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Dinuclear Cu-I complexes of pyridyl-diazadiphosphetidines and aminobis(phosphonite) ligands: synthesis, structural studies and antiproliferative activity towards human cervical, colon carcinoma and breast cancer cells

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Title Dinuclear Cu-I complexes of pyridyl-diazadiphosphetidines and aminobis(phosphonite) ligands: synthesis, structural studies and antiproliferative activity towards human cervical, colon carcinoma and breast cancer cells
 
Creator RASHID, A
ANANTHNAG, GS
NAIK, S
MAGUE, JT
PANDA, D
BALAKRISHNA, MS
 
Subject HETEROCYCLIC CARBENE COMPLEXES
COPPER(I) COMPLEXES
ANTITUMOR-ACTIVITY
METAL-COMPLEXES
ANTICANCER AGENTS
ANTIINFLAMMATORY DRUGS
KINETIC STABILIZATION
MICROTUBULE DYNAMICS
BIOLOGICAL-ACTIVITY
CHEMICAL NUCLEASE
 
Description The copper(I) complexes containing phosphorus donor ligands such as diazadiphosphetidine, cis-{(o-OCH2C5H4N)P(mu-(NBu)-Bu-t)}(2) (1) and aminobis(phosphonite), C6H5N{P(OC6H3(OMe-o)(C3H5-p))(2)}(2) (2, PNP), have been synthesized. Treatment of 1 with copper iodide afforded the 1D coordination polymer [{Cu(mu-I)}(2){(o-OCH2C5H4N)P(mu-(NBu)-Bu-t)}(2)](n) (3). Treatment of 3 with 2,2'-bipyridine (bpy) and 1,10-phen-anthroline (phen) produced mixed-ligand complexes [(L)(2)Cu-2{(o-OCH2C5H4N)P(mu-(NBu)-Bu-t)}(2)][I](2) (4 L = bpy; 5 L = phen) in good yields. The reaction of 2 with copper iodide yielded a rare tetranuclear copper complex [(CuI)(2)C6H5N(PR2)(2)](2) (6), which on subsequent treatment with various pyridyl ligands produced binuclear complexes [{Cu(mu-I)(py)}(2)(mu-PNP)] (7), [Cu-2(mu-I)(bpy)(2)(mu-PNP)]I (8), [Cu-2(mu-I)I(bpy)(mu-PNP)] (9), [Cu-2(phen)(bpy)(mu-PNP)](OTf)(2) (10), [Cu-2(mu-I)I(phen)(mu-PNP)] (11) and [Cu-2(mu-I(phen)(2)(mu-PNP)]I (12), in an almost quantitative yield. The new copper(I) complexes (4, 5 and 7-12) were tested for anti-cancer activity against three human tumor cell lines. Compounds 5, 10 and 12 showed in vitro antitumor activity 5-7 fold higher than cisplatin, the most used anticancer drug. These three most potent compounds (5, 10 and 12) were chosen for detailed study to understand their mechanism of action. The copper(I) compounds studied in the present investigation were found to inhibit tumor cell growth by arresting cells at the S-phase of the cell cycle. The characteristic nuclear morphology of treated cells showed signs of DNA damage. The experimental evidence clearly indicated that these compounds initiated apoptosis, which is mediated through the p53 pathway.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-28T12:19:16Z
2014-12-28T12:19:16Z
2014
 
Type Article
 
Identifier DALTON TRANSACTIONS, 43(29)11339-11351
1477-9226
1477-9234
http://dx.doi.org/10.1039/c4dt00832d
http://dspace.library.iitb.ac.in/jspui/handle/100/16488
 
Language English