Results 31 to 40 of about 11,578 (241)
Synthesis and spectrometric study of some nucleophilic reactions of the antiepileptic molecule; 5,5-diphenyl imidazolidine-2,4-dione. [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2018 New reaction routs were performed for the compound 5,5-diphenyl 2,4-imidazolidinedione (I) to give derivatives (II – VII). These reactions include acylation, halogenation, reduction, and nucleophilic substitutions. Most of the derivatives showed variable
Saadi M. D. Al-Nuzal +2 more
doaj +1 more source
Metals, 2018 The present study focuses on the pyrolysis of discarded smartphone displays in order to investigate if a halogenation and volatilization of indium is possible without a supplementary halogenation agent.
Benedikt Flerus +4 more
doaj +1 more source
Frontiers in Chemistry, 2018 In this work we present the first computational study on the hectochlorin biosynthesis enzyme HctB, which is a unique three-domain halogenase that activates non-amino acid moieties tethered to an acyl-carrier, and as such may have biotechnological ...
Amy Timmins +5 more
doaj +1 more source
Chemical Reviews, 2016 The halogen bond occurs when there is evidence of a net attractive interaction between an electrophilic region associated with a halogen atom in a molecular entity and a nucleophilic region in another, or the same, molecular entity. In this fairly extensive review, after a brief history of the interaction, we will provide the reader with a snapshot of ...
Cavallo, Gabriella +7 more
openaire +2 more sources
Halogen⋯halogen contra C–H⋯halogen interactions
CrystEngComm, 2014 Pressure affects the competition between C–H⋯X hydrogen bonds and X⋯X halogen⋯halogen interactions. In bromomethane, CH3Br, pressure changes the molecular arrangement of the two solid-state phases of this compound: low-pressure phase α is dominated by halogen⋯halogen interactions, whereas above 1.5 GPa the β phase is governed by C–H⋯halogen bonds.
Marcin Podsiadło +2 more
openaire +2 more sources
‐3‐Halogenation of its Native Substrate [PDF]
, 2021 Non-heme iron/ α -ketoglutarate dependent halogenases acting on freestanding substrates catalyze the regio- and stereoselective halogenation of inactivated C(sp 3 )-H bonds.
Takahiro Hayashi +14 more
core +1 more source
Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries
Angewandte Chemie, EarlyView.This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho +4 more
wiley +2 more sources
Pyridine C─N Transposition via Cycloaddition–Cycloreversion
Angewandte Chemie, EarlyView.Transposition of pyridine nitrogen from the 4‐ to the 3‐position is described using two open and shut sequences: a nucleophile addition ring‐open ring‐closure, followed by a nitrile Diels–Alder cycloaddition cycloreversion. The nitrogen swap is particularly effective for tertiary alkyl substituents, transforming easily accessible para‐alkylated ...
Aífe Conboy, Michael F. Greaney
wiley +2 more sources
Halogenation effect on physicochemical properties of Ti3C2 MXenes
JPhys Materials, 2023 Halogenated MXenes have been experimentally demonstrated to be promising two-dimensional materials for a wide range of applicability. However, their physicochemical properties are largely unknown at the atomic level.
Seyedeh Alieh Kazemi +6 more
doaj +1 more source
Halogenation of Pharmaceuticals Is an Impediment to Ready Biodegradability
, 2023 International audienceFor pharmacological reasons many active organic pharmaceutical substances (AOPSs) are singly or multiply halogenated. Halogenation can confer optimised steric fitting of an AOPS to its molecular receptor; moreover, by increasing the
Le Roux, Julien +5 more
core +1 more source