Results 21 to 30 of about 104,315 (284)
Iodoaminations of Alkenes [PDF]
Synthesis, 2016 The activation of alkenes and their subsequent functionalization is a frequently used methodology in synthetic chemistry. This review highlights recent iodine-mediated aminations and elaborates on the various strategies to bring about regio- or stereoselective transformations.
Wirth, Thomas, Mizar, Pushpak
openaire +2 more sources
[2+2]-cycloadditions of alkenes with the triphenylallenyl cation [PDF]
, 1984 The triphenylallenyl cation (8), generated from triphenylpropynol (7) and FSO3H, reacts with alkenes to give the allyl cations 12, which may be deprotonated to yield the methyleneccylobutenes 14.
Deno +13 more
core +1 more source
High Ethylene and Propylene in an Area Dominated by Oil Production
Atmosphere, 2020 We measured the spatial distribution and composition of ozone-forming hydrocarbons, alcohols, and carbonyls in Utah’s Uinta Basin during the winter months of 2019 and 2020. The Uinta Basin contains about 10,000 producing oil and gas wells. Snow cover and
Seth N. Lyman +4 more
doaj +1 more source
Access to cyclopropanes with geminal trifluoromethyl and difluoromethylphosphonate groups
Beilstein Journal of Organic Chemistry, 2023 A synthetic route to the bench-stable fluorinated masked carbene reagent diethyl 2-diazo-1,1,3,3,3-pentafluoropropylphosphonate, bearing a trifluoromethyl and a difluoromethyl group is reported for the first time.
Ita Hajdin +5 more
doaj +1 more source
Catalytic Enantioselective Addition of Alkylzirconium Reagents to Aliphatic Aldehydes
Molecules, 2021 A catalytic methodology for the enantioselective addition of alkylzirconium reagents to aliphatic aldehydes is reported here. The versatile and readily accessible chiral Ph-BINMOL ligand, in the presence of Ti(OiPr)4 and a zinc salt, facilitates the ...
Jade Vaccari +3 more
doaj +1 more source
A Simple Nickel Catalyst Enabling an E‐Selective Alkyne Semihydrogenation [PDF]
, 2019 Stereoselective alkyne semihydrogenations are attractive approaches to alkenes, which are key building blocks for synthesis. With regards to the most atom economic reducing agent dihydrogen (H 2 ), only few catalysts for the challenging E ‐selective ...
Kaewmee, Benyapa +3 more
core +1 more source
Molecules, 2021 A synthetic route to new heterocyclic 1,1-donor–acceptor-substituted alkenes starting with N-methyl-acridone, xanthone, and thioxanthone was investigated, leading to the acridone- and xanthone-derived products methyl 2-methoxy-2-(10-methylacridin-9 (10H)-
Tim Lippold +2 more
doaj +1 more source
Application of Transition Metal Catalysis to Small Molecule Synthesis [PDF]
, 2006 Over the past decade, transition metal catalysis has developed into a new field in organic synthesis, enabling numerous synthetic transformations that were previously not feasible.
Morrill, Christie
core +1 more source
Characterization of the novel ene reductase Ppo-Er1 from paenibacillus polymyxa [PDF]
, 2020 Ene reductases enable the asymmetric hydrogenation of activated alkenes allowing the manufacture of valuable chiral products. The enzymes complement existing metal- and organocatalytic approaches for the stereoselective reduction of activated C=C double ...
Aregger, David +2 more
core +1 more source
Recent Advances on the Halo- and Cyano-Trifluoromethylation of Alkenes and Alkynes
Molecules, 2021 Incorporation of fluorine into organic molecules is a well-established strategy in the design of advanced materials, agrochemicals, and pharmaceuticals. Among numerous modern synthetic approaches, functionalization of unsaturated bonds with simultaneous ...
Bo Fu +8 more
doaj +1 more source