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Longer titles found: Lewis acid catalysis (view)

searching for Acid catalysis 93 found (153 total)

Quelet reaction (671 words) [view diff] exact match in snippet view article find links to article

Blanc chloromethylation process. The reaction proceeds under strong acid catalysis using HCl; zinc(II) chloride may be used as a catalyst in instances

Arboreol (77 words) [view diff] exact match in snippet view article find links to article

Arboreol is an epoxylignan. Arboreol can be transformed by acid catalysis into gmelanone. Buckingham, John (2 December 1993). Dictionary of Natural Products

Sigmatropic reaction (2,106 words) [view diff] exact match in snippet view article find links to article

True sigmatropic reactions are usually uncatalyzed, although Lewis acid catalysis is possible. Sigmatropic reactions often have transition-metal catalysts

Ortho acid (180 words) [view diff] exact match in snippet view article find links to article

by the Pinner reaction, in which nitriles react with alcohols under acid catalysis: RCN + 3 R'OH → RC(OR')3 + NH3 Historically the prefixes "hypo-", "per-"

Glycosyl donor (488 words) [view diff] exact match in snippet view article find links to article

naturally present in monosaccharides, but it requires activation by acid catalysis in order to function as leaving group (in the Fischer glycosylation)

Biodiesel production (1,930 words) [view diff] exact match in snippet view article find links to article

common. This path has lower reaction times and catalyst cost than those acid catalysis. However, alkaline catalysis has the disadvantage of high sensitivity

Furan resin (736 words) [view diff] exact match in snippet view article find links to article

furan monomer is typically converted to a free-flowing resin with mild acid catalysis. Curing is achieved using strong acid. The term furan resins is not

N-Bromosuccinimide (1,242 words) [view diff] exact match in snippet view article find links to article

(as above) or via acid-catalysis. For example, hexanoyl chloride 1 can be brominated in the alpha-position by NBS using acid catalysis. The reaction of

Dienone–phenol rearrangement (549 words) [view diff] exact match in snippet view article find links to article

rearrangement might happen through the Cope rearrangement. Apart from acid catalysis, the dienone–phenol rearrangement is also possible in presence of base

Fischer indole synthesis (449 words) [view diff] exact match in snippet view article find links to article

resulting diimine forms a cyclic aminoacetal (or aminal), which under acid catalysis eliminates NH3, resulting in the energetically favorable aromatic indole

Isobucaine (109 words) [view diff] exact match in snippet view article find links to article

chloride [98-88-4] hypothetically goes initially to the amide (4'). The acid catalysis used in the reaction leads to an N to O acyl migration to afford isobucaine

Wanzlick equilibrium (799 words) [view diff] exact match in snippet view article find links to article

derivatives quantify acid catalysis and corroborate that tetraaminoolefins may dissociate without adventitious protons. Acid catalysis is however required

Polyamide (762 words) [view diff] exact match in snippet view article find links to article

polyamides: Polyamides can also be synthesized from dinitriles using acid catalysis via an application of the Ritter reaction. This method is applicable

Heteropolymetalate (765 words) [view diff] exact match in snippet view article find links to article

high oxidising ability. Some examples of catalysis are: Homogeneous acid catalysis hydrolysis of propene to give propan-2-ol by H3PMo12O40 and H3PW12O40

Enamine (1,800 words) [view diff] exact match in snippet view article find links to article

or aldehyde species containing an α-hydrogen with secondary amines. Acid catalysis is not always required, if the pKaH of the reacting amine is sufficiently

Hydroiodic acid (358 words) [view diff] no match in snippet view article find links to article

catalysis using iridium - The Cativa process for the manufacture of acetic acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7. Skinner

Ketene cycloaddition (1,180 words) [view diff] exact match in snippet view article find links to article

cycloaddition with ketones and aldehydes to give β-lactones. Lewis acid catalysis is necessary for this process, unless the carbonyl compound possesses

Carboximidate (560 words) [view diff] exact match in snippet view article find links to article

amidines. Aliphatic imidates react with an excess of alcohol under acid catalysis to form orthoesters RC(OR)3, aromatic imidates can also be converted

Lanthanide trifluoromethanesulfonates (924 words) [view diff] case mismatch in snippet view article find links to article

1039/a606484a. Engberts, J., Feringa, B., Keller, E. & Otto, S. 1996, “Lewis-acid Catalysis of Carbon Carbon Bond Forming Reactions in Water”, Recuil des Travaux

B type proanthocyanidin (449 words) [view diff] exact match in snippet view article find links to article

procyanidin-rich grape seed extracts reacted with flavan-3-ols under acid catalysis. Procyanidin C1 Procyanidin C2 A stereoselective synthesis of benzylated

Cativa process (373 words) [view diff] no match in snippet view article find links to article

catalysis using iridium - The Cativa process for the manufacture of acetic acid". Catalysis Today. 58 (4). doi:10.1016/S0920-5861(00)00263-7. Jones, Jane H. (2000)

Organogermanium chemistry (882 words) [view diff] case mismatch in snippet view article find links to article

Franziska (2023). "Anti-Markovnikov Hydrogermylation of Alkenes via Lewis Acid Catalysis". Synthesis. 55 (11): 1792–1798. doi:10.1055/a-2036-3868. ISSN 0039-7881

Ethyl acetate (1,293 words) [view diff] exact match in snippet view article find links to article

+ CH3CH2OH → CH3CO2CH2CH3 + H2O The reaction can be accelerated by acid catalysis and the equilibrium can be shifted to the right by removal of water

Cu Y Zeolite (1,157 words) [view diff] exact match in snippet view article find links to article

the type of substrate. These mechanisms include π complexation and acid catalysis. 1. π Complexation The empty s-orbital of cationic copper forms a sigma

Trichloroacetonitrile (1,725 words) [view diff] exact match in snippet view article find links to article

trichloroacetonitrile in the presence of a base, as well as glycosylations under acid catalysis. Under kinetic control with potassium carbonate as the base, β-trichloroacetimidates

Curtius rearrangement (1,746 words) [view diff] exact match in snippet view article find links to article

"The decomposition of substituted benzazides in acidic solvents, the acid catalysis". J. Am. Chem. Soc. 81: 2007–2012. doi:10.1021/ja01517a055. Fahr, E

Phenol formaldehyde resin (1,509 words) [view diff] no match in snippet view article find links to article

(methylphenols). The polymerization is brought to completion using acid-catalysis such as sulfuric acid, oxalic acid, hydrochloric acid and rarely, sulfonic

Mesaconic acid (301 words) [view diff] no match in snippet view article find links to article

which is hydrolyzed and the resulting acid further isomerized under acid-catalysis to give mesaconic acid. Hydration of mesaconic acid, a conversion catalyzed

Tosylhydrazone (657 words) [view diff] exact match in snippet view article find links to article

synthesised from camphor and tosylhydrazine in ethanol with hydrochloric acid catalysis. Hydrolysis is the reverse reaction of formation with regeneration of

Xylamidine (321 words) [view diff] exact match in snippet view article find links to article

Alternately, one can react primary amine # with m-tolylacetamidine under acid catalysis to produce xylamidine. Fuller RW, Kurz KD, Mason NR, Cohen ML (June

1,3-Cyclohexanedione (284 words) [view diff] exact match in snippet view article find links to article

exists in solution predominantly as the enol tautomer. It reacts under acid catalysis with alcohols to 3-alkoxyenones. Its pKa is 5.26. Treatment of the sodium

Ionone (815 words) [view diff] exact match in snippet view article find links to article

the enolate ion 6 to form pseudoionone 7. The reaction proceeds by acid catalysis where the double bond in 7 opens to form the carbocation 8. A rearrangement

Titanium ethoxide (865 words) [view diff] no match in snippet view article find links to article

the presence of base or acid catalysts for the hydrolysis. Generally acid-catalysis yields a sol where the polymer chains are randomly oriented and linear

Procyanidin (1,718 words) [view diff] no match in snippet view article find links to article

(2001). "Analysis of Proanthocyanidin Cleavage Products Following Acid-Catalysis in the Presence of Excess Phloroglucinol". Journal of Agricultural and

Lactase (2,098 words) [view diff] exact match in snippet view article find links to article

removal of the D-glucose leaving group may be facilitated by Mg-dependent acid catalysis. The enzyme is liberated from the α-galactosyl moiety upon equatorial

Ether (1,839 words) [view diff] exact match in snippet view article find links to article

alkenes. The method is atom-economical: R2C=CR2 + R–OH → R2CH–C(–O–R)–R2 Acid catalysis is required for this reaction. Commericially important ethers prepared

Chymotrypsin (1,100 words) [view diff] exact match in snippet view article find links to article

catalyst for the k-1 reaction. However, evidence for similar general-acid catalysis of the k2 reaction (Tet2) has been controverted; apparently water provides

Tehshik Yoon (1,431 words) [view diff] exact match in snippet view article find links to article

combine the transition metal photoredox catalysis with the chiral Lewis acid catalysis. The combination of these catalysts provided an approach to control

Hemithioacetal (611 words) [view diff] exact match in snippet view article find links to article

{R-CHO + R'-SH <=> R-CH(OH)S-R'}}} Hemithioacetals usually arise via acid catalysis. They typically are intermediates in the formation of dithioacetals

Steven Zimmerman (610 words) [view diff] exact match in snippet view article find links to article

the asymmetric synthesis of amino acids by pyridoxamine enzyme analogues utilizing general base-acid catalysis (1984) Doctoral advisor Ronald Breslow

Glycocyamine (844 words) [view diff] exact match in snippet view article find links to article

significantly higher than that of creatine, which cyclizes to creatinine under acid catalysis. A series of studies showed that a combination of betaine and glycocyamine

Max Planck Institute for Coal Research (815 words) [view diff] exact match in snippet view article find links to article

organocatalysis as well as in transition metal catalysis and Lewis acid catalysis. The Heterogeneous Catalysis Department, led by Ferdi Schüth, is concentrated

P-Phenylenediamine (1,087 words) [view diff] no match in snippet view article find links to article

aniline is converted to diphenyltriazine, which is then converted by acid-catalysis to 4-aminoazobenzene. Hydrogenation of the latter affords PPD. PPD is

Hybrid material (2,464 words) [view diff] exact match in snippet view article find links to article

from base to acid catalysis makes a large difference because base catalysis leads to a more particle-like microstructure while acid catalysis leads to a

Methyl acrylate (1,007 words) [view diff] exact match in snippet view article find links to article

for producing methyl acrylate is esterification with methanol under acid catalysis (sulfuric acid, p-toluenesulfonic acid or acidic ion exchangers.). The

Nylon 1,6 (566 words) [view diff] exact match in snippet view article find links to article

Nylon 1,6 is synthesized from adiponitrile, formaldehyde, and water by acid catalysis. Adiponitrile and formaldehyde (aqueous, paraformaldehyde, or trioxane)

Transalkylation (951 words) [view diff] exact match in snippet view article find links to article

Petroquimica Espanola, S.A. Petresa Harmer, Mark A.; Sun, Qun (2001). "Solid acid catalysis using ion-exchange resins". Applied Catalysis A: General. 221 (1–2):

Abramov reaction (1,098 words) [view diff] exact match in snippet view article find links to article

ethanol, tert-butanol) and non-polar (benzene) solvents may be used. Acid catalysis may be needed for additions of phosphite diesters or for in situ formation

Cyclotriveratrylene (400 words) [view diff] exact match in snippet view article find links to article

molecular host. The compound can be synthesised from veratrole alcohol upon acid catalysis. Operating via the same intermediates, an alternative synthesis involves

2-Imidazoline (902 words) [view diff] exact match in snippet view article find links to article

essentially a cyclic Pinner reaction; it requires high temperatures and acid catalysis and is effective for both alkyl and aryl nitriles. Imidazoline has been

HIV-1 protease (2,197 words) [view diff] exact match in snippet view article find links to article

the two amino acids, while the initially deprotonated Asp25 undergoes acid catalysis to donate its proton to the amino group, making the amino group a better

Reductions with diimide (966 words) [view diff] exact match in snippet view article find links to article

the substrate. The cis isomer is the less stable of the two; however, acid catalysis may speed up equilibration of the trans and cis isomers. (2) Diimide

Baeyer–Villiger oxidation (2,981 words) [view diff] exact match in snippet view article find links to article

Dusselier, Michiel; Jacobs, Pierre A.; Sels, Bert F. (2017). "Lewis acid catalysis on single site Sn centers incorporated into silica hosts". Coordination

Benjamin List (2,065 words) [view diff] exact match in snippet view article find links to article

Benjamin (29 March 2018). "Activation of olefins via asymmetric Brønsted acid catalysis". Science. 359 (6383). American Association for the Advancement of Science

Condensed tannin (1,674 words) [view diff] no match in snippet view article find links to article

(April 2001). "Analysis of Proanthocyanidin Cleavage Products Following Acid-Catalysis in the Presence of Excess Phloroglucinol". Journal of Agricultural and

Eric Meggers (581 words) [view diff] case mismatch in snippet view article find links to article

Zhang, Lilu; Meggers, Eric (2017-02-21). "Steering Asymmetric Lewis Acid Catalysis Exclusively with Octahedral Metal-Centered Chirality". Accounts of Chemical

René Peters (chemist) (1,134 words) [view diff] case mismatch in snippet view article

Thomas; Peters, René (2008-07-07). "Contact Ion Pair Directed Lewis Acid Catalysis: Asymmetric Synthesis of trans ‐Configured β‐Lactones". Angewandte Chemie

Migratory insertion (2,266 words) [view diff] no match in snippet view article find links to article

Catalysis using Iridium - The Cativa Process for the Manufacture of Acetic Acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7. Kissin,

Migratory insertion (2,266 words) [view diff] no match in snippet view article find links to article

Catalysis using Iridium - The Cativa Process for the Manufacture of Acetic Acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7. Kissin,

Cellulose acetate (3,187 words) [view diff] exact match in snippet view article find links to article

degradation of cellulose acetate cigarette filters using controlled-release acid catalysis". Green Chemistry. 14 (8): 2266–2272. doi:10.1039/C2GC16635F. "Welcome

Wilhelm Rudolph Fittig (1,092 words) [view diff] exact match in snippet view article find links to article

rearrangement, whereby 1,2-diols rearrange to aldehydes or ketones under acid catalysis. His work involved the preparation of 2,3-dimethyl-2,3-butanediol (pinacol)

Dimethylaminoethyl acrylate (694 words) [view diff] exact match in snippet view article find links to article

or ethyl acrylate (R = -CH2-CH3) with 2-dimethylaminoethanol under acid catalysis with tin compounds (for example stannoxanes) or titanium compounds (for

Insertion reaction (1,863 words) [view diff] no match in snippet view article find links to article

Catalysis using Iridium - The Cativa Process for the Manufacture of Acetic Acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7. Crabtree

Colin Raston (1,380 words) [view diff] exact match in snippet view article find links to article

any other aldehyde is used and different conditions, including Lewis acid catalysis have been employed to minimise by-products. Raston and co-workers have

Scandium (4,058 words) [view diff] exact match in snippet view article find links to article

ISBN 978-0-85729-280-3. Kobayashi, Shu; Manabe, Kei (2000). "Green Lewis acid catalysis in organic synthesis" (PDF). Pure and Applied Chemistry. 72 (7): 1373–1380

Ene reaction (3,349 words) [view diff] exact match in snippet view article find links to article

Figure 8: Improvements brought to the ene reaction by Lewis acid catalysis

Enantioselective synthesis (4,724 words) [view diff] case mismatch in snippet view article find links to article

Lilu; Meggers, Eric (21 February 2017). "Steering Asymmetric Lewis Acid Catalysis Exclusively with Octahedral Metal-Centered Chirality". Accounts of Chemical

Proanthocyanidin (3,380 words) [view diff] no match in snippet view article find links to article

(2001). "Analysis of Proanthocyanidin Cleavage Products Following Acid-Catalysis in the Presence of Excess Phloroglucinol". Journal of Agricultural and

Phosphine (3,583 words) [view diff] exact match in snippet view article find links to article

tris(cyanoethyl)phosphine: PH3 + 3 CH2=CHZ → P(CH2CH2Z)3 (Z is NO2, CN, or C(O)NH2) Acid catalysis is applicable to hydrophosphination with isobutylene and related analogues:

Neopullulanase (1,129 words) [view diff] exact match in snippet view article find links to article

carboxyl group of a glutamate residue (TAA Glu-230) through generic acid catalysis. The C1 carbon of pullulan is then attacked by a nucleophilic aspartate

Methanol (5,283 words) [view diff] no match in snippet view article find links to article

catalysis using iridium – The Cativa process for the manufacture of acetic acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7. Olsbye,

RNA (7,522 words) [view diff] exact match in snippet view article find links to article

ion promoted cleavage of RNA phosphodiester bonds involves a general acid catalysis by the metal aquo ion on the departure of the leaving group". Journal

Catalytic triad (5,790 words) [view diff] exact match in snippet view article find links to article

bound to the enzyme as an acyl-enzyme intermediate. Although general-acid catalysis for breakdown of the First and Second tetrahedral intermediate may occur

Bovine pancreatic ribonuclease (1,449 words) [view diff] exact match in snippet view article find links to article

PMC 3172371. PMID 21838247. Schmid, FX; Baldwin, RL (October 1978). "Acid catalysis of the formation of the slow-folding species of RNase A: evidence that

Formylation (2,827 words) [view diff] exact match in snippet view article find links to article

Gattermann reaction and Gattermann-Koch reaction. These involve strong acid catalysis and proceed in a manner similar to the Friedel–Crafts reaction. Hydroformylation

Protodeboronation (1,438 words) [view diff] case mismatch in snippet view article find links to article

Mangravite, J. A. "Electrophilic Displacement Reactions. X. General Acid Catalysis in the Protodeboronation of Areneboronic Acids". Can. J. Chem. 1963

Phosphotungstic acid (2,141 words) [view diff] case mismatch in snippet view article find links to article

Chemistry Editor R Bruce King (1994) John Wiley and Sons ISBN 0-471-93620-0 Acid Catalysis Archived 2011-08-11 at the Wayback Machine, Davis Group, Department

Nylon (7,575 words) [view diff] exact match in snippet view article find links to article

Evonik Vestamid L Nylons can also be synthesized from dinitriles using acid catalysis. For example, this method is applicable for preparation of nylon 1,6

Hydrophosphination (2,002 words) [view diff] exact match in snippet view article find links to article

tris(cyanoethyl)phosphine: PH3 + 3 CH2=CHZ → P(CH2CH2Z)3 (Z = NO2, CN, C(O)NH2) Acid catalysis is applicable to hydrophosphination with alkenes that form stable carbocations

Hofmann–Löffler reaction (5,291 words) [view diff] exact match in snippet view article find links to article

higher acid concentration decreases the rate of the initiation step, the acid catalysis involves acceleration of the propagation steps and/or retardation of

Glucose (12,967 words) [view diff] exact match in snippet view article find links to article

equilibrium and interconvert, and the interconversion is much more rapid with acid catalysis. The other open-chain isomer L-glucose similarly gives rise to four

Βk-2C-B (2,916 words) [view diff] exact match in snippet view article find links to article

can be converted back to βk-2C-B by imine hydrolysis: a process where acid catalysis is possible, but not an absolute requirement. The thermal decomposition

Iodine (11,802 words) [view diff] no match in snippet view article find links to article

catalysis using iridium - The Cativa process for the manufacture of acetic acid". Catalysis Today. 58 (4): 293–307. doi:10.1016/S0920-5861(00)00263-7. The ammonia

Diels–Alder reaction (7,087 words) [view diff] exact match in snippet view article find links to article

L. (1970). "Stereochemistry of the Diels–Alder reaction. II. Lewis acid catalysis of syn-anti isomerism". Journal of the American Chemical Society. 92

Protecting group (6,755 words) [view diff] exact match in snippet view article find links to article

of S,S-acetals normally follows analogously to the O,O-acetals with acid catalysis from a dithiol and the carbonyl compound. Because of the greater stability

Hepatitis delta virus ribozyme (2,793 words) [view diff] exact match in snippet view article find links to article

General acid catalysis by cytosine 75, in which the protonated form of the C donates a proton to the leaving group during catalysis

Gut-specific homing (2,733 words) [view diff] exact match in snippet view article find links to article

adhesins on the cell surface suggesting that the vitamin A → retinoic acid catalysis was important. This, in theory, should increase the homing ability of

Hammerhead ribozyme (4,559 words) [view diff] exact match in snippet view article find links to article

base in the cleavage reaction, and the 2'-OH of G8 is positioned for acid catalysis. Potentially "active" hydrogen bonds are shown as orange dotted lines

Alkylation unit (4,629 words) [view diff] exact match in snippet view article find links to article

100 °C. They exhibit strong acid properties, so they can be used as acid catalysis without using conventional liquid acids. Ionic liquids are salts in

2-Carboxybenzaldehyde (1,666 words) [view diff] exact match in snippet view article find links to article

hydrazine or alkylhydrazines, 1(2H)-phthalenazinones are obtained under acid catalysis with K10-montmorillonite and microwave irradiation in high yield. Phthalazinones

Asymmetric hydrogenation (6,351 words) [view diff] exact match in snippet view article find links to article

or certain cyclohexanone-fused pyridines. Similarly, chiral Brønsted acid catalysis with a Hantzsh ester as a hydride source is effective for some 2-alkyl

O-GlcNAc (12,376 words) [view diff] case mismatch in snippet view article find links to article

"O-GlcNAcase Catalyzes Cleavage of Thioglycosides Without General Acid Catalysis". Journal of the American Chemical Society. 127 (49): 17202–3. doi:10

Metal–organic framework (21,288 words) [view diff] exact match in snippet view article find links to article

Horike S, Dinca M, Tamaki K, Long JR (May 2008). "Size-selective Lewis acid catalysis in a microporous metal-organic framework with exposed Mn2+ coordination