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Article ; Online: A quick Chan-Lam C-N and C-S cross coupling at room temperature in the presence of square pyramidal [Cu(DMAP)4I]I as a catalyst.

Roy, Subhasish / Sarma, Manas Jyoti / Kashyap, Bishwapran / Phukan, Prodeep

Chemical communications (Cambridge, England)

2016 Volume 52, Issue 6, Page(s) 1170–1173

Abstract: A rapid and efficient protocol for C-N and C-S cross coupling has been developed using a new square ...

Abstract	A rapid and efficient protocol for C-N and C-S cross coupling has been developed using a new square pyramidal copper complex, [Cu(DMAP)4I]I. The complex was successfully synthesized via a disproportionation reaction of CuI and DMAP in DMSO. The catalytic activity of the complex was found to be excellent for Chan-Lam coupling reaction between aryl boronic acid and amine, amide, azide or thiol. The reaction could be carried out in the presence of only 2 mol% of the copper catalyst in methanol at room temperature within a short time.
Language	English
Publishing date	2016-01-21
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1472881-3
ISSN	1364-548X ; 1359-7345 ; 0009-241X
ISSN (online)	1364-548X
ISSN	1359-7345 ; 0009-241X
DOI	10.1039/c5cc04619j
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Article: A quick Chan–Lam C–N and C–S cross coupling at room temperature in the presence of square pyramidal [Cu(DMAP)₄I]I as a catalyst

Roy, Subhasish / Manas Jyoti Sarma / Bishwapran Kashyap / Prodeep Phukan

Chemical communications. 2016 Jan. 7, v. 52, no. 6

2016

Abstract: A rapid and efficient protocol for C–N and C–S cross coupling has been developed using a new square ...

Abstract	A rapid and efficient protocol for C–N and C–S cross coupling has been developed using a new square pyramidal copper complex, [Cu(DMAP)₄I]I. The complex was successfully synthesized via a disproportionation reaction of CuI and DMAP in DMSO. The catalytic activity of the complex was found to be excellent for Chan–Lam coupling reaction between aryl boronic acid and amine, amide, azide or thiol. The reaction could be carried out in the presence of only 2 mol% of the copper catalyst in methanol at room temperature within a short time.
Keywords	ambient temperature ; azides ; boronic acids ; catalysts ; catalytic activity ; chemical reactions ; copper ; dimethyl sulfoxide ; methanol ; thiols
Language	English
Dates of publication	2016-0107
Size	p. 1170-1173.
Publishing place	The Royal Society of Chemistry
Document type	Article
ZDB-ID	1472881-3
ISSN	1364-548X ; 1359-7345 ; 0009-241X
ISSN (online)	1364-548X
ISSN	1359-7345 ; 0009-241X
DOI	10.1039/c5cc04619j
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Article ; Online: Distribution of glutathione S-transferase T1 and M1 genes polymorphisms in North East Indians: a potential report.

Thoudam, Regina Devi / Yadav, Dhirendra Singh / Mishra, Ashwani Kumar / Kaushal, Mishi / Ihsan, Rakhshan / Chattopadhyay, Indranil / Chauhan, Pradeep Singh / Sarma, Jagannath / Zomawia, Eric / Verma, Yogesh / Nandkumar, A / Mahanta, Jagadish / Phukan, Rupkumar / Kapur, Sujala / Saxena, Sunita

Genetic testing and molecular biomarkers

2010 Volume 14, Issue 2, Page(s) 163–169

Abstract: Background: Detoxifying glutathione S-transferase (GST) gene polymorphisms show variation ...

Abstract	Background: Detoxifying glutathione S-transferase (GST) gene polymorphisms show variation in different ethnic populations. GST detoxifies and metabolizes carcinogens, including oxygen free radicals. GST polymorphisms have been associated with susceptibility to different diseases. In the current study, allelic polymorphisms of GSTM1 and GSTT1 were analyzed in three ethnic groups of North East (NE) India where a high prevalence of various cancers and other diseases such as hypertension, tuberculosis, and asthma have been reported. Methods: We compared the prevalence of GSTT1 and GSTM1 deletion genotypes, which were determined by multiplex polymerase chain reaction, in 422 voluntary, healthy NE Indians with those of other populations. The data was statistically analyzed. Results: The GSTT1-null genotype was found in 51%, 34.3%, and 15.7% of individuals (from Mizoram, Sikkim, and Assam regions of NE India, respectively), whereas the GSTM1-null genotype was found in 46.9%, 46%, and 35% of individuals from the same areas. Conclusions: The NE Indians differ from the rest of the Indian population with reference to genotypic distribution of GST polymorphisms but the frequency was found to be similar to that which has been reported from China. This may explain the hypothesis of the common ancestral origin of both the NE Indians and the Chinese and a higher frequency of cancers such as gastric, esophageal, and oral cancers, which has been reported from these regions. This study establishes baseline frequency data for GST polymorphisms for future case control studies on the role these polymorphisms play with regard to diseases. The results presented here provide the first report on GST polymorphisms in the NE Indian population.
MeSH term(s)	Base Sequence ; DNA Primers/genetics ; Ethnic Groups/genetics ; Female ; Gene Deletion ; Gene Frequency ; Genetic Predisposition to Disease ; Glutathione Transferase/genetics ; Glutathione Transferase/metabolism ; Humans ; Inactivation, Metabolic/genetics ; Inactivation, Metabolic/physiology ; India ; Male ; Neoplasms/enzymology ; Neoplasms/genetics ; Polymorphism, Genetic
Chemical Substances	DNA Primers ; glutathione S-transferase T1 (EC 2.5.1.-) ; Glutathione Transferase (EC 2.5.1.18) ; glutathione S-transferase M1 (EC 2.5.1.18)
Language	English
Publishing date	2010-04
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2486664-7
ISSN	1945-0257 ; 1945-0265
ISSN (online)	1945-0257
ISSN	1945-0265
DOI	10.1089/gtmb.2009.0132
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Article ; Online: Role of household exposure, dietary habits and glutathione S-Transferases M1, T1 polymorphisms in susceptibility to lung cancer among women in Mizoram India.

Phukan, Rup Kumar / Saikia, Bhaskar Jyoti / Borah, Prasanta Kumar / Zomawia, Eric / Sekhon, Gaganpreet Singh / Mahanta, Jagadish

Asian Pacific journal of cancer prevention : APJCP

2014 Volume 15, Issue 7, Page(s) 3253–3260

Abstract: ... dietary habits, smoking and Glutathione S-Transferases M1, T1 polymorphisms on lung cancer among women in Mizoram ...

Abstract	Background: A case-control study was conducted to evaluate the effect of household exposure, dietary habits, smoking and Glutathione S-Transferases M1, T1 polymorphisms on lung cancer among women in Mizoram, India. Materials and methods: We selected 230 newly diagnosed primary lung cases and 460 controls from women in Mizoram. Multivariate logistic regression analysis was performed to estimate adjusted odds ratio (OR). Results: Exposure of cooking oil fumes (p<0.003), wood as heating source for cooking (p=0.004), kitchen inside living room (p=0.001), improper ventilated house (p=0.003), roasting of soda in kitchen (p=0.001), current smokers of tobacco (p=0.043), intake of smoked fish (p=0.006), smoked meat (p=0.001), Soda (p<0.001) and GSTM1 null genotype (p=0.003) were significantly associated with increased risk of lung cancer among women in Mizoram. Significantly protective effect was observed for intake of bamboo shoots (p=<0.001) and egg (p<0.001). A clear increase in dose response gradient was observed for total cooking dish years. Risk for lung cancer tends to increase with collegial effect of indoor environmental sources (p=0.022). Significant correlation was also observed for interaction of GST polymorphisms with some of dietary habits. Conclusions: We confirmed the important role of exposure of cooking oil emission and wood smoke, intake of smoked meat, smoked fish and soda (an alkali preparation used as food additives in Mizoram) and tobacco consumption for increase risk of lung cancer among Women in Mizoram.
MeSH term(s)	Air Pollution, Indoor/adverse effects ; Case-Control Studies ; Cooking ; Environmental Exposure ; Feeding Behavior ; Female ; Genetic Predisposition to Disease ; Glutathione Transferase/genetics ; Humans ; India ; Lung Neoplasms/chemically induced ; Lung Neoplasms/genetics ; Middle Aged ; Polymorphism, Genetic ; Risk Factors ; Sasa/metabolism ; Smoking/adverse effects ; Tobacco Smoke Pollution/adverse effects
Chemical Substances	Tobacco Smoke Pollution ; glutathione S-transferase T1 (EC 2.5.1.-) ; Glutathione Transferase (EC 2.5.1.18) ; glutathione S-transferase M1 (EC 2.5.1.18)
Language	English
Publishing date	2014-05-12
Publishing country	Thailand
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2218955-5
ISSN	2476-762X ; 1513-7368
ISSN (online)	2476-762X
ISSN	1513-7368
DOI	10.7314/apjcp.2014.15.7.3253
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Article ; Online: Polyoxometalates Mediated Amyloid Fibrillation Dynamics and Restoration of Enzyme Activity of Hen Egg White Lysozyme Treated under Cold Atmospheric Pressure Plasma.

Kalita, Kaberi / Phukan, Shankab J / Garai, Somenath / Sankaranarayanan, Kamatchi

ACS omega

2024 Volume 9, Issue 3, Page(s) 3423–3429

Abstract: Neurodegenerative disorders are one of the most devastating disorders worldwide. Although a definite mechanistic pathway of neurodegenerative disorders is still not clear, it is almost clear that these diseases are initiated by protein misfolding. Hen ... ...

Abstract	Neurodegenerative disorders are one of the most devastating disorders worldwide. Although a definite mechanistic pathway of neurodegenerative disorders is still not clear, it is almost clear that these diseases are initiated by protein misfolding. Hen Egg White Lysozyme (Lyz) can be converted to highly arranged amyloid fibrils and is therefore considered a good model protein for studying protein aggregation in connection to neurodegeneration. In this study, Lyz has been converted to fibrils using He-air gas fed single jet cold atmospheric plasma (CAP). The reactive oxygen species and the reactive nitrogen species produced by the plasma jet interact with the protein molecules and enhance the fibril formation. We monitored the fibrillation kinetics with the Thioflavin T (ThT) assay and observed that fibrils are formed when the samples are treated for 10 min with He-air gas fed CAP. Further, we studied the role of a special class of inorganic nanomaterials called polyoxometalates (POMs) in the process of the Lyz fibrillation using various biophysical techniques. The Keggin POMs used in this study are phosphomolybdic acid (PMA) and silico molybdic acid (SMA). Keggin POMs bring in structural self-assembly of the protein and disrupt the fibrils as evidenced in the ThT assay and TEM analysis. Molecular docking studies together with electrokinetic potential studies show the interactions between POMs and Lyz dominated via hydrogen bonding and electrostatic interactions. The enzyme activity of Lyz was assessed using the substrate
Language	English
Publishing date	2024-01-08
Publishing country	United States
Document type	Journal Article
ISSN	2470-1343
ISSN (online)	2470-1343
DOI	10.1021/acsomega.3c06921
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Article ; Online: Metal-Free Visible-Light Catalytic Deoxygenation of Azaaryl N-Oxides: Harnessing Photons for Efficient Greener Synthesis.

Mandal, Susanta / Phukan, Kimron Protim / Basumatary, Joneswar / Roy, Biswajit Gopal

Chemistry, an Asian journal

2024 , Page(s) e202400147

Abstract: Regio- and chemo-selective functionalization of electron deficient azaarenes often required their transformations to corresponding N-oxides and subsequent removal of oxygen after functionalization to get back the desired substituted azaarenes. An ... ...

Abstract	Regio- and chemo-selective functionalization of electron deficient azaarenes often required their transformations to corresponding N-oxides and subsequent removal of oxygen after functionalization to get back the desired substituted azaarenes. An efficient metal-free visible-light photo-redox catalytic deoxygenation of N-oxides of azaheterocyclic compounds has been developed using acridinium based organo-photocatalyst in blue LED light. High efficiency and mildness of this methodology has been demonstrated through higher deoxygenation yield of wide variety of azaheterocyclic N-oxides with reactive functional groups. Robustness of the photocatalytic reduction has been demonstrated through easy scaling-up of the reaction to gram level without much change in the reaction yield.
Language	English
Publishing date	2024-04-05
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2233006-9
ISSN	1861-471X ; 1861-4728
ISSN (online)	1861-471X
ISSN	1861-4728
DOI	10.1002/asia.202400147
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Article ; Online: Statistical modelling, optimization, and mechanistic exploration of novel ureolytic Enterobacter hormaechei IITISM-SA3 in cadmium immobilization under microbial inclusive and cell-free conditions through microbially induced calcite precipitation.

Anand, Saumya / Kumar, Vipin / Singh, Ankur / Phukan, Dixita / Pandey, Nishant

Environmental pollution (Barking, Essex : 1987)

2024 Volume 348, Page(s) 123880

Abstract: The study aimed to evaluate the potential of a novel isolated ureolytic Enterobacter hormaechei IITISM-SA3 in cadmium bioremoval through MICP. The optimization and modelling of the biotic and abiotic factors affecting the process of mineralization were ... ...

Abstract	The study aimed to evaluate the potential of a novel isolated ureolytic Enterobacter hormaechei IITISM-SA3 in cadmium bioremoval through MICP. The optimization and modelling of the biotic and abiotic factors affecting the process of mineralization were also performed. In addition, the underlying mechanism of MICP-driven Cd mineralization under microbial-inclusive and cell-free conditions was revealed and supported through the characterization of the bio-precipitates obtained using various characterization techniques. The results indicated that the isolate could remove 97.18% Cd
MeSH term(s)	Calcium Carbonate/chemistry ; Cadmium/chemistry ; Chemical Precipitation ; Carbonates/chemistry ; Enterobacter
Chemical Substances	Calcium Carbonate (H0G9379FGK) ; Cadmium (00BH33GNGH) ; Carbonates
Language	English
Publishing date	2024-03-28
Publishing country	England
Document type	Journal Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2024.123880
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Article ; Online: Genetic polymorphism of glutathione S-transferases M1 and T1, tobacco habits and risk of stomach cancer in Mizoram, India.

Malakar, Mridul / Devi, K Rekha / Phukan, Rup Kumar / Kaur, Tanvir / Deka, Manab / Puia, Lalhriat / Barua, Debajit / Mahanta, Jagadish / Narain, Kanwar

Asian Pacific journal of cancer prevention : APJCP

2012 Volume 13, Issue 9, Page(s) 4725–4732

Abstract: Aim: The incidence of stomach cancer in Mizoram is highest in India. We have conducted a population based matched case-control study to identify environmental and genetic risk factors in this geographical area.: Methods: A total of 102 histologically ...

Abstract	Aim: The incidence of stomach cancer in Mizoram is highest in India. We have conducted a population based matched case-control study to identify environmental and genetic risk factors in this geographical area. Methods: A total of 102 histologically confirmed stomach cancer cases and 204 matched healthy population controls were recruited. GSTM1 and GSTT1 genotypes were determined by PCR and H. pylori infections were determined by ELISA. Results: Tobacco-smoking was found to be an important risk factor for high incidence of stomach cancer in Mizoram. Meiziol (local cigarette) smoking was a more important risk factor than other tobacco related habits. Cigarette, tuibur (tobacco smoke infused water) and betel nut consumption synergistically increased the risk of stomach cancer. Polymorphisms of GSTM1 and GSTT1 genes were not found to be directly associated with stomach cancer in Mizoram. However, they appeared to be effect modifiers. Persons habituated with tobacco smoking and/or tuibur habit had increased risk of stomach cancer if they carried the GSTM1 null genotype and GSTT1 non-null genotype. Conclusion: Tobacco smoking, especially meiziol is the important risk factor for stomach cancer in Mizoram. GSTM1 and GSTT1 genes modify the effect of tobacco habits. This study is a first step in understanding the epidemiology of stomach cancer in Mizoram, India.
MeSH term(s)	Aged ; Areca/adverse effects ; Beverages/adverse effects ; Case-Control Studies ; Confidence Intervals ; Female ; Genotype ; Glutathione Transferase/genetics ; Helicobacter Infections/complications ; Helicobacter pylori ; Humans ; India/epidemiology ; Male ; Middle Aged ; Odds Ratio ; Polymorphism, Genetic ; Risk Factors ; Smoking/adverse effects ; Stomach Neoplasms/epidemiology ; Stomach Neoplasms/etiology
Chemical Substances	Glutathione Transferase (EC 2.5.1.18) ; glutathione S-transferase M1 (EC 2.5.1.18) ; glutathione transferase T1-1, human (EC 2.5.1.18)
Language	English
Publishing date	2012-11-15
Publishing country	Thailand
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2218955-5
ISSN	2476-762X ; 1513-7368
ISSN (online)	2476-762X
ISSN	1513-7368
DOI	10.7314/apjcp.2012.13.9.4725
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Article ; Online: Skeletally substituted aluminium and gallium carbenoids: a computational exploration.

Ahmed, Sahtaz / Fernández, Israel / Phukan, Ashwini K

Dalton transactions (Cambridge, England : 2003)

2023 Volume 52, Issue 25, Page(s) 8567–8579

Abstract: Comprehensive computational investigations were carried out to understand the electronic and ligand properties of skeletally substituted β-diketiminate stabilized Al(I) and Ga(I) carbenoids as well as to probe their potential in small molecule activation. ...

Abstract	Comprehensive computational investigations were carried out to understand the electronic and ligand properties of skeletally substituted β-diketiminate stabilized Al(I) and Ga(I) carbenoids as well as to probe their potential in small molecule activation. All of the proposed group 13 carbenoids possess a stable singlet ground state, and the majority of them have a significantly enhanced electron donation ability compared to the experimentally reported systems. The evaluation of the energetics associated with the splitting of various strong bonds such as H-H, N-H, C-F, and B-H by these carbenoids indicates that many of the proposed Al and Ga carbenoids may be considered as suitable candidates for small molecule activation.
Language	English
Publishing date	2023-06-27
Publishing country	England
Document type	Journal Article
ZDB-ID	1472887-4
ISSN	1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
ISSN (online)	1477-9234 ; 1364-5447
ISSN	0300-9246 ; 1477-9226
DOI	10.1039/d3dt00631j
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Article ; Online: Unanticipated switch of reactivity of isonitrile via N≡C bond scission: Cascade formation of symmetrical sulfonyl guanidine.

Mishra, Debashish / Rajkhowa, Sagarika / Phukan, Prodeep

iScience

2023 Volume 26, Issue 8, Page(s) 107258

Abstract: Unanticipated formation of symmetrical sulfonyl guanidine was observed while treating isonitriles ... ...

Abstract	Unanticipated formation of symmetrical sulfonyl guanidine was observed while treating isonitriles with
Language	English
Publishing date	2023-07-03
Publishing country	United States
Document type	Journal Article
ISSN	2589-0042
ISSN (online)	2589-0042
DOI	10.1016/j.isci.2023.107258
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