title: Synthesis and in vitro antiproliferative activity of 5-alkyl-12(H)-quino[3,4-b] [1,4]benzothiazinium salts.
abstract: A novel method of synthesizing 1,4-thiazine ring has led to the series of 5-alkyl-12(H)-quino[3,4-b][1,4]benzothiazinium salts. The derivatives containing a butyl or decyl substituents on the quinoline nitrogen atom were obtained by alkylation of 12(H)-quino[3,4-b][1,4]benzothiazine with alkyl bromides. Antiproliferative activity in vitro of the compounds (3) was assessed using two cancer cell lines (Hct116 and LLC) and doxorubicin as a reference. Most of the studied phenothiazine derivatives showed activity against both cell lines investigated (2.2-19.6 μg/mL concentration range). A structure-activity relationship was established. Only the compounds with substituents in the 11-position of the quinobenzothiazine ring did not exhibit activity against either cell line.
authors.affiliation: Department of Organic Chemistry, Medical University of Silesia, ul. Jagiellońska 4, 41-200 Sosnowiec, Poland. zieba@edu.sum.pl
authors.forename: Andrzej
authors.initials: A
authors.lastname: Zięba
authors.forename: Aleksander
authors.initials: A
authors.lastname: Sochanik
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Szurko
authors.forename: Marzena
authors.initials: M
authors.lastname: Rams
authors.forename: Anna
authors.initials: A
authors.lastname: Mrozek
authors.forename: Piotr
authors.initials: P
authors.lastname: Cmoch
mesh_terms: D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013329:Structure-Activity Relationship; D013843:Thiazines / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D013843:Thiazines