Results 11 to 20 of about 103,808 (305)

Crystal structure of diethyl (E)-2-[(benzofuran-2-yl)methylidene]succinate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
The title compound, C17H18O5, was synthesized by a base-free catalytic Wittig reaction. The molecule consists of a diethyl itaconate unit, which is connected via the C=C double bond to a benzofuran moiety. The benzofuran ring system (r.m.s. deviation = 0.
Marie-Luis Schirmer   +2 more
doaj   +1 more source

Machine learnt patterns in rhodium-catalysed asymmetric Michael addition using chiral diene ligands

open access: yesResults in Chemistry, 2022
Interpretable featurisation allows Quantitative Structure-Property Relationships (QSPR) between chiral diene ligand structures and product stereoselectivities in rhodium-catalysed asymmetric Michael additions (RhCASA).
Benjamin Owen   +4 more
doaj   +1 more source

[4 + 2] Cycloadditions of diphenylketene with a highly substituted 1,3-diene [PDF]

open access: yes, 1987
Diphenylketene (2) undergoes [4 + 2] cycloadditions with the s-cis fixed diene (1) to give the dihydropyran (3) and the cyclohexenone (4)
Heigl, Ulrich W., Mayr, Herbert
core   +1 more source

Reactivity of (1-methoxycarbonylpentadienyl)iron(1+) cations with hydride, methyl, and nitrogen nucleophiles [PDF]

open access: yes, 2017
The reaction of tricarbonyl and (dicarbonyl)triphenylphosphine (1-methoxycarbonyl-pentadientyl)iron(1+) cations 7 and 8 with methyl lithium, NaBH3CN, or potassium phthalimide affords (pentenediyl)iron complexes 9a-c and 11a-b, while reaction with ...
Anobick Sar   +58 more
core   +2 more sources

Research progress in modification of natural rubber/ethylene-propylene diene monomer blending rubber

open access: yesHecheng xiangjiao gongye, 2022
The reason for poor compatibility and poor covulcanization of natural rubber and ethylene-propylene diene monomer was systematically summarized, and the technological development in blending modification of natural rubber/ethylene-propylene diene monomer
CHENG An-ren; JIAO Yang; LU Yong-jun; GUO Yue-ying; WANG Lian-cai; DAI Pei
doaj   +1 more source

The Metallacyclopentane-Olefin Interchange Reaction [PDF]

open access: yes, 1977
Tris(triphenylphosphine)tetramethylenenickel(II) and biscyclopentadienyltetramethylenetitanium, prepared from the reaction of a 1,4-dilithiobutane and the transition metal dihalides react with olefins to produce substituted metallacyclopentanes; the ...
Grubbs, Robert H., Miyashita, Akira
core   +1 more source

Sequential Diels–Alder/[3,3]-sigmatropic rearrangement reactions of β-nitrostyrene with 3-methyl-1,3-pentadiene

open access: yesBeilstein Journal of Organic Chemistry, 2013
The tin(IV)-catalyzed reaction of β-nitrostyrene with (E)-3-methyl-1,3-pentadiene in toluene afforded two major nitronic ester cycloadducts in 27% and 29% yield that arise from the reaction at the less substituted diene double bond.
Peter A. Wade   +3 more
doaj   +1 more source

Research progress in catalytic system of ethylene/conjugated diene copolymerization

open access: yesHecheng xiangjiao gongye, 2023
The copolymerization techniques of ethylene and conjugated diene, such as butadiene and isoprene, were summarized. The structure and performance characteristics of polymers obtained from different catalytic systems were reviewed with 26 references.
SHEN He-yu1,2, LI Mei1, XU Jin-guo1, LIANG Sheng-biao1, TAO Jie1, HAO Xing-tian1
doaj   +1 more source

Crystal structure of (η2,η2-cycloocta-1,5-diene)(η5-indenyl)cobalt(I)

open access: yesIUCrData, 2016
The title compound, [Co(C8H12)(C9H7)], was synthesized by the reaction of metallated 2-H-indene with CoCl(PPh3)3 and 1,5-cyclooctadiene in tetrahydrofuran/toluene.
Phillip Jungk   +2 more
doaj   +1 more source

Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. [PDF]

open access: yes, 2017
Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels-Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones from readily prepared dienes, commodity acid chlorides ...
Abbasov, Mikail E   +3 more
core   +2 more sources

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