Results 11 to 20 of about 64,971 (268)

Hypervalent Iodine-Mediated Diastereoselective α-Acetoxylation of Cyclic Ketones

Frontiers in Chemistry, 2020
A binary hybrid system comprising a hypervalent iodine(III) reagent and BF3•OEt2 Lewis acid was found to be effective for the diastereoselective α-acetoxylation of cyclic ketones.
Jiashen Tan, Weiqin Zhu, Weiping Xu, Yaru Jing, Yaru Jing, Zhuofeng Ke, Yan Liu, Keiji Maruoka, Keiji Maruoka   +8 more
doaj   +1 more source

The effect of Tb substitution for Ni on microstructure, martensitic transformation and cyclic stability of elastocaloric effect in Ni–Mn–Sn magnetic shape memory alloys

Journal of Materials Research and Technology, 2022
Cyclic stability of elastocaloric effect is the key factor that restricts the elastocaloric cooling application of Ni–Mn–Sn alloys fabricated by the conventional melting technique.
Wanyuan Gui, Yuhai Qu, Yuxian Cao, Yunzhi Zhao, Chenxu Liu, Qing Zhou, Jie Chen, Yahui Liu   +7 more
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Direct Regioselective Dehydrogenation of α‐Substituted Cyclic Ketones

Angewandte Chemie International Edition, 2023
AbstractWe disclose a highly regioselective, catalytic one‐step dehydrogenation of α‐substituted cyclic ketones in the presence of 2,3‐dichlorobenzo‐5,6‐dicyano‐1,4‐benzoquinone (DDQ). The high regioselectivity originates from a phosphoric acid‐catalyzed enolization, selectively affording the thermodynamically preferred enol, followed by the subsequent
Sebastian Armin Schwengers, Gabriela Guillermina Gerosa, Tynchtyk Amatov, Naoki Yasukawa, Sebastian Brunen, Markus Leutzsch, Benjamin Mitschke, Grigory André Shevchenko, Benjamin List   +8 more
openaire   +3 more sources

A Power Associative Loop Structure for the Construction of Non-Linear Components of Block Cipher

IEEE Access, 2020
In the symmetric key cryptography, the purpose of the substitution box is to generate confusion and hence improve the security of the whole cryptosystem.
Sadam Hussain, Sajjad Shaukat Jamal, Tariq Shah, Iqtadar Hussain   +3 more
doaj   +1 more source

DFT Studies of New Class of Single-Headed Nucleosides Derived from the D-glucaric Acid

Scientific Journal of King Faisal University: Basic and Applied Sciences, 2020
The nucleoside analogues can be conveniently classified into cyclic or acyclic analogues. The goal of this study is to anticipate the structural and electronic properties of new single-headed acyclo-C-nucleosides derived from the D-glucaric acid which ...
Sarah Amara, Noureddine Tchouar, Adil A. Othman   +2 more
doaj   +1 more source

Synthesis, self-assembly and lipoplex formulation of two novel cyclic phosphonate lipids [PDF]

QScience Connect, 2013
Background: Synthetic cationic lipids hold much potential as gene packaging and delivery agents for the treatment of inherited and acquired life threatening diseases, such as cancer, AIDS, cardiovascular diseases, and certain autoimmune disorders ...
JenniferYeh, ElenaTamarkina, NadaAbdul Khalique, LijiRaju, Michael D.Pungente   +4 more
doaj   +1 more source

Impact of Peptide Structure on Colonic Stability and Tissue Permeability

Pharmaceutics, 2023
Most marketed peptide drugs are administered parenterally due to their inherent gastrointestinal (GI) instability and poor permeability across the GI epithelium.
Farhan Taherali, Nerisha Chouhan, Fanjin Wang, Sebastien Lavielle, Maryana Baran, Laura E. McCoubrey, Abdul W. Basit, Vipul Yadav   +7 more
doaj   +1 more source

Understanding the mechanism of Pd-catalyzed allylic substitution of the cyclic difluorinated carbonates

Beilstein Journal of Organic Chemistry, 2008
We present a mechanistic investigation of Pd-catalyzed allylic substitution of cyclic gem-difluorinated carbonates 1 and 4, previously employed in the synthesis of 3',3'-difluoro-2'-hydroxymethyl-4',5'-unsaturated carbocyclic nucleosides in 17 steps. The
Jun Xu, Xiao-Long Qiu, Feng-Ling Qing
doaj   +1 more source

Single nucleotide polymorphisms of human STING can affect innate immune response to cyclic dinucleotides.

PLoS ONE, 2013
The STING (stimulator of interferon genes) protein can bind cyclic dinucleotides to activate the production of type I interferons and inflammatory cytokines.
Guanghui Yi, Volker P Brendel, Chang Shu, Pingwei Li, Satheesh Palanathan, C Cheng Kao   +5 more
doaj   +1 more source

N-Borane-Substituted Cyclic Phosphine Imides (BCPIs)

Bulletin of the Chemical Society of Japan, 2023
Phosphine imides are ubiquitous nucleophiles/Lewis bases in modern organic chemistry. The introduction of unexplored substituents on the phosphine imidoyl nitrogen and/or phosphorus atoms should facilitate the discovery of unprecedented utility for phosphine imides.
Shun Nagai, Takaya Hinogami, Sensuke Ogoshi, Yoichi Hoshimoto   +3 more
openaire   +1 more source