Results 51 to 60 of about 18,651 (251)

Macrocyclic colibactin induces DNA double-strand breaks via copper-mediated oxidative cleavage. [PDF]

, 2019
Colibactin is an assumed human gut bacterial genotoxin, whose biosynthesis is linked to the clb genomic island that has a widespread distribution in pathogenic and commensal human enterobacteria.
A Collins, A Cougnoux, AO Brachmann, BR Stern, Bradley S. Moore, CA Brotherton, CA Brotherton, CM Woo, D Payros, E Buc, EP Balskus, EP Rogakou, G Cuevas-Ramos, G Sharon, HB Bode, I Cho, J Chen, JA Stubbe, JC Arthur, Jennifer Y. H. Lai, Jie Li, JK Nicholson, JP Nougayrède, KJ Humphreys, KK Khanna, KS Chaturvedi, L Zha, L Zha, LB Schultz, LC Colis, LF Povirk, M Olier, M Pitie, MI Vizcaino, MI Vizcaino, MR Wilson, MS Donia, MS Donia, MS Melvin, N Bossuet-Greif, N Bossuet-Greif, NS Guntaka, P Engel, P Tripathi, Pei-Yuan Qian, RM Bleich, RM Burger, S Borah, S Tomkovich, Shaun M. K. McKinnie, T Faïs, T Pérez-Berezo, T Secher, TC Holmes, V Bondarev, Wei-Peng Zhang, Wenjun Zhang, Wenlong Cai, X Bian, X Bian, Y Pommier, YA Chan, Z-R Li, Z-R Li, Zhong-Rui Li   +64 more
core   +1 more source

The One‐Step Synthesis of Biologically Active Isochromans from Lignin‐Derived Aromatic Monomers in Tunable Deep Eutectic Solvents

Chemistry – A European Journal, EarlyView.
A straightforward one‐step protocol enables the synthesis of bio‐based and biologically active isochromans through the Oxa‐Pictet cyclization involving diverse aldehydes, including vanillin in combination with lignin‐derivable homovanillyl alcohol, a prominent aromatic platform chemical obtainable via diol‐assisted fractionation of lignocellulose ...
Anjali Kottayi, Anastasiia M. Afanasenko, Antonio A. Castillo‐Garcia, Walid A. M. Elgaher, Jörg Haupenthal, Anna K. H. Hirsch, Katalin Barta   +6 more
wiley   +1 more source

Density Functional Theory Applied to Excited State Intramolecular Proton Transfer in Imidazole-, Oxazole-, and Thiazole-Based Systems

Molecules, 2018
Excited state intramolecular proton transfer (ESIPT) is a photoinduced process strongly associated to hydrogen bonding within a molecular framework. In this manuscript, we computed potential energy data using Time Dependent Density Functional Theory ...
Fabricio de Carvalho, Maurício D. Coutinho Neto, Fernando H. Bartoloni, Paula Homem-de-Mello   +3 more
doaj   +1 more source

Chemistry and Biology of Streptogramin A Antibiotics [PDF]

, 2007
The streptogramin A antibiotics have proven to be highly active against Gram positive bacteria, particularly methicillin-resistant Staphylococcus aureus. Members of this group of compounds are characterized by a 23-membered macrocycles containing polyene,
Ahmed, Fahim, Donaldson, William
core   +1 more source

Bistratamides M and N, Oxazole-Thiazole Containing Cyclic Hexapeptides Isolated from Lissoclinum bistratum Interaction of Zinc (II) with Bistratamide K [PDF]

, 2017
[Abstract] Two novel oxazole-thiazole containing cyclic hexapeptides, bistratamides M (1) and N (2) have been isolated from the marine ascidian Lissoclinum bistratum (L. bistratum) collected in Raja Ampat (Papua Bar, Indonesia). The planar structure of 1
Cuevas, Carmen, Fernández, Rogelio, Jiménez, Carlos, Pérez, Marta, Rodríguez, Jaime, Urda, Carlos   +5 more
core   +3 more sources

Synthesis of Unsymmetric Bis(heteroaryl) Selenides by Rhodium‐Catalyzed Exchange Reaction of Heteroaryl Fluorides and Ethers Using Se‐Heteroaryl Carboselenoates

European Journal of Organic Chemistry, EarlyView.
Various unsymmetric bis(heteroaryl) selenides are synthesized by the rhodium‐catalyzed exchange reaction of heteroaryl fluorides and ethers with Se‐heteroaryl 1‐adamatanecarboselenoates. The synthetic method is applicable to a broad range of five‐ and six‐membered heteroaryl derivatives and provides compounds containing multiple heteroatoms.
Masana Yazaki, Wei Han, Ren Suzuki, Mieko Arisawa   +3 more
wiley   +1 more source

Cyclization of Activated Methylene Isocyanides with Methyl N(N),N′-Di(tri)substituted Carbamimidothioate: A Novel Entry for the Synthesis of N,1-Aryl-4-tosyl/ethoxycarbonyl-1H-imidazol-5-amines

SynOpen, 2019
Base-induced cyclization of active methylene isocyanides with carbamimidothioates for the synthesis of N,1-aryl-4-tosyl/ethylcarboxy-1H-imidazol-5-amines is reported.
Dukanya Dukanya, Toreshettahally R. Swaroop, Shobith Rangappa, Kanchugarakoppal S. Rangappa, Basappa Basappa   +4 more
doaj   +1 more source

Poly[3-methyl-1,3-oxazolidin-2-iminium[µ₃-cyanido-tri-µ₂-cyanido-κ⁹C:N-tricuprate(I)]]

Molbank, 2021
The unexpected formation of an oxazole ring has occurred during synthesis of a copper(I) cyanide network polymer as part of our ongoing studies of the structural chemistry of these networks. Crystals of the title compound were formed during the synthesis
Leena N. Rachid, Peter W. R. Corfield
doaj   +1 more source

Evolutionary and molecular foundations of multiple contemporary functions of the nitroreductase superfamily. [PDF]

, 2017
Insight regarding how diverse enzymatic functions and reactions have evolved from ancestral scaffolds is fundamental to understanding chemical and evolutionary biology, and for the exploitation of enzymes for biotechnology.
Akiva, Eyal, Babbitt, Patricia C, Copp, Janine N, Tokuriki, Nobuhiko   +3 more
core   +1 more source

NMR‐Based Structural Analysis of Highly Substituted Pyridines From Kondrat'eva Aza‐Diels–Alder Cycloadditions

Magnetic Resonance in Chemistry, EarlyView.
We report the results from a kinetic and mechanistic investigation of an inverse‐electron‐demand Diels–Alder (IEDDA) cycloaddition involving an oxazole‐type diene synthesized via an Ugi–Zhu multicomponent reaction (UZ‐3CR). ABSTRACT Pyridines are a crucial class of heterocycles with widespread applications in natural products, pharmaceuticals, and ...
Galdina V. Suárez‐Moreno, Francisco Méndez, Atilano Gutierrez‐Carrillo, Mónica A. Rincón‐Guevara, Yoarhy A. Amador‐Sánchez, Alejandro Islas‐Jácome, Eduardo González‐Zamora   +6 more
wiley   +1 more source