K. Arun Kumar

Loyola University Chicago

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A. Dayalan

Loyola University Chicago

M. Sreenivasulu

KLE Technological University

M. Amutha Selvi

Avinashilingam University

Sundaram Venkatraman

Dr. Reddy's Laboratories (India)

P. V. Subba Rao

Central Institute of Freshwater Aquaculture

Apurba Bhattacharya

Texas A&M University – Kingsville

C. Periyasamy

Manonmaniam Sundaranar University

K. Sateesh Reddy

Dr. Reddy's Laboratories (India)

Kapil Kumar

University of Petroleum and Energy Studies

Chandrashekar R. Elati

Dr. Reddy's Laboratories (India)

Cooperative Institutions

Dr. Reddy's Laboratories (India)

Dr. Reddy's Laboratories (United States)

Jawaharlal Nehru Technological University, Hyderabad

University of Hyderabad

Anna University, Chennai

Loyola University Chicago

Andhra University

Bharathidasan University

Central University of Kerala

Indian Institute of Science Bangalore

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1,3-Bis(2,4,6-trimethylphenyl)imidazolium chloride in combination with triethylamine: an improved catalytic system for hydroacylation/reduction of activated ketones

Tetrahedron Letters (2010)

M. Sreenivasulu K. Arun Kumar K. Sateesh Reddy Kapil Kumar Pramod Kumar

Hydroacylation

Triethylamine

10.1016/j.tetlet.2010.12.022

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Citations (21)

(Carbonato-κ²O,O′)bis(5,5′-dimethyl-2,2′-bipyridyl-κ²N,N′)cobalt(III) bromide trihydrate

Acta Crystallographica Section E Structure Reports Online (2012)

K. Arun Kumar P. Meera M. Amutha Selvi A. Dayalan

In the title complex, [Co(CO(3))(C(12)H(12)N(2))(2)]Br·3H(2)O, the Co(III) cation has a distorted octa-hedral coordination environment. It is chelated by four N atoms of two different 5,5'-dimethyl-2,2'-bipyridyl (dmbpy) ligands in axial and equatorial positions, and by two O atoms of a carbonate anion completing the equatorial positions. Although the water mol-ecules are disordered and their H atoms were not located, there are typical O⋯O distances between 2.8 and 3.0 Å, indicating O-H⋯O hydrogen bonding. The crystal packing is consolidated by C-H⋯O and C-H⋯Br hydrogen bonds, as well as π-π stacking inter-actions between adjacent pyridine rings of the dmbpy ligands, with centroid-centroid distances of 3.694 (3) and 3.7053 (3) Å.

Crystal (programming language)

10.1107/s160053681200894x

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Microalgae

CRC Press eBooks (2024)

D. Vidya K. Nayana A. Srinivasa Rao C. Periyasamy K. Suresh Kumar

Pharmaceutical compounds derived from microalgae are still in their infancy, but they could eventually lead to the creation of new medications. Manufacturing of these substances The market potential for microalgae is expected to rise in the near future, providing opportunities for new biotechnological endeavors that aim to produce more biomass for human use, provided that the demand for food and medicine does not become a hindrance. For the production of chemicals used in medicines and nutraceuticals such as polyunsaturated fatty acids (PUFA), carotenoids, phycobiliproteins, polysaccharides, and phycotoxins, microalgae may be a sustainable supply.

Phycobiliprotein

Nutraceutical

10.1201/9781003219194-22

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D-Phenylglycinium bromide

Acta Crystallographica Section E Structure Reports Online (2013)

M. Parthasarathy K. Arun Kumar R. Gopalakrishnan

In the crystal of the title salt, C8H10NO2 (+)·Br(-), the bromide anions and the phenylglycinium cations are -linked through N-H⋯Br, O-H⋯Br and C-H⋯O hydrogen bonds, generating sheets lying parallel to (001).

Crystal (programming language)

10.1107/s1600536813004807

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Efficient Synthesis of (1R)‐[3,5‐Bis(trifluoromethyl)phenyl] Ethanol, a Key Intermediate for Aprepitant, an NK‐1 Receptor Antagonist

Synthetic Communications (2007)

Pravinchandra J. Vankawala Naveenkumar Kolla Chandrashekar R. Elati M. Sreenivasulu K. Arun Kumar

Abstract Enzyme‐catalyzed efficient synthesis of (1R)‐[3,5‐bis (trifluoromethyl) phenyl] ethanol (R)‐(3), a key intermediate for aprepitant, via enantioselective transesterification of racemic 1‐[3,5‐bis (trifluoromethyl) phenyl] ethanol (RS)‐3 using vinyl acetate as the acyl donor in the presence of Candida antarctica lipase‐B (CAL‐B) in an overall yield of 84% with >99% ee is described. Keywords: aprepitant Candida antarctica lipase‐B (CAL‐B)economic synthesisenantioselctive transesterification Acknowledgments The authors thank the management of Dr. Reddy's Laboratories Ltd. for supporting this work. Cooperation from the project collegues is highly appreciated. Notes DRL‐IPD Communication Number: IPM 00029.

Candida antarctica

Aprepitant

NK1 receptor antagonist

10.1080/00397910701487473

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Citations (14)

Chloridobis(dimethylglyoximato-κ²N,N′)(4-methylpyridine-κN)cobalt(III) hemihydrate

Acta Crystallographica Section E Structure Reports Online (2011)

M. Amutha Selvi K. Arun Kumar A. Dayalan

In the title complex, [Co(C4H7N2O2)2Cl(C6H7N)]·0.5H2O, the central CoIII ion, chelated by four N atoms of the two bidenate glyoximate ligands, exhibits a slightly distorted octahedral geometry. The axial positions are occupied by a chloride ion and the 4-methylpyridine N atom. Intermolecular O—H⋯O hydrogen bonds link the molecules in the crystal via the water molecules, while the glyoximate ligands exhibit intramolecular O—H⋯O hydrogen bonds.

Crystal (programming language)

Hemihydrate

10.1107/s1600536811020162

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cis-Bis(2,2′-bipyridine-κ²N,N′)dichloridocobalt(II) trihydrate

Acta Crystallographica Section E Structure Reports Online (2011)

K. Arun Kumar M. Amuthaselvi A. Dayalan

In the title complex, [CoCl2(C10H8N2)2]·3H2O, the Co(II) ion is situated on a twofold rotation axis and exhibits a slightly distorted octahedral geometry and is chelated by four N atoms of the two bidentate 2,2′-bipyridine ligands and two Cl− ions. The crystal packing is stabilized by hydrogen bonding formed between chloride ions and adjacent water molecules. One of the two independent water molecules in the asymmetric unit is disordered over two sets of sites, each on a twofold rotation axis, in a 0.734 (17):0.269 (17) ratio.

Crystal (programming language)

2,2'-Bipyridine

Bipyridine

10.1107/s1600536811009251

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Citations (9)

ChemInform Abstract: Efficient Synthesis of (1R)‐[3,5‐Bis(trifluoromethyl)phenyl] Ethanol, a Key Intermediate for Aprepitant, an NK‐1 Receptor Antagonist.

ChemInform (2008)

Pravinchandra J. Vankawala Naveenkumar Kolla Chandrashekar R. Elati M. Sreenivasulu K. Arun Kumar

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Aprepitant

10.1002/chin.200810073

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Citations (0)

ChemInform Abstract: 1,3‐Bis(2,4,6‐trimethylphenyl)imidazolium Chloride in Combination with Triethylamine: An Improved Catalytic System for Hydroacylation/Reduction of Activated Ketones.

ChemInform (2011)

M. Sreenivasulu K. Arun Kumar K. Sateesh Reddy Kapil Kumar Pramod Kumar

Abstract A combination of triethylamine and an NHC‐catalyst, generated in situ, efficiently promotes the reduction of α‐keto esters with benzaldehyde as hydrogen acceptor.

Triethylamine

Hydroacylation

Benzaldehyde

10.1002/chin.201117082

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cis-Aquachloridobis(1,10-phenanthroline-κ²N,N′)cobalt(II) chloride 2.5-hydrate

Acta Crystallographica Section E Structure Reports Online (2009)

K. Arun Kumar A. Dayalan K. Sethusankar

In the title complex, [CoCl(C(12)H(8)N(2))(2)(H(2)O)]Cl·2.5H(2)O, the Co(II) ion is coordinated by four N atoms of two bis-chelating 1,10-phenanthroline (phen) ligands, one water mol-ecule and a chloride ligand in a distorted octa-hedral environment. The dihedral angle between the two phen ligands is 84.21 (3)°. In the crystal structure, complex mol-ecules and chloride ions are linked into centrosymmetric four-component clusters by inter-molecular O-H⋯Cl hydrogen bonds. Of the 2.5 solvent water mol-ecules in the asymmetric unit, two were refined as disordered over two sites with fixed occupancies of ratios 0.50:0.50 and 0.60:0.40, while another was refined with half occupancy.

Phenanthroline

10.1107/s1600536809038422

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Citations (8)