Results 91 to 100 of about 48,499 (273)

Regioselectivity of H Cluster Oxidation

Journal of the American Chemical Society, 2011
The H(2)-evolving potential of [FeFe] hydrogenases is severely limited by the oxygen sensitivity of this class of enzymes. Recent experimental studies on hydrogenase from C. reinhardtii point to O(2)-induced structural changes in the [Fe(4)S(4)] subsite of the H cluster. Here, we investigate the mechanistic basis of this observation by means of density
Bruska, Marta K., Stiebritz, Martin T., Reiher, Markus   +2 more
openaire   +2 more sources

Reactivity of (1-methoxycarbonylpentadienyl)iron(1+) cations with hydride, methyl, and nitrogen nucleophiles [PDF]

, 2017
The reaction of tricarbonyl and (dicarbonyl)triphenylphosphine (1-methoxycarbonyl-pentadientyl)iron(1+) cations 7 and 8 with methyl lithium, NaBH3CN, or potassium phthalimide affords (pentenediyl)iron complexes 9a-c and 11a-b, while reaction with ...
Anobick Sar, Brown, Casas-Solvas, Cox, Creary, Donaldson, Donaldson, Donaldson, Donaldson, Donaldson, Donaldson, El Amouri, Ferber, Gree, Gree, Hanessian, Hossain, Iwata, Jaouen, Jayapal Reddy Gone, Julie Wondergem (nee Lukesh), Kausch-Busies, Knoelker, Kocsis, Konno, Laabassi, Lee, Lehmann, Lehmann, Li, Lukesh, Luyt, Morey, Motiei, Osella, Pandey, Pearson, Pinsard, Rostovtsev, Sergey Lindeman, Siddiquee, Sorenson, Sudhir, Sudhir, Szanti-Pinter, Szanti-Pinter, Szanti-Pinter, Tao, Top, Top, Trakossas, Wallock, Wasicak, William A. Donaldson, Ye, Young K. Yun, Yun, Yun, Yuzhi Ma   +58 more
core   +2 more sources

Stereoselective epoxidation of the last double bond of polyunsaturated fatty acids by human cytochromes P450

Journal of Lipid Research, 2010
Cytochromes P450 (CYPs) metabolize polyunsaturated long-chain fatty acids (PUFA-LC) to several classes of oxygenated metabolites. Through use of human recombinant CYPs, we recently showed that CYP1A1, -2C19, -2D6, -2E1, and -3A4 are mainly hydroxylases ...
Danièle Lucas, Sophie Goulitquer, Jan Marienhagen, Maude Fer, Yvonne Dreano, Ulrich Schwaneberg, Yolande Amet, Laurent Corcos   +7 more
doaj   +1 more source

Synthesis and Reactivity of Tricarbonyl(1-ethoxy-carbonyl-2-methylpentadienyl)iron(1+) Cation [PDF]

, 2001
The title cation was prepared in two steps from the known (ethyl 3-methyl-6-oxo-2,4-hexadienoate)Fe(CO)3. Reation of the cation with NaBH3CN, methyl cuprate, phthalimide, water, PPh3, or malonate anions gave predominantly the products from nucleophilic ...
Bärmann, Heiko, Donaldson, William, Yun, Young K.   +2 more
core   +1 more source

In Vivo Evolution of Butane Oxidation by Terminal Alkane Hydroxylases AlkB and CYP153A6 [PDF]

, 2009
Enzymes of the AlkB and CYP153 families catalyze the first step in the catabolism of medium-chain-length alkanes, selective oxidation of the alkane to the 1-alkanol, and enable their host organisms to utilize alkanes as carbon sources.
Arnold, Frances H., Chen, Mike M., Koch, Daniel J., van Beilen, Jan B.   +3 more
core   +3 more sources

Ligand control of regioselectivity in palladium-catalyzed heteroannulation reactions of 1,3-Dienes

Nature Communications
Olefin carbofunctionalization reactions are indispensable tools for constructing diverse, functionalized scaffolds from simple starting materials. However, achieving precise control over regioselectivity in intermolecular reactions remains a formidable ...
Dasha Rodina, Jakub Vaith, Shauna M. Paradine   +2 more
doaj   +1 more source

Selective and reversible 1,3-dipolar cycloaddition of 6-aryl-1,5-diazabicyclo[3.1.0]hexanes with 1,3-diphenylprop-2-en-1-ones under microwave irradiation

Beilstein Journal of Organic Chemistry, 2020
The first example of the cycloaddition of in situ-generated azomethine imine under microwave conditions is described. The reaction of 6-aryl-1,5-diazabicyclo[3.1.0]hexanes with 1,3-diphenylprop-2-en-1-ones proceeds regio- and stereoselectively giving ...
Alexander P. Molchanov, Mariia M. Efremova, Mariya A. Kryukova, Mikhail A. Kuznetsov   +3 more
doaj   +1 more source

A regioselectivity switch in Pd-catalyzed hydroallylation of alkynes. [PDF]

, 2019
By exploiting the reactivity of a vinyl-Pd species, we control the regioselectivity in hydroallylation of alkynes under Pd-hydride catalysis. A monophosphine ligand and carboxylic acid combination promotes 1,5-dienes through a pathway involving ...
Chen, Qing-An, Dong, Vy M, Hu, Yan-Cheng, Ji, Ding-Wei, Zhao, Chao-Yang, Zheng, Hao   +5 more
core  

Research on synthesis of microwave‐assisted heterocyclic compounds with eco‐friendly solvents and transition metals via C–H activation

Bulletin of the Korean Chemical Society, EarlyView.
This review summarizes microwave‐assisted transition‐metal catalysis for constructing N‐ and O‐heterocycles, highlighting rapid C–H and pre‐activated C–X activation, improved selectivity, and green synthetic efficiency. Abstract Microwave‐assisted organic synthesis provides a rapid and sustainable platform for synthesizing various heterocycles ...
Woo‐Jin Park, Ye Ri Han, Hyejeong Lee
wiley   +1 more source

Elucidating the Interplay Between Structure and Electrochemical Behavior in Lignin‐Based Polymer Electrolytes for Potassium Batteries

Battery Energy, Volume 4, Issue 2, March 2025.
Three biobased membranes are synthesized by crosslinking oxidized Kraft lignin with poly(ethylene glycol) diglycidyl ether of increasing molecular weights. After incorporation of solvated potassium salts, potassium batteries including these biobased gel polymer electrolytes are able to deliver a maximum specific capacity at 0.05 A g−1 as high as 130 ...
Giuseppe Pascuzzi, Sabrina Trano, Carlotta Francia, Stefano Turri, Federico Bella, Gianmarco Griffini   +5 more
wiley   +1 more source