Results 11 to 20 of about 123,983 (385)

Synthesis of Dibenzylbutane and 9,8′-Neo-Lignans via Cyclometalation of Allylbenzene by EtAlCl2 and Mg in the Presence of Zr ansa-Complexes

open access: yesChemistry Proceedings, 2021
The aim of the research is the development of a one-pot method for the synthesis of lignans, natural compounds that show a wide spectrum of biological activities.
Pavel V. Kovyazin   +3 more
doaj   +1 more source

Metal-free visible-light-enabled vicinal trifluoromethyl dithiolation of unactivated alkenes

open access: yesBeilstein Journal of Organic Chemistry, 2021
The difunctionalization of alkenes involving a trifluoromethylthio group (SCF3) for the conversion of versatile and readily available olefins into structurally more complex molecules has been successfully studied.
Xiaojuan Li   +5 more
doaj   +1 more source

From‐Neutral‐to‐Neutral Reductive Radical Coupling of Non‐Activated Alcohols and Styrenes

open access: yesChemistryEurope, 2023
A reductive radical coupling reaction between non‐activated aliphatic alcohols and styrenes has been discovered through the use of low‐valent Ti‐mediated C−O bond homolysis.
Dr. Takuya Suga   +2 more
doaj   +1 more source

Iron(III)-Mediated Rapid Radical-Type Three-Component Deuteration of Quinoxalinones With Olefins and NaBD4

open access: yesFrontiers in Chemistry, 2020
Iron(III)-promoted rapid three-component deuteration of quinoxalinones with olefins and NaBD4 is reported for the first time, which provides a novel, economic, and efficient method for the rapid synthesis of deuterated quinoxalinones.
Wanmei Li   +6 more
doaj   +1 more source

Stereo-Electronic Factors Influencing the Stability of Hydroperoxyalkyl Radicals: Transferability of Chemical Trends across Hydrocarbons and ab initio Methods [PDF]

open access: yesPhys. Chem. Chem. Phys., 2023, 2023
The hydroperoxyalkyl radicals (.QOOH) are known to play a significant role in combustion and tropospheric processes, yet their direct spectroscopic detection remains challenging. In this study, we investigate molecular stereo-electronic effects influencing the kinetic and thermodynamic stability of a .QOOH along its formation path from the precursor ...
arxiv   +1 more source

Millimetre and submillimetre spectroscopy of isobutene and its detection in the molecular cloud G+0.693 [PDF]

open access: yesA&A 680, A25 (2023), 2023
Isobutene ((CH$_3$)$_2$C=CH$_2$) is one of the four isomers of butene (C$_4$H$_8$). Given the detection of propene (CH$_3$CH=CH$_2$) toward TMC-1, and also in the warmer environment of the solar-type protostellar system IRAS 16293$-$2422, one of the next alkenes, isobutene, is a promising candidate to be searched for in space.
arxiv   +1 more source

Trifluoromethanesulfonamide vs. Non-Fluorinated Sulfonamides in Oxidative Sulfamidation of the C=C Bond: An In Silico Study

open access: yesMolecules, 2020
A theoretical analysis of the reaction of oxidative sulfamidation of several alkenes was performed in order to explain the various experimental observations and different reactivity of triflamide and non-fluorinated sulfonamides.
Anton V. Kuzmin   +2 more
doaj   +1 more source

Microbial synthesis of long-chain α-alkenes from methanol by engineering Pichia pastoris

open access: yesBioresources and Bioprocessing, 2022
α-Alkenes (terminal alkenes) are important fuel and platform chemicals that are mainly produced from petroleum. Microbial synthesis might provide a sustainable approach for α-alkenes.
Peng Cai   +6 more
doaj   +1 more source

A Data-Driven Machine Learning Approach for Electron-Molecule Ionization Cross Sections [PDF]

open access: yesJ. Phys. B 57, 025201 (2024), 2023
Despite their importance in a wide variety of applications, the estimation of ionization cross sections for large molecules continues to present challenges for both experiment and theory. Machine learning algorithms have been shown to be an effective mechanism for estimating cross section data for atomic targets and a select number of molecular targets.
arxiv   +1 more source

Enantioselective Hydrogenations with Chiral Titanocenes

open access: yesMolecules, 2005
In this review article chiral titanocenes and their application for the enantioselective hydrogenations of different unsaturated compounds are discussed, with a special emphasis on the kinetics and the practicality of the developed systems. The nature of
J. Khinast, A. Panarello, O. Vassylyev
doaj   +1 more source

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