ChemInform Abstract: New Chiral Titanium Complexes for Enantioselective Reductive Cyclizations of Diimines to trans-2,3-Diarylpiperazines.

ChemInform ◽  
2008 ◽  
Vol 39 (24) ◽  
Author(s):  
Pothiappan Vairaprakash ◽  
Mariappan Periasamy
Keyword(s):  
Titanium Complexes ◽  
Reductive Cyclizations

Synthesis, Spectral Characterization, Antibacterial and Anticancer Activity of some Titanium Complexes

2018 ◽  
Vol 18 (5) ◽  
pp. 739-746 ◽  
Author(s):  
Raj Kaushal ◽  
Nitesh Kumar ◽  
Archana Thakur ◽  
Kiran Nehra ◽  
Pamita Awasthi ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Death ◽  
Anticancer Activity ◽  
Cell Lines ◽  
Spectral Characterization ◽  
Mechanistic Study ◽  
Titanium Complexes ◽  
G0 Phase ◽  
Antibacterial And Anticancer Activity ◽  
Dose Dependent

Abstract: Background: After the discovery of cisplatin, first non platinum anticancer drugs having excellent efficacy were budotitane and TiCl2(cp)2 but action mechanism is not clear. Therefore, we hereby reporting synthesis and biological activities novel titanium complexes to explore their mode of action. Objectives: Synthesis, spectral characterization, antibacterial and anticancer activity of some titanium complexes. Antibacterial studies on various bacterial strains and anticancer studies on HeLa, C6, CHO cancerous cell lines have been performed. Further, the cell death mechanistic study was done on CHO cell lines. Method: Titanium complexes with and without labile groups have been synthesized by reacting of TiCl4 with nitrogen containing ligands viz. 1,2-diaminocyclohexane, 1,10-Phenanthroline, adamantylamine, 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine in predetermined molar ratios. Antibacterial and anticancer studies were performed by agar well diffusion method and MTT assay respectively. Cell cycle analysis is done by using flow cytometry. Results: Complex 2 i.e TiCl2(Phen)2 showed better activity than other complexes as an antibacterial as well as anticancer agent. Phase contrast imaging indicates that observed morphological changes of cells was dose dependent. Cell death mechanistic study have shown the increase in sub G0 phase population as well as formation of blebbing and fragmentation of chromatin material which is an indicative measure of apoptosis. Conclusion: Complex 2 proved to be more effective bactericide and cytotoxic agent. Cell cycle analysis showed cell arrest in G0 phase. Apoptosis percentage was found to increase in a dose dependent manner. So, prepared titanium complexes can be put to use as an important chemotherapeutic agents.

scholarly journals Titanium Complexes with Functional Alkoxido Ligands for Selective Ethylene Dimerization – A High Throughput Experimentation Approach

ChemCatChem ◽  
2021 ◽  
Author(s):  
Fabien L. Grasset ◽  
Richard Welter ◽  
Pierre Braunstein ◽  
Hélène Olivier‐Bourbigou ◽  
Lionel Magna
Keyword(s):  
High Throughput ◽  
Titanium Complexes ◽  
Ethylene Dimerization ◽  
High Throughput Experimentation

scholarly journals Syntheses, characterization, and antibacterial study of titanium complexes

2013 ◽  
Vol 37 ◽  
pp. 936-945 ◽  
Author(s):  
Raj KAUSHAL ◽  
Nitesh KUMAR ◽  
Pamita AWASTHI ◽  
Kiran NEHRA
Keyword(s):  
Titanium Complexes ◽  
Antibacterial Study

scholarly journals Living Polymerization of Propylene with ansa-Dimethylsilylene(fluorenyl)(cumylamido) Titanium Complexes

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 131 ◽  
Author(s):  
Huajin Wang ◽  
Xinwei Wang ◽  
Yanjie Sun ◽  
Hailong Cheng ◽  
Takeshi Shiono ◽  
...  
Keyword(s):  
Living Polymerization ◽  
Titanium Complexes

Ring-opening polymerization of lactones by mono(cyclopentadienyl)titanium complexes

1995 ◽  
Vol 95 (1) ◽  
pp. 195-202 ◽  
Author(s):  
Jun Okuda ◽  
Thomas Kleinhenn ◽  
Peter König ◽  
Insa Taden ◽  
Silvana Ngo ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Titanium Complexes

Hydrothermal Synthesis of Nanosized Titania Photocatalysts Using Novel Water-Soluble Titanium Complexes

2007 ◽  
Vol 124-126 ◽  
pp. 723-726 ◽  
Author(s):  
Makoto Kobayashi ◽  
Koji Tomita ◽  
Valery Petrykin ◽  
Shu Yin ◽  
Tsugio Sato ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Single Phase ◽  
Visible Region ◽  
Water Soluble ◽  
No Oxidation ◽  
Nano Particles ◽  
Titanium Complexes ◽  
Uv Visible

Highly crystalline titania nano-particles were synthesized by hydrothermal method using novel stable water-soluble titanium complexes. It was confirmed that single phase anatase, rutile and brookite, which can be rarely synthesized as a single phase, can be obtained by varying the ligand in the complex and pH of the aqueous solution. TEM observations and BET specific surface area measurements had shown that these samples consisted of nanosized particles of 5~200 nm and had high specific surface areas of 25~150 m2/g. According to UV-visible diffuse reflectance spectra, these titania samples absorbed light in the visible region (λ > 400 nm). Photocatalytic activities in NO oxidation reaction exhibited by synthesized titania powders under the irradiation by UV- visible light were higher than the activity of the commercial TiO2 photocatalyst P25 (Degussa). Especially, under illumination by only visible light of above 510 nm wavelength, photocatalytic activity of the obtained specimens exceeded that of P25 more than four times. We also clearly demonstrated that single phase brookite had high photocatalytic activity for NO oxidation.

On hydroborations of alkenes catalyzed by titanium complexes

1993 ◽  
Vol 34 (43) ◽  
pp. 6817-6820 ◽  
Author(s):  
Kevin Burgess ◽  
Wilfred A van der Donk
Keyword(s):  
Titanium Complexes

Titanium complexes containing tridentate [ONO] type Schiff base ligands for the cycloaddition reaction of CO2 to propylene oxide

Polyhedron ◽  
2018 ◽  
Vol 141 ◽  
pp. 191-197 ◽  
Author(s):  
Young Min Byun ◽  
Ji Min Lee ◽  
Ji Yeon Ryu ◽  
Min Jeong Go ◽  
Kyung Su Na ◽  
...  
Keyword(s):  
Schiff Base ◽  
Propylene Oxide ◽  
Cycloaddition Reaction ◽  
Titanium Complexes ◽  
Schiff Base Ligands
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