Tag: M.W=150-200

Yamada, Tohru published the artcileDirect epoxidation of olefins catalyzed by nickel(II) complexes with molecular oxygen and aldehydes, Application In Synthesis of 5205-11-8, the publication is Bulletin of the Chemical Society of Japan (1991), 64(7), 2109-17, database is CAplus.

In the presence of a bis(1,3-diketonato)nickel(II) complex, various olefins are directly monooxygenated into the corresponding epoxides on treatment with atm. pressure of oxygen or air and aldehydes. Especially, it is noted that bis[1,3-bis(p-methoxyphenyl)-1,3-propanedionato]nickel(II) (I) behaves as an excellent catalyst in the present epoxidation Thus epoxidation of 2-methyl-2-decene in the presence of oxygen, isobutyraldehyde and catalyst I gave the epoxide II quant., at room temperature

Bulletin of the Chemical Society of Japan published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C14H19NO8, Application In Synthesis of 5205-11-8.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Qin, Rui published the artcileSynthesis of LSD1 inhibitor-pyrrole-imidazole polyamide conjugates for region-specific alterations of histone modification, Recommanded Product: 3-(Methoxycarbonyl)benzoic acid, the publication is Heterocycles (2019), 99(2), 891-905, database is CAplus.

Synthetic method of LSD1 inhibitor-pyrrole-imidazole polyamide conjugates for region-specific alterations of histone modification is described. A (1S,2R)-tranylcypromine (PCPA) unit was coupled with an L-lysine part using a nosyl strategy. Conjugation of the inhibitor part with PIP tetramer units was achieved by amide bond formation using PyBOP as a condensation reagent.

Heterocycles published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H8O4, Recommanded Product: 3-(Methoxycarbonyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Imada, Motosuke published the artcileCopolymers incorporated with β-substituted acrylate synthesized by organo-catalyzed group-transfer polymerization, Application of Methyl 3-phenyl-2-propenoate, the publication is Polymer Journal (Tokyo, Japan) (2021), 53(9), 989-999, database is CAplus.

Various copolymers incorporated with β-substituted acrylates, such as alkyl crotonates (e.g., Me crotonate (MC), Et crotonate (EC), iso-Pr crotonate (iPC), and Bu crotonate (nBC)) and Me cinnamate (MCin), were synthesized by group-transfer polymerization (GTP) using a silicon-based Lewis acid catalyst. In addition to β-substituted acrylates, α-substituted acrylates (e.g., Me methacrylate (MMA) and Bu methacrylate (nBMA)) were examined as comonomers. Proton NMR (¹H NMR) spectroscopy and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) characterizations of the obtained copolymers revealed that each monomer component was incorporated sufficiently. The thermal stabilities of the resulting copolymers were investigated by dynamic mech. anal. (DMA), indicating that the glass-transition temperature (T_g) of the copolymers can be widely varied over a relatively high-temperature range by selecting the optimal comonomer. More specifically, the T_g values of poly(MC-random-EC) (MC/EC molar ratio = 50/50), poly(MC-random-nBC) (MC/nBC molar ratio = 50/50), poly(MC-random-MCin) (MC/MCin molar ratio = 54/46), and poly(nBC-random-MCin) (nBC/MCin molar ratio = 56/44) were 173, 130, 216, and 167°C, resp.

Polymer Journal (Tokyo, Japan) published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Application of Methyl 3-phenyl-2-propenoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sharique, Mohammed published the artcileN-Heterocyclic carbene based catalytic platform for Hauser-Kraus annulations, COA of Formula: C7H10O4, the publication is Chemical Science (2020), 11(27), 7239-7243, database is CAplus and MEDLINE.

The venerable Hauser-Kraus annulation is an effective and convergent method for generating oxygenated polycyclic aromatic compounds Despite its application in complex mol. synthesis, the harsh and strongly basic conditions limit its utility in more functionalized mol. settings. The first catalytic Hauser-Kraus annulation was developed based on N-heterocyclic carbene catalysis that proceeded under milder conditions. The scope of the transformation in the presence of several functional groups were demonstrated. A concerted mechanism for the annulation that proceeded through a non-canonical Breslow intermediate was also proposed.

Chemical Science published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C10H10O4, COA of Formula: C7H10O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kashiwabara, Taigo published the artcileDecarbonylative Coupling of Fluorobenzoyl Chlorides with Hexamethyldisilane in the Presence of a Palladium Complex Catalyst: Extremely Facile Decarbonylation of Pentafluorobenzoyl-Pd Complex Relevant to C₆F₅SiMe₃ Formation, Formula: C9H8F2O2, the publication is Organometallics (2006), 25(19), 4648-4652, database is CAplus.

Pd-phosphite complexes (PdCl₂(PhCN)₂ + P(OEt₃)₃ or P(OPr)₃ most effective) catalyze the reaction of pentafluorobenzoyl chloride with hexamethyldisilane to selectively form pentafluorophenyltrimethylsilane as virtually the sole product. The reaction of 3,5-difluoro- or 4-fluorobenzoyl chloride was less selective, giving a mixture of corresponding benzoyl- and phenylsilanes. Oxidative addition of pentafluorobenzoyl chloride with Pd(PPh₃)₄ or with Pd[P(OEt)₃]₂ generated in situ proceeds readily, but decarbonylation occurs, giving trans-C₆F₅PdClL₂ (L = PPh₃, P(OEt)₃), selectively. The crystal and mol. structures of trans-C₆F₅PdCl(PPh₃)₂ were determined by x-ray crystallog.

Organometallics published new progress about 350-19-6. 350-19-6 belongs to esters-buliding-blocks, auxiliary class Fluoride,Benzene,Ester, name is Ethyl 3,5-difluorobenzoate, and the molecular formula is C9H8F2O2, Formula: C9H8F2O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Wang, Jing published the artcileCharacterization of the Volatile Compounds in Camellia oleifera Seed Oil from Different Geographic Origins, SDS of cas: 103-26-4, the publication is Molecules (2022), 27(1), 308, database is CAplus and MEDLINE.

Volatile flavor of edible oils is an important quality index and factor affecting consumer choice. The purpose of this investigation was to characterize virgin Camellia oleifera seed oil (VCO) samples from different locations in southern China in terms of their volatile compounds to show the classification of VCO with respect to geog. Different samples from 20 producing VCO regions were collected in 2020 growing season, at almost the same maturity stage, and processed under the same conditions. Headspace solid-phase microextraction (HS-SPME) with a gas chromatog.-mass spectrometer system (GC-MS) was used to analyze volatile compounds A total of 348 volatiles were characterized, including aldehydes, ketones, alcs., acids, esters, alkenes, alkanes, furans, phenols, and benzene; the relative contents ranged from 7.80-58.68%, 1.73-12.52%, 2.91-37.07%, 2.73-46.50%, 0.99-12.01%, 0.40-14.95%, 0.00-27.23%, 0.00-3.75%, 0.00-7.34%, and 0.00-1.55%, resp. The VCO geog. origins with the largest number of volatile compounds was Xixiangtang of Guangxi (L17), and the least was Beireng of Hainan (L19). A total of 23 common and 98 unique volatile compounds were detected that reflected the basic and characteristic flavor of VCO, resp. After PCA, heatmap and PLS-DA anal., Longchuan of Guangdong (L8), Qingshanhu of Jiangxi (L16), and Panlong of Yunnan (L20) were in one group where the annual average temperatures are relatively low, where annual rainfalls are also low. Guangning of Guangdong (L6), Yunan of Guangdong (L7), Xingning of Guangdong (L9), Tianhe of Guangdong (L10), Xuwen of Guangdong (L11), and Xiuying of Hainan (L18) were in another group where the annual average temperatures are relatively high, and the altitudes are low. Hence, volatile compound distributions confirmed the differences among the VCO samples from these geog. areas, and the provenance difference evaluation can be carried out by flavor.

Molecules published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C23H28N2O4, SDS of cas: 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhi, Chunli published the artcileDetermination and correlation of ternary isobaric vapour-liquid equilibrium data of (dimethyl succinate + dimethyl glutarate + dimethyl adipate) at 2, 5 and 8 kPa, COA of Formula: C8H14O4, the publication is Journal of Chemical Thermodynamics (2020), 106047, database is CAplus.

Isobaric vapor-liquid equilibrium data of {dimethyl succinate (DMS) + di-Me glutarate (DMG) + di-Me adipate (DMA)} ternary system was measured at 2 kPa, 5 kPa and 8 kPa with a dynamic recirculating apparatus and the temperature ranged from 364.46 to 403.55 K. The exptl. data was correlated with NRTL, Wilson and Uniquac models. The results showed that the maximum value of the root mean square deviation of the vapor phase mole fraction of the ternary system correlated by the three models is 0.0083, 0.0076 and 0.0084, resp. The vapor-liquid equilibrium data of the ternary system was predicted by the interaction parameters of NRTL, Wilson and the Uniquac models in the literature. The results showed that the maximum value of the root mean square deviation of the vapor phase mole fraction of the ternary system predicted by the three models is 0.0547, 0.0471, and 0.0498, resp. The deviation between the exptl. value and the regression value or the predicted value was small, and both met the needs of design calculation of the engineering separation The results obtained from the regression of exptl. values are significantly better.

Journal of Chemical Thermodynamics published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H19NO, COA of Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Runemark, August published the artcileAerobic Oxidative EDA Catalysis: Synthesis of Tetrahydroquinolines Using an Organocatalytic EDA Active Acceptor, Name: Ethyl 4-dimethylaminobenzoate, the publication is Journal of Organic Chemistry (2022), 87(2), 1457-1469, database is CAplus and MEDLINE.

A catalytic electron donor-acceptor (EDA) complex for the visible-light-driven annulation reaction between activated alkenes and N,N-substituted dialkyl anilines was reported. The key photoactive complex was formed in situ between dialkylated anilines as donors and 1,2-dibenzoylethylene as a catalytic acceptor. The catalytic acceptor was regenerated by aerobic oxidation Investigations into the mechanism were provided, revealing a rare example of a catalytic acceptor in photoactive EDA complexes that can give access to selective functionalization of aromatic amines under mild photochem. conditions.

Journal of Organic Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Name: Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Isidorov, Valery A. published the artcileRapid GC/MS determination of botanical precursors of Eurasian propolis, Category: esters-buliding-blocks, the publication is Food Chemistry (2014), 101-106, database is CAplus and MEDLINE.

In this work, ether extracts of propolises from 11 countries of Europe and Asia together with extracts of the buds of their principal plant precursors were prepared and investigated by gas chromatog.-mass spectrometry. For the first time, chem. compositions of the exudates of aspen, white birch and silver birch buds were determined Basing on the data on the content of individual components and their groups, the method of rapid examination of plant precursors of propolis was developed. This new method is based on the use of a chromatogram for one extracted ion m/z = 219, characteristic for a group of similar substances: phenylpropenoids. The I^T retention indexes of silylated derivatives of 449 substances registered in the buds of 6 species of trees and 37 samples of propolis extracts were calculated These useful anal. parameters (majority of which are absent in the available databases) are attached in Supplementary information.

Food Chemistry published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Liu, Chengwei published the artcileDecarbonylative sulfide synthesis from carboxylic acids and thioesters via cross-over C-S activation and acyl capture, Synthetic Route of 1877-71-0, the publication is Organic Chemistry Frontiers (2021), 8(17), 4805-4813, database is CAplus and MEDLINE.

A method for the synthesis of sulfides from carboxylic acids via thioester C-S activation and acyl capture has been developed, wherein thioesters serve as dual electrophilic activators of carboxylic acids and S-nucleophiles through the merger of decarbonylative palladium catalysis and sulfur coupling. This new concept employs readily available carboxylic acids as coupling partners to directly intercept sulfur reagents via redox-neutral thioester-enabled cross-over thioetherification. The scope of this platform is demonstrated in the highly selective decarbonylative thioetherification of a variety of carboxylic acids and thioesters, including late-stage derivatization of pharmaceuticals and natural products. This method operates under mild, external base-free, and operationally practical conditions, providing a powerful new framework to unlock aryl electrophiles from carboxylic acids and increase the reactivity by employing common building blocks in organic synthesis.

Organic Chemistry Frontiers published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H8O4, Synthetic Route of 1877-71-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics