Tag: 200-300

Cationic DABCO-Based Catalyst for Site-Selective C-H Alkylation via Photoinduced Hydrogen-Atom Transfer was written by Matsumoto, Akira;Yamamoto, Masanori;Maruoka, Keiji. And the article was included in ACS Catalysis in 2022.Application of 3063-94-3 The following contents are mentioned in the article:

A series of hydrogen-atom transfer (HAT) catalysts based on the readily available and tunable 1,4-diazabicyclo[2.2.2]octane (DABCO) structure was designed, and their photoinduced HAT catalysis ability was demonstrated. The combination of HAT catalyst with an acridinium-based organophotoredox catalyst enabled efficient and site-selective C-H alkylation of substrates ranging from unactivated hydrocarbons to complex mols. Notably, a HAT catalyst with addnl. substituents adjacent to a nitrogen atom further improved the site selectivity. Mechanistic studies suggested that the N-substituent of the catalyst played a crucial role, assisting in the generation of a dicationic aminium radical as an active species for the HAT process. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Application of 3063-94-3).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Application of 3063-94-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthetic studies directed toward cembranolides. Synthesis of the basic nucleus of crassin acetate was written by Dauben, William G.;Saugier, R. Kent;Fleischhauer, Ilona. And the article was included in Journal of Organic Chemistry in 1985.SDS of cas: 37905-02-5 The following contents are mentioned in the article:

A stereospecific synthesis of the basic crassin acetate nucleus, erythro-1-(hydroxymethyl)-14-hydroxy-4,8,12-trimethylcyclotetradeca-(E,E,E)-3,7,11-triene, was achieved. Stereospecific syntheses of the 2 precursors to this ring system, (E,E)-3,7-dimethyl-9-(phenylthio)nona-3,7-dienal and (E)-2,8-bis(trimethylsiloxy)-2,7-dimethyloct-6-en-3-one were developed. Aldol condensation of these 2 compounds gave erythro-9-hydroxy-10-[1-oxo-2-methyl-2-(trimethylsiloxy)propyl]-1-(phenylthio)-14-(trimethylsiloxy)-3,7,13-trimethyltetradeca-(E,E,E)-2,6,12-triene, which was cyclized to the titled 14-membered ring system in several steps. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5SDS of cas: 37905-02-5).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.SDS of cas: 37905-02-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Surface metabolic composition of berries collected from 13 Bulgarian grapevine plants was written by Todorova, I. T.;Batovska, D. I.;Parushev, S. P.;Djakova, G. J.;Popov, S. S.. And the article was included in Natural Product Research in 2010.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

The surface metabolic composition of berries, collected from the Bulgarian grapevine variety Storgozia, and 12 of its seedlings were studied by GC/MS. Diverse surface metabolites were identified. The main components were long chain n-alkanes, terpenoids, and esterified long-chain fatty acids. Among them, the terpenoids were most abundant, including, as are typical for plants, sesquiterpenoids, diterpenoids and triterpenoids. Cyperene, a sesquiterpene hydrocarbon, was identified for the first time in grapes. This compound and most of the other identified metabolites are known to possess biol. functions that most probably contribute to the quality of grape berries and their defenses against biotic and abiotic stressors. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Recommanded Product: 5444-75-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ti(III)-Catalyzed Cyclizations of Ketoepoxypolyprenes: Control over the Number of Rings and Unexpected Stereoselectivities was written by Morcillo, Sara P.;Miguel, Delia;Resa, Sandra;Martin-Lasanta, Ana;Millan, Alba;Choquesillo-Lazarte, Duane;Garcia-Ruiz, Juan M.;Mota, Antonio J.;Justicia, Jose;Cuerva, Juan M.. And the article was included in Journal of the American Chemical Society in 2014.Category: esters-buliding-blocks The following contents are mentioned in the article:

We describe a new strategy to control the number of cyclization steps in bioinspired radical (poly)cyclizations involving epoxypolyenes containing keto units positioned along the polyene chain. This approach provides an unprecedentedly straightforward access to natural terpenoids with pendant unsaturated side chains. Addnl., in the case of bi- and tricyclizations, decalins with cis stereochem. have been obtained as a consequence of the presence of the ketone. The preferential formation of cis-fused adducts was rationalized using DFT calculations This result is completely unprecedented in biomimetic cyclizations and permits the access to natural terpenoids with this stereochem., as well as to non-natural analogs. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Category: esters-buliding-blocks).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Umpolung of π-allylpalladium intermediates. A chemoselective reductive elimination of diols was written by Trost, Barry M.;Tometzki, Gerald B.. And the article was included in Journal of Organic Chemistry in 1988.Application of 50767-78-7 The following contents are mentioned in the article:

Enediol dicarbonates undergo reductive elimination to form conjugated dienes by using a catalytic amount of a Pd(0) complex, wherein either the alkoxide liberated from the carbonate or triisopropyl phosphite serves as a stoichiometric reducing agent. The reaction is highly chemoselective with the following functional groups showing compatibility: aldehyde, ketone, ester, alkyl bromide, conjugated enone, olefin, acetylene, and hydroxyl. The reaction preferentially forms E-dienes. An umpolung of the electrophilic π-allylpalladium complex to a nucleophilic one is proposed to account for this unusual reductive elimination. This new type of behavior potentially expands greatly the synthetic applications of π-allylpalladium intermediates in synthesis. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Application of 50767-78-7).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Application of 50767-78-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Stereocontrolled synthesis of vitamin A through a double elimination reaction. A novel convergent C₁₀ + C₁₀ route was written by Otera, Junzo;Misawa, Hiromitsu;Onishi, Takashi;Suzuki, Shigeaki;Fujita, Yoshiji. And the article was included in Journal of Organic Chemistry in 1986.Safety of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

The first convergent C₁₀ + C₁₀ route for vitamin A has been developed. The double elimination reaction of β-alkoxy I (R = tetrahydropyranyl, 4-methyltetrahydropyranyl, MeCHOEt, CH₂OMe) or δ-halo sulfones II (R¹ = Cl, Br) proceeds with excellent stereocontrol to afford the all-trans or 13-cis isomers of 90-95% purity. The double elimination reaction of I is initiated by deprotonation of an allylic hydrogen whereas the reaction II proceeds through the Michael addition of KOMe. Nevertheless, formation of the reactive intermediate III under mild conditions is crucial to achieving a smooth double elimination reaction in both cases. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Safety of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Safety of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Methoxy(phenylthio)methane as an ambi-equivalent of a methoxy- or (phenylthio)methylene 1,1-dipole was written by Sato, Tsuneo;Okura, Shuji;Otera, Junzo;Nozaki, Hitoshi. And the article was included in Tetrahedron Letters in 1987.HPLC of Formula: 50767-78-7 The following contents are mentioned in the article:

MeOCHRSPh [R = (CH₂)₈H, (CH₂)₈OSiMe₂CMe₃, CH₂CH:CMe₂, Ph], prepared by alkylation of MeOCH₂SPh, are allylated by R¹CR²:CHR³CH₂SnBu₃ (R¹-R³ = H; R¹ = R² = H, R³ = Me; R¹ = R² = Me, R³ = H; R¹ = Me, R² = R³ = H) in the presence of BF₃·OEt₂ to give almost entirely MeOCHRCR¹R²CR³:CH₂. In the presence of TiCl₄, however, the product is almost entirely PhSCHRCR¹R²CR³:CH₂. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7HPLC of Formula: 50767-78-7).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.HPLC of Formula: 50767-78-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Grafting of acrylates and vinyl chains onto collagen with ceric initiator was written by Brauer, G. M.;Termini, D. J.. And the article was included in Journal of Applied Polymer Science in 1973.Reference of 3063-94-3 The following contents are mentioned in the article:

Thirty monomers were grafted to steer hide collagen and collagen films using ceric ammonium nitrate [16774-21-3] as initiator. The presence of vinyl polymer was confirmed by ir spectra. High yields of apparent graft polymers were obtained with most acrylate and methacrylate esters e.g. an apparent graft yield of 51% for Et acrylate [140-88-5] and a 89% yield for Me methacrylate [80-62-6]. Yields were not greatly changed by employing the higher ester homologs. Functional group containing monomers e.g. hexafluoroisopropyl methacrylate [3063-94-3] modify the collagen surface or may provide potential reactive ester for further modification. By proper selection of monomers, the collagen surface may be altered to provide the desired surface characteristics. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Reference of 3063-94-3).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Reference of 3063-94-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Identification of volatile compounds in glue ball of fermented waxy corn using headspace solid-phase microextraction gas chromatograph-mass spectrometry (HS-SPME-GC-MS) was written by Wang, Peng;Guo, Li;Cheng, Jianjun;Zhang, Min. And the article was included in Shipin Keji in 2011.Reference of 5444-75-7 The following contents are mentioned in the article:

The waxy corn of glue ball were fermented by lactobacillus, and the volatile flavor components in two kids of glue corn absorbed with headspace solid-phase microextraction were analyzed by gas chromatograph-mass spectrometry GC/MS. The 60 compounds in corn glue ball A and 56 compounds in glue ball B were identified as volatile flavors, included organic acids, esters, aldehydes, ketones, alcs., phenols, ethers, hydrocarbon and heterocyclics, total 60 components with 11 varieties. The characteristic volatile flavors in waxy corn of glue ball were 1,3-dihydro-1-methyl-2H-Benzimidazol-2-one, butanoic acid, lauric acid, propanol, mesitaldehyde, nonanal, 1-methoxy-4- (1-propenyl)-benzene, hexyl hexanoate, Me tetradecanoate, hexadecanoic acid Me ester. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Reference of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Reference of 5444-75-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A highly stereospecific procedure for the transformation of allylic alcohols into 1,3-dienes was written by Yasuda, Arata;Tanaka, Shin;Yamamoto, Hisashi;Nozaki, Hitosi. And the article was included in Bulletin of the Chemical Society of Japan in 1979.Electric Literature of C14H24O2 The following contents are mentioned in the article:

The title synthesis involves (1) epoxidation of allylic alcs. by Me₃COOH in the presence of a V catalyst followed by trimethylsilylation, (2) specific oxirane ring opening by means of diethylaluminum 2,2,6,6-tetramethylpiperidide and subsequent desilylation producing 3-ene-1,2-diols, and (3) removal of both hydroxyl groups through bromination with a mixture of PBr₃ and CuBr followed by Zn debromination. The sequence of reactions was extended successfully to the preparations of β-myrcene from nerol, trans-β-ocimene from geraniol in a specific way, and α- and β-farnesenes from their biol. precursors. A C₁₂ sex pheromone of red bollworm moth was prepared efficiently by this method from cyclododecene. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Electric Literature of C14H24O2).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Electric Literature of C14H24O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics