Search results for "Hexene"
showing 10 items of 61 documents
Studies on ethylene/1-hexene copolymerization over the zirconocene catalyst supported on MAO-modified MgCl2(THF)2. The effect of copolymerization con…
2002
Badania dotyczą układu katalitycznego MgCl2(THF)2/MAO/Cp2ZrCl2/MAO (MAO — metyloaluminoksan). Stwierdzono, że zarówno aktywność tego układu katalitycznego, jak i właściwości kopolimerów w znacznym stopniu zależą od stosunku molowego Al:Zr (zmienianego w przedziae 1500—7000) i od temperatury kopolimeryzacji (tabele 1 i 2), natomiast wpływ czasu kopolimeryzacji jest mniejszy (tabela 3). Aktywność katalizatora oraz zawartość 1-heksenu wbudowanego do kopolimeru zwiększają się ze wzrostem temperatury i stosunku Al:Zr, a jednocześnie maleje ciężar cząsteczkowy i temperatura topnienia produktów. Ustalono także, że osadzenie katalizatora cyrkonocenowego na stosowanym nośniku powoduje zwiększenie je…
Fluorine-Containing Functionalized Cyclopentene Scaffolds Through Ring Contraction and Deoxofluorination of Various Substituted Cyclohexenes
2018
Computer-Aided Rational Design of Catalytic Antibodies: The 1F7 Case.
2007
Synthesis and biological evaluation of the new ring system benzo[f]pyrimido[1,2-d][1,2,3]triazolo[1,5-a][1,4]diazepine and its cycloalkane and cycloa…
2021
Derivatives of the new ring system benzo[f]pyrimido[1,2-d][1,2,3]triazolo[1,5-a][1,4]diazepinone and its cycloalkane and cycloalkene condensed analogues have been conveniently synthesized through a three-step reaction sequence. An atom-economical, one-pot, three-step cascade process engaging five reactive centers (amide, amine, carbonyl, azide, and alkyne) has been performed for the synthesis of alicyclic derivatives of quinazolinotriazolobenzodiazepine using cyclohexane, cyclohexene, and norbornene β-amino amides. The stereochemistry and relative configurations of the synthesized compounds were determined by 1D and 2D NMR spectroscopy and X-ray crystallography. The reaction was also perfor…
Radioactively labelled epoxides part II. (1) tritium labelled cyclohexene oxide, transstilbene oxide and phenanthrene 9,10-oxide
1980
Tritium labelled cyclohexene oxide, trans-stilbene oxide and phenanthrene 9,10-oxide were prepared with specific activities of 0.7 - 1.1 mCi per mmole starting with monoor diketo compounds. Tritium was introduced by reducing the ketone precursors with tritiated complex metal hydrides. The resulting alcohols were transformed to the epoxides by methods described for the unlabelled compounds. The syntheses require only two or three steps and yield cyclohexene oxide, trans-stilbene oxide and phenanthrene 9,10-oxide, important substrates for the study of epoxide hydratase and glutathione S-transferases in high radiochemical purity.
Isobaric Vapor−Liquid Equilibria for Binary and Ternary Mixtures with Cyclohexane, Cyclohexene, and Methyl Isobutyl Ketone at 100 kPa
2010
Consistent vapor−liquid equilibrium (VLE) data at 100 kPa have been determined for the ternary system cyclohexane + cyclohexene + methyl isobutyl ketone and two constituent binary systems: cyclohexane + methyl isobutyl ketone and cyclohexene + methyl isobutyl ketone. Both binary systems show positive deviations from ideal behavior and do not present an azeotrope. The VLE data have been correlated by the Wilson, UNIQUAC, and NRTL equations. The ternary system does not present an azeotrope and is well predicted from binary interaction parameters. Prediction with the UNIFAC method has also been obtained.
Selective Synthesis of New Fluorinated Alicyclic β-Amino Ester Stereoisomers
2011
New fluorinated alicyclic β-amino ester stereoisomers with a cyclohexene or cyclohexane skeleton were prepared from cis- or trans-2-aminocyclohex-3-enecarboxylic acids in five or six steps through a regio- and stereoselective hydroxylation and hydroxy–fluorine exchange. Fluorinated aminoester enantiomers were synthesized from enantiopure cis- or trans-2-aminocyclohexenecarboxylic acid (prepared byenzymatic resolution of the racemic substances).
Synthesis and properties of polymers with unusual structure
1985
This lecture summarize some recent results of our current research. The first part describes the homopolymerization and copolymerization of a monocyclic and two bicyclic unsaturated acetals. In this way polyacetals with 1,4-cis-butadiene units and cyclohexene units respectively are obtained. Secondly, the N-substitution of polyamides is described. By N-metalation and subsequent alkylation comb-like polyamides are available. Longer branches cause a side-chain crystallinity. The anionic “grafting-from” technique forms irregular branched polyamides. By termination reaction between living ends of poly(2-isopropenylnaphthalene) and suitable electrophiles new macromonomers are available. The last…
An insight into the synthesis of novel aryl-substituted alicyclic β-amino acid derivatives through substrate-directed palladium-catalysed regio- and …
2015
Novel aryl-substituted alicyclic β-amino acid derivatives were synthesized through substrate-determined palladium-catalysed cross-coupling of aryl iodides with five- or six-membered cycloalkene β-amino esters. The arylations were investigated with different catalysts, solvents, bases and aryl halides, and with some cyclohexene 2-aminocarboxylate isomers. The stereochemistry and the position of the ring olefinic bond of the starting 2-aminocycloalkanecarboxylate influenced the coupling reaction, and predetermined the structure of the arylated product.