ReactionsAlkenesKetonesSTRATCOTolueneEnantioselectiveAromaticDuPont Clean TechnologiesAlkylateCatalystsSulfuric acidCatalystReactionHydrogen sulfideAlcoholsMethanolReductionGasolineAsymmetricCytotoxicPetroleumProcessesUndergoEthersExposureSelectiveNucleophilicTerminalProcessTechnologyMethodsProductionMedicineAlkylating agentsOrderMethodCriticalClass
Reactions9
- The alkylation of phenols is particularly straightforward since it is subject to fewer competing reactions. (wikipedia.org)
- Phosphotungstic acid (PTA) has gained much attention in recent years as a solid catalyst for various alkylation reactions. (etsu.edu)
- I. Asymmetric Alkylation Reactions of Chiral Imide Enolates. (caltech.edu)
- In this thesis an attempt has been made to compare the catalytic activity of some medium and large pore zeolites in a few alkylation and acylation reactions. (cusat.ac.in)
- The influence of various parameters such as non-framework cations, Si/AI ratio of zeolites, temperature of the reaction, catalyst concentration, molar ratio of the reactants and recycling of the catalysts were also examined upon the conversion of reactants and the formation of the desired products in the alkylation / acylation reactions.The general conclusions drawn by us from the results obtained are summarized in the last chapter of the thesis. (cusat.ac.in)
- Zeolite beta offers interesting opportunities as a potential catalyst in alkylation reactions and the area of catalysis by medium and large pore zeolites is very fascinating and there is plenty of scope for further research in this field. (cusat.ac.in)
- Oxazinanones as chiral auxiliaries: synthesis and evaluation in enolate alkylations and aldol reactions. (ox.ac.uk)
- N-acyl derivatives of oxazinanones undergo stereoselective enolate alkylation reactions, with higher stereoselectivities observed for the enolate alkylation of (R)-N-propanoyl-4-iso-propyl-6,6-dimethyl-oxazinan-2-one than the corresponding Evans oxazolidin-2-one. (ox.ac.uk)
- Although many C-H functionalization reactions involve C(sp 3)-C(sp 2) coupling, there is a growing demand for C-H alkylation reactions, wherein sp 3 C-H bonds are replaced with sp 3 C-alkyl groups. (princeton.edu)
Alkenes4
- The largest example of this takes place in the alkylation units of petrochemical plants, which convert low-molecular-weight alkenes into high octane gasoline components. (wikipedia.org)
- Obtained superacidic catalyst demonstrated high catalytic activity in liquid-phase alkylation of benzene by various alkenes. (etsu.edu)
- Monodentate phosphorus ligands have been found to enable the palladium-catalyzed allylic C-H alkylation reaction of terminal alkenes with a wide variety of carbon nucleophiles. (figshare.com)
- Moreover, an asymmetric allylic C-H alkylation of terminal alkenes with pyrazol-5-ones has been established in the presence of chiral phosphoramidite ligand and chiral phosphoric acid as co-catalyst. (figshare.com)
Ketones3
- An ionic cobalt-PNP complex enables an efficient α-alkylation of ketones with primary alcohols. (organic-chemistry.org)
- Chiral Phosphoric-Acid-Catalyzed Regioselective and Enantioselective C7-Friedel-Crafts Alkylation of 4-Aminoindoles with Trifluoromethyl Ketones. (bvsalud.org)
- A highly regioselective and enantioselective C7-Friedel-Crafts alkylation of 4-aminoindoles with trifluoromethyl ketones promoted by a spirocyclic phosphoric acid was developed. (bvsalud.org)
STRATCO7
- The contract includes the license and engineering design packages for the STRATCO® alkylation and MECS® SAR units. (prweb.com)
- The grassroots refinery complex, with the addition of STRATCO® alkylation technology, will allow Hengli to produce a high quality alkylate product (used as a blending component in the gasoline pool) from a 100% isobutylene feed stream. (prweb.com)
- DuPont is pleased to provide Hengli Petrochemical with our world-class sulfuric acid alkylation technology to improve the overall gasoline pool from the refinery," said Kevin Bockwinkel, global business manager for the STRATCO® Alkylation Technology. (prweb.com)
- As part of DuPont's commitment to innovation, the alkylation unit at Hengli will utilize the patented XP2 technology in the STRATCO® Contactor™ reactor. (prweb.com)
- STRATCO® alkylation technology is licensed and marketed by DuPont as part of its Clean Technologies portfolio in Overland Park, Kansas. (prweb.com)
- Diwakar Rana is the Research Investigator at DuPont Clean Technologies for the STRATCO alkylation business. (hydrocarbonprocessing.com)
- As a responsible supplier and partner to the metal, fertilizer, chemical, petrochemical and oil refining industries, our technology portfolio includes MECS® sulfuric acid production, STRATCO® alkylation, BELCO® wet scrubbing and IsoTherming® hydroprocessing. (elessentct.com)
Toluene3
- Selective acid-base poisoning of the alkylation of toluene with methanol was studied over alkali and alkaline-earth exchanged Y zeolites. (tue.nl)
- This zeolite was deactivated only by co-feeding 3,5-dimethyl pyridine, thereby indicating that exclusively acid sites are involved in the ring alkylation of toluene with methanol. (tue.nl)
- Thus, selective poisoning results and sample characterization showed that bimolecular side-chain alkylation reaction on CsY requires a specific surface acid-base pairs configuration not only for activating toluene and methanol, but also for promoting the rate-limiting step. (tue.nl)
Enantioselective1
- Doyle, AG & Jacobsen, EN 2005, ' Enantioselective alkylations of tributyltin enolates catalyzed by Cr(salen)CI: Access to enantiomerically enriched all-carbon quaternary centers ', Journal of the American Chemical Society , vol. 127, no. 1, pp. 62-63. (princeton.edu)
Aromatic2
DuPont Clean Technologies3
- PRWEB) March 08, 2016 -- DuPont Clean Technologies (DuPont) is pleased to announce that Hengli Petrochemical Company (Hengli), based in Dalian, China, has awarded DuPont a contract to supply the alkylation and spent acid regeneration (SAR) technologies for the new, grassroots refinery in the Changxing Island Harbor Industrial Zone. (prweb.com)
- Jason Nunez is a Senior Technical Service Engineer at DuPont Clean Technologies for the alkylation and hydroprocessing businesses. (hydrocarbonprocessing.com)
- Shane Presley is the Technical Service and Development Manager at DuPont Clean Technologies for the alkylation and hydroprocessing businesses. (hydrocarbonprocessing.com)
Alkylate1
- The unique feed stream (100-percent isobutylene) available from the Hengli Petrochemical facility marks the beginning of a new era for alkylation in the gasoline market as the butane-to-alkylate movement grows around the world. (prweb.com)
Catalysts2
- Structure-selectivity studies on catalysts for the phase-transfer catalysed asymmetric alkylation of glycine imine esters. (buchler-gmbh.com)
- X] L. FAN, I. NAKAMURA, S. ISHIDA AND K. FUJIMOTO: "Supercritical-Phase Alkylation Reaction on Solid Acid Catalysts: Mechanistic Study and Catalyst Development", IND. (epo.org)
Sulfuric acid1
- In Part 1 of this two-part series, recent technology developments to convert hydrofluoric acid (HF) alkylation to sulfuric acid alkylation were discussed. (hydrocarbonprocessing.com)
Catalyst3
- WO0196013A1 ] A method for reactivating a solid alkylation catalyst is provided which can be performed within a reactor that contains the alkylation catalyst or outside the reactor. (epo.org)
- Monoprotected amino acid ligands significantly promote this reaction, enabling the development of a practical C-H alkylation reaction using 0.5 mol % Pd catalyst. (mysciencework.com)
- His research on engineered zeolites led to the development of the breakthrough solid-acid alkylation catalyst ExSact, which is being licensed as the K-SAAT™ process by KBR. (hydrocarbonprocessing.com)
Reaction2
- Alkylation is a chemical reaction that entails transfer of an alkyl group. (wikipedia.org)
- The reaction constitutes the first transition-metal-catalyzed system for α-alkylation of carbonyl substrates with this important class of electrophiles, providing access to five-, six-, and seven-membered ring ketone products bearing α-quaternary stereocenters in high enantioselectivity and synthetically useful yields. (princeton.edu)
Hydrogen sulfide1
- To clarify why the men fell into the lake, a chemical analysis for hydrogen sulfide was carried out using the extractive alkylation technique combined with gas chromatography/mass spectrometry. (who.int)
Alcohols3
- Industry often relies on green chemistry methods involving alkylation of amines with alcohols, the byproduct being water. (wikipedia.org)
- Ph-O-Me + Me-SO4-}}} (with Na+ as a spectator ion) More complex alkylation of a alcohols and phenols involve ethoxylation. (wikipedia.org)
- More complex alkylation of a alcohols and phenols involve ethoxylation . (wikipedia.org)
Methanol1
- For example, most methyl amines are prepared by alkylation of ammonia with methanol. (wikipedia.org)
Reduction2
- The [IrCl(cod)] 2 catalyzed α-alkylation of substituted acetophenones with solketal followed by reduction and iron mediated cyclization provides 2,5-disubstituted tetrahydrofurans. (rsc.org)
- OT binds strongly to plasma proteins, but a reduction/alkylation (R/A) procedure breaks this bond, enabling ample detection of total OT. (nature.com)
Gasoline1
- For upgrading of petroleum, alkylation produces a premium blending stock for gasoline. (wikipedia.org)
Asymmetric1
- The catalytic asymmetric α-alkylation of tributyltin enolates with a range of primary alkyl halides is catalyzed by a chiral Cr(salen) complex. (princeton.edu)
Cytotoxic2
- Reactive and transient QMs and related electrophiles are formed during the metabolic activation of cytotoxic and genotoxic agents and may lead to DNA alkylation. (aacrjournals.org)
- Cytotoxic drugs induce alkylation of DNA. (medscape.com)
Petroleum1
- An estimated 8,000-10,000 metric tons of fluorspar are recovered each year from uranium enrichment, stainless steel pickling, and petroleum alkylation. (cdc.gov)
Processes1
- N-, P-, and S-alkylation are important processes for the formation of carbon-nitrogen, carbon-phosphorus, and carbon-sulfur bonds, Amines are readily alkylated. (wikipedia.org)
Undergo1
- Thioethers undergo alkylation to give sulfonium ions. (wikipedia.org)
Ethers1
- The sp 3 C-H alkylation is highly selective for the α-C-H of amines, ethers and sulphides, which are commonly found in pharmaceutically relevant architectures. (princeton.edu)
Exposure1
- We found that disruption of the yeast Shu complex leads to cellular death specifically upon exposure to alkylation induced DNA damage. (nih.gov)
Selective1
- Here we describe a polarity-match-based selective sp 3 C-H alkylation via the combination of photoredox, nickel and hydrogen-atom transfer catalysis. (princeton.edu)
Nucleophilic2
- The Kumada coupling employs both a nucleophilic alkylation step subsequent to the oxidative addition of the aryl halide (L = Ligand , Ar = Aryl ). (wikipedia.org)
- The inversion of stereochemistry in the C-H alkylation step is consistent with a redox-neutral SN2 nucleophilic ring-opening process as opposed to a Pd(II)/Pd(IV) pathway. (mysciencework.com)
Terminal2
- Pd(II)-catalyzed ortho-alkylation of benzoic acids with both terminal and internal epoxides affords 3,4-dihydroisocoumarins in one step. (mysciencework.com)
- Pd(II)-catalyzed ortho-alkylation of benzoic acids with both terminal and internal epoxides affords 3,4-dihydroisocoumarins i. (mysciencework.com)
Process1
- C-alkylation is a process for the formation of carbon-carbon bonds. (wikipedia.org)
Technology1
- DuPont is the world leader in alkylation technology with over 90 units licensed and with more than 800,000 BPSD (31,400 kmta) of installed capacity. (prweb.com)
Methods1
- Specific attention was given to control methods for hydrogen-fluoride (7664393) (HF) alkylation units. (cdc.gov)
Production1
- La production d'oléfines en C4-C6 par oligomérisation-craquage de propène qui diminue rapidement avec le temps se produit essentiellement dans les canaux sinusoïdaux, tandis que les produits non désorbables "coke" seraient formés dans les supercages. (sudoc.fr)
Medicine1
- In medicine, alkylation of DNA is used in chemotherapy to damage the DNA of cancer cells. (wikipedia.org)
Alkylating agents1
- Alkylating agents are reagents for effecting alkylation. (wikipedia.org)
Order1
- The rate of alkylation follows the order tertiary amine (wikipedia.org)
Method1
- Hydroamination is another green method for N-alkylation. (wikipedia.org)
Critical1
- However, whether C3 plays a critical role in alkylation-induced retinal degeneration is unclear. (biomedcentral.com)
Class1
- Alkylation is accomplished with the class of drugs called alkylating antineoplastic agents. (wikipedia.org)