Articles with "free approach" as a keyword



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An NHC‐Mediated Metal‐Free Approach towards an NHC‐Coordinated Endocyclic Disilene

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Published in 2022 at "ChemistryOpen"

DOI: 10.1002/open.202100240

Abstract: Abstract A convenient metal‐free approach towards an N‐heterocyclic carbene (NHC)‐coordinated disilene 2 is described. Compound 2, featuring the disilene incorporated in cyclopolysilane framework, was obtained in good yield and characterized using NMR spectroscopy and X‐ray… read more here.

Keywords: approach towards; metal free; free approach; disilene ... See more keywords
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Graphene-based modulation on the hierarchical growth of Al2O3 heterojunctions outside TiO2 nanofibers via a surfactant-free approach

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Published in 2020 at "Composites Communications"

DOI: 10.1016/j.coco.2020.100394

Abstract: Abstract Surface engineering of one-dimensional (1D) TiO2-based heterostructures is extremely vital to the development of new photocatalysts with superior performances. Herein, the Al2O3 heterojunctions onto TiO2 nanofibers were facilely fabricated by a surfactant-free approach, via… read more here.

Keywords: surfactant free; al2o3 heterojunctions; outside tio2; tio2 nanofibers ... See more keywords
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An efficient mesh-free approach for the determination of stresses intensity factors

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Published in 2021 at "Engineering Analysis With Boundary Elements"

DOI: 10.1016/j.enganabound.2021.08.001

Abstract: Abstract In the present paper, an efficient mesh-free approach is established to determine the stress intensity factors in the vicinity of the crack tip. This efficient mesh-free approach is based on the Weighted Least Squares… read more here.

Keywords: approach; intensity factors; mesh free; free approach ... See more keywords
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Approaching Bulk Chemical Nitriles from Alkenes: A Hydrogen Cyanide-Free Approach through a Combination of Hydroformylation and Biocatalysis

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Published in 2019 at "ACS Catalysis"

DOI: 10.1021/acscatal.8b05062

Abstract: A current challenge in catalysis is the development of methodologies for the production of bulk chemicals needed at levels of tens and hundreds of thousands of tons per year with the requirement to be produced… read more here.

Keywords: hydroformylation; combination; cyanide free; free approach ... See more keywords
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Advanced palladium free approach to the synthesis of substituted alkene oxindoles via aluminum-promoted Knoevenagel reaction

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Published in 2018 at "RSC Advances"

DOI: 10.1039/c8ra07576j

Abstract: A synthetic route for the synthesis of C24, as well as for the design of focused libraries of direct AMPK activators was developed based on a convergent strategy. The proposed scheme corresponds to the current… read more here.

Keywords: advanced palladium; aluminum; approach synthesis; synthesis ... See more keywords
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Transition metal-free approach for late-stage benzylic C(sp3)-H etherifications and esterifications.

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Published in 2022 at "Chemical communications"

DOI: 10.1039/d2cc02661a

Abstract: We report a transition metal-free approach for the regioselective functionalization of benzylic C(sp3)-H bonds using alcohols and carboxylic acids as the nucleophiles. This straightforward and general route has provided various benzylic ethers and esters, including… read more here.

Keywords: benzylic sp3; metal free; transition metal; free approach ... See more keywords

A Metal-Free Approach for Brønsted Acid Promoted C–H Alkyl­ation of Heteroarenes with Alkyl Peroxides

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Published in 2018 at "Synthesis"

DOI: 10.1055/s-0037-1609965

Abstract: A metal-free protocol for Minisci C–H alkylation of hetero­arenes using alkyl peroxides as the alkylating reagents and internal oxidants simultaneously under promotion of Bronsted acid has been demonstrated. A series of alkyl substituted heteroarenes were… read more here.

Keywords: nsted acid; alkyl peroxides; acid promoted; approach nsted ... See more keywords
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Hamiltonian based resonance-free approach for enabling very large time steps in multiple time-scale molecular dynamics

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Published in 2021 at "Molecular Physics"

DOI: 10.1080/00268976.2021.1923848

Abstract: Extended phase-space isokinetic methods in their deterministic [Minary et al., Phys. Rev. Lett. 93, 150201 (2004)] and stochastic forms [Leimkuhler et al., Mol. Phys. 111, 3579 (2013)] have proved ... read more here.

Keywords: based resonance; time; approach enabling; resonance free ... See more keywords
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Partition-free approach to open quantum systems in harmonic environments: An exact stochastic Liouville equation

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Published in 2017 at "Physical Review B"

DOI: 10.1103/physrevb.95.125124

Abstract: We present a partition-free approach to the evolution of density matrices for open quantum systems coupled to a harmonic environment. The influence functional formalism combined with a two-time Hubbard-Stratonovich transformation allows us to derive a… read more here.

Keywords: quantum systems; stochastic liouville; approach; open quantum ... See more keywords
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A metal-free approach for the synthesis of thiosulfonates from sulfonyl hydrazides

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Published in 2021 at "Journal of Chemical Research"

DOI: 10.1177/17475198211014444

Abstract: Without any metal catalyst, an efficient transformation of a variety of sulfonyl hydrazides into the corresponding thiosulfonates mediated by NBS/DABCO under air is developed. The method utilizes mild reaction conditions, affords moderate to good yields… read more here.

Keywords: thiosulfonates sulfonyl; synthesis thiosulfonates; sulfonyl hydrazides; metal free ... See more keywords
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A Solvent-Free Approach to Crosslinked Hydrophobic Polymeric Coatings on Paper Using Vegetable Oil

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Published in 2022 at "Polymers"

DOI: 10.3390/polym14091773

Abstract: Hydrophobic coatings are of utmost importance for many applications of paper-based materials. However, to date, most coating methods demand vast amounts of chemicals and solvents. Frequently, fossil-based coating materials are being used and multiple derivatization… read more here.

Keywords: hydrophobic polymeric; oil; solvent free; free approach ... See more keywords