Microwave Irradiation for Accelerating each Step for the Synthesis of 1,2,4-Triazino[5,6-b]indole-3-thiolsand their Derivatives from Isatin and 5-Chloroisatin
This work describes the synthesis of spiro 1,3,4‐thiadiazolines from isatin‐β‐thiosemicarbazone acetylation, using microwave irradiation as a source of heating the reaction medium. N‐substituted isatin derivatives were used as substrates to obtain thiosemicarbazones by adding thiosemicarbazide to the isatin ketone carbonyl. The final synthetic step was the reaction of thiosemicarbazones with acetic
New mononuclear Ru(II) complexes [Ru(A)(2)(B)](2+), where A=2,2-bipyridine/1,10-phenanthroline and B=3,4,5-tri-OCH3-DPC, 4-CH3-DPC, 4-N(CH3)(2)-DPC, 4-NO2-DPC, N-BITSZ, PTSZ and PINH, were prepared and characterized by spectroscopic methods. The in vitro cytotoxic activities of the complexes and their corresponding ligands were investigated against the human cancer T-lymphocyte cell lines molt 4/c8 and CEM and the murine tumor leukemia cell line L1210, human promyelocytic leukemia cells (HL-60) and Bel-7402 liver cancer cells by MTT assay. The complexes [Ru(A)(2)(B)](2+) (A=1,10-phenanthroline, B=3,4,5-tri-OCH3-DPC) exerts rather more potent activities against all of these cell lines, especially for CEM and L1210. Ru complexes and structure-activity relationships and anticancer mechanisms are also discussed.