Articles with "selective ring" as a keyword



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Influence of the metallic content on Pt-Ir/Nb2O5 catalysts for decalin selective ring opening

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Published in 2017 at "Catalysis Today"

DOI: 10.1016/j.cattod.2016.10.004

Abstract: Abstract Ring opening of naphthenic rings on Pt-Ir catalysts supported on Nb2O5 was studied in this work. The catalysts were prepared by impregnation. In the case of the bimetallic catalyst, the total metallic load was… read more here.

Keywords: ring opening; cyclohexane dehydrogenation; content; bimetallic catalysts ... See more keywords
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Selective ring opening of decalin on Rh-Pd/SiO2-Al2O3 bifunctional systems: Catalytic performance and deactivation

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Published in 2018 at "Fuel Processing Technology"

DOI: 10.1016/j.fuproc.2018.04.008

Abstract: Abstract Ring opening of decalin was studied using Rh-Pd(x) catalysts supported on SiO 2 -Al 2 O 3 , prepared by coimpregnation with a variable total metallic content (x = 1, 1.5 and 2 wt%) while maintaining constant… read more here.

Keywords: decalin; ring opening; deactivation; opening decalin ... See more keywords
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Highly selective ring rearrangement of 5-hydroxymethylfurfural to 3-hydroxymethylcyclopentanon catalyzed by non-noble Ni-Fe/Al2O3

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Published in 2021 at "Molecular Catalysis"

DOI: 10.1016/j.mcat.2021.111505

Abstract: Abstract 3-Hydroxymethylcyclopentanone (HCPN) has been regarded as a considerable intermediate for the synthesis of polymers, pesticides and fragrances, which is mainly produced from petrochemical refinery. In recent years, the preparation of HCPN from biomass has… read more here.

Keywords: highly selective; al2o3; selective ring; ring rearrangement ... See more keywords
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E-Selective Ring-Closing Metathesis in α-Helical Stapled Peptides Using Carbocyclic α,α-Disubstituted α-Amino Acids.

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Published in 2022 at "Organic letters"

DOI: 10.1021/acs.orglett.1c04256

Abstract: We present an E-selective ring-closing metathesis reaction in α-helical stapled peptides at positions i and i + 4. The use of two chiral carbocyclic α,α-disubstituted α-amino acids, (1S,3S)-Ac5c3OAll and (1R,3S)-Ac5c3OAll, provides a high E-selectivity of… read more here.

Keywords: selective ring; ring closing; helical stapled; amino acids ... See more keywords
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Insights into highly selective ring expansion of oxaziridines under Lewis base catalysis: a DFT study

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Published in 2019 at "Organic Chemistry Frontiers"

DOI: 10.1039/c8qo01370e

Abstract: The possible mechanism and stereoselectivity of the NHC-catalyzed ring expansion reaction of oxaziridines have been theoretically studied for the first time. read more here.

Keywords: ring expansion; highly selective; expansion oxaziridines; insights highly ... See more keywords
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Lithium achieves sequence selective ring-opening terpolymerisation (ROTERP) of ternary monomer mixtures

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Published in 2022 at "Chemical Science"

DOI: 10.1039/d2sc01776h

Abstract: Heteroatom-containing degradable polymers have strong potential as sustainable replacements for petrochemically derived materials. However, to accelerate and broaden their uptake greater structural diversity and new synthetic methodologies are required. Here we report a sequence selective… read more here.

Keywords: roterp; opening terpolymerisation; terpolymerisation roterp; selective ring ... See more keywords