Month: November 2022

Wang, Shanyu published the artcileChanges in lipid profiles and volatile compounds of shrimp (Penaeus vannamei) submitted to different cooking methods, Synthetic Route of 6217-54-5, the publication is International Journal of Food Science and Technology (2022), 57(7), 4234-4244, database is CAplus.

Herein, the effect of three common cooking methods (boiling, baking and microwaving) on lipids and volatile compounds in shrimp (Penaeus vannamei) was assessed. The results revealed that contents of phospholipid, triglyceride, cholesterol and free fatty acids in the cooked shrimp significantly declined when compared to the raw shrimp. And these decreases occurred especially in the boiling and microwaving treatment. Among free fatty acids, the contents of palmitic acid (C16:0), oleic acid (C18:1n9c) and linoleic acid (C18:2n6c) also decreased greatly in the boiled and microwaved shrimp, while EPA and DHA enhanced in each cooked group (P < 0.05). Furthermore, microwaved samples exhibited higher levels of oxidation parameters, such as acid value (AV) and thiobarbituric acid-reactive substances (TBARS). For volatile compounds, a total of 31 volatile compounds were detected by GC-IMS, and these contents increased after cooking. Aliphatic volatile compounds, including 1-octen-3-one, pentane-1-ol, 1-propanol, octanal, heptanal, pentanal and hexanal, were main flavor contributors in cooked shrimp, with higher contents observed in microwaved shrimp. In addition, the correlation anal. showed that linoleic acid was a substrate for 15 volatile compounds of cooked shrimp meat. These results indicate that microwave cooking exerts more influences on lipid profiles in shrimp and consequently caused more volatile compounds

International Journal of Food Science and Technology published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C6H8O6, Synthetic Route of 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wen, Yixian published the artcileExposure to two-dimensional ultrathin Ti3C2 (MXene) nanosheets during early pregnancy impairs neurodevelopment of offspring in mice, Quality Control of 6217-54-5, the publication is Journal of Nanobiotechnology (2022), 20(1), 108, database is CAplus and MEDLINE.

Two-dimensional ultrathin Ti3C2 (MXene) nanosheets have been extensively explored for various biomedical applications. However, safety issues and the effects of Ti3C2 on human health remain poorly understood. To explore the influence on fetal or offspring after exposure to Ti3C2 nanosheets, we established a mouse model exposed to different doses of Ti3C2 nanosheets during early pregnancy in this study. We found that Ti3C2 nanosheets had negligible effect on the reproductive ability of maternal mice, including average pregnancy days, number of new-borns, and neonatal weight, etc. Unexpectedly, abnormal neurobehavior and pathol. changes in the cerebral hippocampus and cortex in adult offspring were observed following Ti3C2 nanosheet treatment. In further studies, it was found that Ti3C2 exposure led to developmental and functional defects in the placenta, including reduced area of labyrinth, disordered secretion of placental hormones, and metabolic function derailment. The long-chain unsaturated fatty acids were significantly higher in the placenta after Ti3C2 exposure, especially docosahexaenoic acid (DHA) and linoleic acid. The metabolic pathway anal. showed that biosynthesis of unsaturated fatty acids was upregulated while linoleic acid metabolism was downregulated. These developmental and functional defects, particularly metabolic function derailment in placenta may be the cause for the neuropathol. in the offspring. This is the first report about the effects of Ti3C2 nanosheet exposure on pregnancy and offspring. The data provides a better understanding of Ti3C2 nanosheets safety. It is suggested that future studies should pay more attention to the long-term effects of nanomaterials exposure, including the health of offspring in adulthood, rather than only focus on short-term effects, such as pregnancy outcomes. Metabolomics could provide clues for finding the prevention targets of the biol. neg. effect of Ti3C2 nanosheets.

Journal of Nanobiotechnology published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C21H37BO, Quality Control of 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xu, Weiqiang published the artcileThe crystal structures of ten supramolecular salts of benzylamine and organic acids, Safety of 2,2′-Dithiodibenzoic acid, the publication is Journal of Molecular Structure (2020), 128554, database is CAplus.

This article studies the benzylamine based supramol. adducts in ten crystalline solids, where the acids have been integrated. Addition of the benzylamine to the solution of organic acid makes the corresponding supramol. assemblies. All the compounds crystallize as their organic salts with the acidic H moved to the NH₂ of the benzylamine and they have been featured via IR, mp, EA and XRD in detail. The key driving force is attributed to the classical H-bonds from benzylamine and the acids. The other extensive non-covalent interactions also play great functions in space association with the mol. counter partners in relevant crystals. The homo, hetero supramol. synthons or both were built at these salts, and the characteristic R²₄(8), R³₄(10) and R⁴₄(12) graph sets have been frequently established in the salts due to the H-bonds and non-covalent associations For the synergistic effects of the classical H-bonds and the various non-covalent bonds, these salts adopted 1D/2D/3D arrangements.

Journal of Molecular Structure published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C5H8N2O, Safety of 2,2′-Dithiodibenzoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Dilworth, Jonathan R. published the artcileSyntheses and structures of [Re(SC₆H₃Me₂-2,6)₃(PPh₃)], [Re(SC₆H₃Me₂-2,6)₃(Bu^tNC)₂], [Re(SC₆H₂Prⁱ₃-2,4,6)₃L(PPh₃)] (L = N₂ or CO) and [ReH₄(PPh₃)₄][ReO(SC₆H₂Prⁱ₃-2,4,6)₄], Quality Control of 22693-41-0, the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1995), 3153-64, database is CAplus.

The hydride [ReH₇(PPh₃)₂] reacted with 2,6-dimethylbenzenethiol in toluene to give [Re(SC₆H₃Me₂-2,6)₃(PPh₃)] (1). A crystal structure showed a trigonal-bipyramidal geometry about the Re with an agostic interaction to a thiolate Me occupying an apical site, trans to the PPh₃ ligand. 1 Reacts rapidly with MeCN to give the known [Re(SC₆H₃Me₂-2,6)₃(MeCN)(PPh₃)] (2) and with Bu^tNC to form [Re(SC₆H₃Me₂-2,6)₃(Bu^tNC)₂] (3). The crystal structure of 3 showed trigonal-pyramidal geometry about the Re with asym. coordination of the isocyanide ligands and an unusual configuration for the thiolate aromatic groups. The reactions of the hydrides [ReH₇(PPh₃)₂] and [ReH₅(PPh₃)₃] with 2,4,6-triisopropyl-, 2,6-dimethoxybenzenethiol and tris(2-sulfanylphenyl)phosphine were also studied. With HSC₆H₂Prⁱ₃-2,4,6, [Re(SC₆H₂Prⁱ₃-2,4,6)₃(N₂)(PPh₃)] (4) was formed and its structure determined The preparations and structures of [ReH₄(PPh₃)₄][ReO(SC₆H₂Prⁱ₃-2,4,6)₄], [Re{SC₆H₃(OMe)₂-2,6}₃(PPh₃)] and [Re{P(C₆H₄S-2)₃}(PPh₃)] are also discussed. An alternative convenient route to [ReH₄(PPh₃)₄]⁺ from [ReH₅(PPh₃)₃] is presented.

Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Quality Control of 22693-41-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xiao, He-Xin published the artcileBulky Di(1-adamantyl)phosphinous Acid-Ligated Pd(II) Precatalysts for Suzuki Reactions of Unreactive Aryl Chlorides, Name: 4,4′-Dimethyldiphenyl, the publication is ACS Omega (2021), 6(50), 35134-35143, database is CAplus and MEDLINE.

Di(1-adamantyl)phosphine oxide (SPO-Ad: Ad₂P(V)(=O)H), a stable tautomer of di(1-adamantyl)phosphinous acid (PA-Ad: Ad₂P(III)-OH), was employed to synthesize two new PA-Ad-coordinated complexes, POPd-Ad and POPd2-Ad. POPd-Ad was easily transformed from POPd2-Ad in MeCN, and the [M – H]^– ion of the deprotonated POPd-Ad was observed in the electrospray ionization-mass spectrum of POPd2-Ad. Both complexes are effective precatalysts for the Suzuki reaction of aryl chlorides. The reduction of Pd(II) in POPd-Ad and POPd2-Ad by arylboronic acid was examined, and the ideal Pd-to-PA ratio in the Suzuki reaction is 1:1. The effect of temperature on the catalytic yields was studied to examine the possible ligation state of the active species and the dimer-to-monomer process of POPd2-Ad. Mononuclear and mono-ligated Pd species was assumed to be catalytically active. The electronic and steric effects of PA-Ad were slightly better than those reported for PA-tBu (^tBu₂P(III)-OH). D. functional theory calculations were performed to evaluate the formation of mono-ligated and mononuclear Pd species from POPd-Ad and POPd2-Ad. Also, the reaction time and catalyst loading could be reduced for the reported POPd1-tBu precatalyst using the optimized reaction conditions for POPd-Ad. The complexes synthesized in this extensive study will complement the existing SPO-coordinated POPd series of precatalysts.

ACS Omega published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C9H12O, Name: 4,4′-Dimethyldiphenyl.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Chao, Chen-Shen published the artcileStudies on fabric dye additives – dye additives for polyacrylic fibers, COA of Formula: C14H31NO2, the publication is Yingyong Jiemian Huaxue (1979), 2-8, database is CAplus.

In the dyeing of polyacrylonitrile fibers with Astrazon Yellow 3 GL, Astrazon Red GTL, and Astrazon Blue FRR in the presence of 21 cationic surfactants, 15 anionic surfactants, and 26 nonionic surfactants, alkylbenzyldimethylammonium chlorides, alkyltrimethylammonium chlorides, and alkylhydroxyimidazolines gave good results. Dyeing was improved by mixing the above cationic surfactants with C₁₆H₃₃(OCH₂CH₂)_nOH [9004-95-9], C₁₇H₃₅CO(OCH₂CH₂)_nOH [9004-99-3], or similar nonionic surfactants.

Yingyong Jiemian Huaxue published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, COA of Formula: C14H31NO2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

London, Clare published the artcileImidazopyridines: a novel class of hNa_v1.7 channel blockers, Related Products of catalysis-chemistry, the publication is Bioorganic & Medicinal Chemistry Letters (2008), 18(5), 1696-1701, database is CAplus and MEDLINE.

A series of imidazopyridines were evaluated as potential sodium channel blockers for the treatment of neuropathic pain. Several members were identified with good hNa_v1.7 potency and excellent rat pharmacokinetic profiles. Compound I had good efficacy (52% and 41% reversal of allodynia at 2 and 4 h post-dose, resp.) in the Chung rat spinal nerve ligation (SNL) model of neuropathic pain when dosed orally at 10 mg/kg.

Bioorganic & Medicinal Chemistry Letters published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C3H6F3N, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Boethling, Robert S. published the artcileDoes the semi-continuous activated sludge (SCAS) test predict removal in secondary treatment?, Recommanded Product: Dodecylamineacetate, the publication is Chemosphere (1997), 35(10), 2119-2130, database is CAplus.

The SCAS test was formalized by the US Soap and Detergent Association in 1965. The SCAS procedure has also been adopted by the Organization for Economic Cooperation and Development as a test for inherent biodegradability and by the US EPA as a test guideline (40CFR 835.3120) under the Toxic Substances Control Act. To study whether the SCAS test may be used to predict removal in full-scale activated sludge treatment systems, we collected all available SCAS data for organic chems., and retrieved data from full-, pilot- or bench-scale continuous-feed activated sludge studies for the chems. that had SCAS data. The intersected file was subjected to statistical anal. Conclusions are: (1) SCAS data were strongly clustered at high (>90%) removal; (2) for SCAS removal >90%, it is probable that removal in the field will be >50%; (3) however, for SCAS removal <90% adequate treatability cannot be predicted with confidence.

Chemosphere published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Recommanded Product: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lee, Kang-sang published the artcileMonodentate Non-C₂-symmetric Chiral N-Heterocyclic Carbene Complexes for Enantioselective Synthesis. Cu-Catalyzed Conjugate Additions of Aryl- and Alkenylsilylfluorides to Cyclic Enones, Recommanded Product: Difluorodiphenylsilane, the publication is Journal of Organic Chemistry (2009), 74(12), 4455-4462, database is CAplus and MEDLINE.

A new class of enantioselective conjugate addition (ECA) reactions that involve aryl- or alkenylsilyl fluoride reagents and are catalyzed by chiral non-C₂-sym. Cu-based N-heterocyclic carbene (NHC) complexes are disclosed. Transformations were designed based on the principle that a catalytically active chiral NHC-Cu-aryl or NHC-Cu-alkenyl complex can be accessed from reaction of a Cu-halide precursor with in situ-generated aryl- or alkenyltetrafluorosilicate. Reactions proceed in the presence of 1.5 equiv of the aryl- or alkenylsilane reagents and 1.5 equiv of tris(dimethylamino)sulfonium difluorotrimethylsilicate (TASF). Desired products are isolated in 63-97% yield and 73.5:26.5-98.5:1.5 enantiomeric ratio (47%-97% ee). A major focus of the present studies is the design, evaluation, and development of new chiral imidazolinium salts and their derived NHC-Cu complexes as catalysts that promote reactions of various carbosilanes to a range of electrophilic substrates. Toward this end, nearly 20 new chiral monodentate imidazolinium salts, most of which are non-C₂-sym., were prepared and fully characterized and their ability to serve as catalysts in the ECA reactions was studied.

Journal of Organic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Recommanded Product: Difluorodiphenylsilane.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Tu, Yongqiang published the artcileSynthesis of 9-iminedibenzocycloiodonium salts, HPLC of Formula: 1821-27-8, the publication is Lanzhou Daxue Xuebao, Ziran Kexueban (1990), 26(1), 30-4, database is CAplus.

Cyclic iodonium compounds I (R, R¹ = NO₂, NHAc, Br, Cl, iodo; X = Cl, iodo) were prepared starting from 4,4′-dinitrodiphenylamine (II). E.g., iodination of II with I₂/SbCl₅ gave 75% 2,2′-diiodo-4,4′-dinitrodiphenylamine, cyclization of which with K₂S₂O₈/H₂SO₄ gave, after treatment with NaCl/HCO₂H, 45% I (R = R¹ = NO₂, X = Cl).

Lanzhou Daxue Xuebao, Ziran Kexueban published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C9H7NO4, HPLC of Formula: 1821-27-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia