Sunday, 18 September 2016

Synthesis and Antifungal Activity Against Candida Strains of Mesoionic System Derived From 1,3-Thyazolium-5-thiolate

General procedure for the preparation of ten newly synthetized compounds - 2-(p-chlorophenyl)-3-methyl-4- (p-isopropylphenyl)-1,3-thiazolium-5-(N-arylacetamide)thio chloridrates 7a-j Mesoionic 2-(p-chlorophenyl)-3-methyl-4-(pisopropylphenyl)-1,3-thiazolium-5-thiolate 5 (278 mmol) was dissolved in hot ethanol and then 2-chloro-Narylacetamides 6a-j (278 mmol) were added. The system was refluxed for 4 h and then concentrated at reduced pressure, giving a yellow-orange solid.

R1, R2 =H, H

2-(p-Chlorophenyl)-3-methyl-4-(p-isopropylphenyl)-1,3- thiazolium-5-(N-phenylacetamide)thio chloridrate 7a Yield: 92.13%;

m.p.: 130-132 °C; anal. calcd.: C, 60.58; H, 4.69; N, 5.43; S, 12.44; found: C, 60.60; H, 4.70; N, 5.42; S, 12.42;

IR (KBr) νmax / cm-1 3181 (NH), 3003 (CHAr.), 2958 (CHAlif.), 1680 (C=O), 1599, 1551, 1491 (C=C and C=N of aromatic and heterocyclic rings), 1442 (C–N of N–CH3), 1404 (C–N), 1092 (C–Cl), 1001, 922 (CHAr.), 756 (NH), 557, 537 (C–C);

1 H NMR (200 MHz, CDCl3) delta
1.30 (d, 6H, J 6.9 Hz, H-16, H-16’),
2.98 (sept, 1H, H-15), 3.79 (s, 2H, H-17),
3.84 (s, 3H, H-10), 7.09 (t, 2H, J 7.3 Hz, H-23),
7.28-7.34 (m, 4H, H-13, H-13’, H-21, H-25),
7.60 (d, 2H, J 8.1 Hz, H-8, H-8’),
7.73 (d, 2H, J 7.9 Hz, H-12, H-12’),
7.86-7.93 (t, 4H, J 7.3 Hz, H-7, H-7’, H-22, H-24),
11.02 (s, 1H, H-19);

13C NMR (50 MHz, CDCl3)
delta 170.21 (C-2), 166.81 (C-18), 152.68 (C-14),
140.28 (C-4), 138.93 (C-9), 132.04 (C-20), 131.64 (C-7, C-7’), 130.89 (C-12, C-12’),
130.27 (C-8, C-8’), 128.69 (C-22, C-24), 127.54 (C-13, C-13’),
124.09 (C-23), 123.79 (C-11), 123.59 (C-6),
120.28 (C-21, C-25), 42.24 (C-17), 40.92 (C-10), 34.21 (C-15), 23.76 (C-16, 16’).

Peixoto IN, Souza HDS, Lira BF, Silva DF, Lima EO, Barbosa-Filho JM, et al. Synthesis and Antifungal Activity AgainstCandida Strains of Mesoionic System Derived From 1,3-Thyazolium-5-thiolate. J. Braz. Chem. Soc. 2016;27(10):1807-1813

J. Braz. Chem. Soc. 2016, 27(10), 1807-1813

Synthesis and Antifungal Activity Against Candida Strains of Mesoionic System Derived From 1,3-Thyazolium-5-thiolate

Isabelle N. Peixoto; Helivaldo D. S. Souza; Bruno F. Lira; Daniele F. Silva; Edeltrudes O. Lima; José M. Barbosa-Filho; Petrônio F. de Athayde-Filho

Ten new mesoionic derivatives from the 1,3-thiazolium-5-thiolate system with substituted acetamides were synthesized, had their potential as new drug evaluated in an in silico study and in their activity as antifungal against strains of Candida albicans.

Published online: February 26, 2016

Petrônio Filgueiras Athayde-Filho

Petrônio F. de Athayde-Filho
Universidade Federal da Paraíba

Universidade Federal da Paraíba

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Tuesday, 6 September 2016

Imine Reduction Using Iron Catalysts

Imine Reduction Using Iron Catalysts

Abnormal-NHC-Fe(0) complex outperforms noble metal catalysts

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A Highly Efficient Base-Metal Catalyst: Chemoselective Reduction of Imines to Amines Using An Abnormal-NHC–Fe(0) Complex

 Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
 Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
Organometallics, Article ASAP
DOI: 10.1021/acs.organomet.6b00478
*E-mail for S.K.M.:

Abstract Image
A base-metal, Fe(0)-catalyzed hydrosilylation of imines to obtain amines is reported here which outperforms its noble-metal congeners with the highest TON of 17000. The catalyst, (aNHC)Fe(CO)4, works under very mild conditions, with extremely low catalyst loading (down to 0.005 mol %), and exhibits excellent chemoselectivity. The facile nature of the imine reduction under mild conditions has been further demonstrated by reducing imines towards expensive commercial amines and biologically important N-alkylated sugars, which are difficult to achieve otherwise. A mechanistic pathway and the source of chemoselectivity for imine hydrosilylation have been proposed on the basis of the well-defined catalyst and isolable intermediates along the catalytic cycle.

Swadhin K. Mandal

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Swadhin Mandal
Associate Professor
Dept: Chemical Sciences (DCS)
E-mail: swadhin.mandal [at]
Personal homepage: Click Here

Research Interest: 

    Organometallic chemistry and its application in catalysis, new drug development and material chemistry

Academic Background:
  1. BSc (Chemistry), University of Kalyani, 1993, Secured 3rd Rank in University
  2. MSc (Chemistry), University of Kalyani, 1996, Secured first rank in University
  3. PhD (Chemistry), Indian Institute of Science Bangalore, 2002

  1. Postdoctoral Fellow, University of California, Riverside (2002 - 2005)
  2. Alexander von Humboldt Fellow, University of Goettingen (2006 - 2007)
  3. Assistant Professor, IISER Kolkata (2007 - 2013)
  4. Associate Professor, IISER Kolkata (2013 - 2014)
  5. Associate Professor, IISER Kolkata ( - )

Awards and Honors:
  1. Alexander von Humboldt Fellowship from Alexander von Humboldt Foundation (2005)
  2. YIM Boston Young Scientist Award from YIM Boston at MIT, USA (2012)
Selected Publications
  • Bhunia et al. Organometallics, in press2016
  • Paira, Singh et al. J. Org. Chem., 2016, 81 (6), 2432-2441.
  • Pariyar et al.  J. Am. Chem. Soc. 2015, 1375955-5960 (This work was highlighted by Press coverage, see some links  natureINDIABusiness Standard, IBN7The Statesman,ZeeNewsYahooCrazyengineersDelhi Daily NewsIndia SamvadKansas City Post,Indianapolis Post,  Toronto TelegraphSeattle IndiaMaine MirrorHawaii Telegraph,Indusage).
  • Hota et al. Adv. Synth. Cat. 2015, 357, 3162 - 3170.
  • Raha Roy et al.  ACS Catalysis 201444307–4319 (Selected as a significant recent publicationin a cross-journal virtual issue designed to showcase the significant recent publications among ACS CatalysisJournal of the American Chemical SocietyJournal of Organic Chemistry, and Organic Letters.)
  • Raha Roy et al.  J. Org. Chem. 2014, 79, 9150-9160. 
  •  Sau et al.  Chem. Asian J 20149, 2806-2813. 
  • Raman et al. Nature , 2013., 493, 509-513 ( This work was selected for Press Release coverage by Nature, see some links TelegraphDeccan HeraldNature India, please see Press Release for more news coverage on this work for further details)
  • Santra et alACS Catalysis  2013, 3, 2776−2789.
  • Mukherjee et alOrganometallics  2013, 32, 7213-7224
  • Sau et alAdv. Synth. Cat.  2013, 355, 2982-2991
  • Mukherjee et alScientific Reports  2013, 3, 2821.
  • Mukherjee et al. Chem. Eur. J. 2012, 18, 10530-10545 (Highlighted with  Frontispiece Graphics)
  • Sen et al. Chem. Eur. J. 2012, 18, 54-58.
  • Sau et al. Chem. Commun. 2012, 48, 555-557.
  • Santra et al. Green Chem. 2011, 13, 3238 – 3247.
  • Sen et al. Chem. Commun. 2011, 47, 11972–11974
  • Mukherjee et al. Angew. Chem. Int. Ed. 2011, 50, 3968–3972  (Hot Paper)

Professional Recognitions
  • "SKM delivers Physics Colloquium at University of Greifswald, Germany", 2016.
  • Selected  and presented work as one of the six speakers in “Organometallics Fellowship Symposium” organized at San Francisco during 10-14th August, USA by the ACS Journal Organometallics.
  • Joined Editorial Advisory Board of the Journal 'Organometallics' published by American Chemical Society 2013-2015
  • Recipient of YIM-Young Scientist Award -2012 by YIM-Boston held during 6-8th October, 2012 at MIT, Boston, USA for his contribution in the area of Organometallic Chemistry. He is one of the two recipients of this award for the year 2012.
  • Alexander von Humboldt Fellowship during 2006-2007 at University of Goettingen, Germany.
Selected Publications:
  1. Raman, Karthik V; Kamerbeek, Alexander M.; Mukherjee, Arup; Atodiresei, Nicolae; Sen, Tamal K; Lazic, Predrag; Caciuc, Vasile; Michel, Reent; Stalke, Dietmar; Mandal, Swadhin K; Bluegel, Stephan; Muenzenberg, Markus and Moodera, Jagadeesh. 2013. "Interface-engineered templates for molecular spin memory devices." Nature, 493, 509-513
  2. Sen, Tamal K; Mukherjee, Arup; Modak, Arghya; Mandal, Swadhin K and Koley, Debasis. 2013. "Substitution Effect on Phenalenyl Backbone in the Rate of Organozinc Catalyzed ROP of Cyclic Esters." Dalton Trans., 42, 1893-1904
  3. Mukherjee, Arup; Sen, Tamal K.; Ghorai, Pradip Kr.; Samuel, Prinson P.; Schulzke, Carola and Mandal, Swadhin K. 2012. "Phenalenyl-Based Organozinc Catalysts for Intramolecular Hydroamination Reactions: A Combined Catalytic, Kinetic, and Mechanistic Investigation of the Catalytic Cycle." Chemistry -A European Journal, 18, 10530-545


Gonela Vijay Kumar, SRF

Research Interest:
Development of Nucleophilic Boron Compounds and its Reactivity.
Email -


Pradip Kumar Hota, SRF
Research Interest:
Transition Metal Mediated  C-C Coupling Reactions.

Email -


Mrinal Bhunia, SRF

Research Interest:
Development of Abnormal Carbene based Transition Metal Complexes for Synthesis of Pharmaceutically Important Molecules.
Email -

Directed Route to Biaryls

Directed Route to Biaryls

Palladium(II)-catalyzed C–H arylation of aromatic alcohols directed by quinolinyl acetal

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View issue TOC
Volume 22, Issue 37
September 5, 2016
Pages 13054–13058

Palladium(II)-Catalyzed ortho-Arylation of Aromatic Alcohols with a Readily Attachable and Cleavable Molecular Scaffold

    1. Department of Chemistry, University of Georgia, Athens, GA, USA
  • DOI: 10.1002/chem.201602844


hemiacetal 9 (0.811 g, Rf = 0.21 in 1:1 hexanes/EtOAc) as yellow solid. (Total amount: 6.87 g, 92% yield over 3 steps). Hemiacetal 9 (characterized as a 100:3 mixture of hemiacetal/aldehyde): 

1 H NMR (400 MHz, DMSOd6) δ 8.31 (s, 1H), 8.06 (d, J = 8.5 Hz, 1H), 8.01 (d, J = 8.2 Hz, 1H), 7.81-7.72 (m, 1H), 7.66-7.58 (m, 1H), 7.09 (d, J = 7.6 Hz, 1H), 6.27 (d, J = 7.6 Hz, 1H), 5.25 (d, J = 13.6 Hz, 1H), 5.10 (dd, J = 13.6, 1.0 Hz, 1H); 

13C NMR (100 MHz, DMSO-d6) δ 161.5, 147.7, 130.6, 129.3, 128.9, 128.2, 127.4, 126.7, 97.9, 68.3; IR (film) 3194, 1504, 1020, 910, 754 cm-1 ;

 HRMS (ESI+) m/z calc’d for (M + H)+ [C11H9NO2 + H]+ : 188.0706, found 188.0706.

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Contact Information:
Associate Professor of Chemistry
University of Georgia
Chemistry Department
Athens, GA 30602
Tel. (706) 542-4231
As an undergraduate student at Massachusetts Institute of Technology  (1996-2000), Eric worked on copper-catalyzed conjugate reduction chemistry under the direction of Professor Stephen Buchwald.  His Ph.D. research with Professor Brian Stoltz at the California Institute of Technology (2000-2005) focused on the development of synthetically useful novel oxidation systems using palladium catalysis.  Upon completion, he then continued his studies as an American Cancer Society postdoctoral associate at Stanford (2005-2008) with Prof. Barry Trost, where his studies concerned the use of ruthenium and palladium catalyzed cycloisomerizations for the formation of polycyclic compounds.  He then began his independent career as an assistant professor at Colorado State University in 2008. Eric is currently an Associate Professor of Chemistry at the University of Georgia in Athens, GA.

Dr. Qiankun Li
Ph.D., Zhejiang University
Project: Photocatalysis of earth-abundant metals