trisubstituted-quinazoline derivatives were prepared and screened for their analgesic, anti-inflammatory activity and acute toxicity. Four compounds were more potent analgesic agents than the reference drug Indomethacin and thirteen compounds showed significant anti-inflammatory activity. Seven compounds showed combined ability to inhibit both pain and inflammation. Compounds tested for acute toxicity showed no toxic symptoms or mortality rates 24 h post-administration implying their good safety margin.
