title: Substituted quinazolines, part 2. Synthesis and in-vitro anticancer evaluation of new 2-substituted mercapto-3H-quinazoline analogs.
abstract: A new series of 2-substituted mercapto-3H-quinozolines bearing 6-iodo and 2-heteroarylthio functions was synthesized and screened for their in vitro antitumor activity. Eighteen compounds were identified as active anticancer agents. N'-[(3-Benzyl-4-oxo-6-iodo-3H-quinazoline-2-yl)thioacetyl]-N(3)-ethylthiosemicarbazide (10), N-benzoyl-N'-[2-(3-benzyl-4-oxo-6-iodo-3H-quinozolin-2-yl)thioacetyl]hydrazine (12), and 2-[(3, 6-dioxo-pyridazin-4-yl)thio]-3-benzyl-4-oxo-6-iodo-3H-quinazoline (20) proved to be the most active members in this study. They showed MG-MID, GI(50) values of 12.8, 11.3, and 13.8 microM, respectively. The detailed synthesis and biological screening data are reported.
authors.affiliation: Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Ashraf A
authors.initials: AA
authors.lastname: Khalil
authors.forename: Sami G
authors.initials: SG
authors.lastname: Abdel-Hamide
authors.forename: Abdulrahman M
authors.initials: AM
authors.lastname: Al-Obaid
authors.forename: Hussein I
authors.initials: HI
authors.lastname: El-Subbagh
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D020128:Inhibitory Concentration 50; D009682:Magnetic Resonance Spectroscopy; D011799:Quinazolines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship; D013438:Sulfhydryl Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D011799:Quinazolines; D013438:Sulfhydryl Compounds