Month: December 2022

Watanabe, Shoji published the artcileReaction of carboxylic acids with conjugated olefins, using sodium naphthalenide in the presence of N,N,N’,N’-tetramethylethylenediamine, Formula: C11H14O2, the publication is Yukagaku (1982), 31(5), 295-9, database is CAplus.

Alkylation of carboxylic acids at the 2-position with conjugated dienes such as isoprene, butadiene, myrcene, and styrene were carried out. For example, 2,2,5-trimethyl-4-hexenoic acid was obtained in 66% yield from the reaction of isobutyric acid (I) and isoprene using Na naphthalenide in the presence of Me₂NCH₂CH₂NMe₂. Similarly, from I and styrene, 2,2-dimethyl-4-phenylbutyric acid was obtained in 57% yield. Furthermore, conversion of these carboxylic acids to alcs., aldehydes, and lactones were examined

Yukagaku published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C3H5BN2O2, Formula: C11H14O2.

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

Mamiya, Mitsuo published the artcileSelective flotation of lithium tantalate from green carborundum. Recycling of slicing dusts of advanced functional materials, Name: Dodecylamineacetate, the publication is Nippon Kogyo Kaishi (1988), 104(1207), 581-6, database is CAplus.

The flotation separation of LiTaO₃ (I) from green carborundum (A) slicing dust was investigated. Only with surfactant were both I and A floated at any pH. Floatability of I was enhanced by HF with use of dodecylamine acetate at pH 2, whereas that of A was depressed by gum arabic. Application of this method to slicing dust containing 9.9% I gave 91.2% recovery of I with 70.8% purity in the froth.

Nippon Kogyo Kaishi 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, Name: Dodecylamineacetate.

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

Shimizu, Norikazu published the artcileAge-related copper, zinc, and iron metabolism in Long-Evans cinnamon rats and copper-eliminating effects of D-penicillamine and trienthine-2HCl, Name: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Journal of Trace Elements in Experimental Medicine (1997), 10(2), 49-59, database is CAplus.

The Long-Evans cinnamon (LEC) rat is an animal model of human Wilson’s disease. The hepatic copper content of LEC rats increased in an age-dependent manner from 4-5 days of age and was maintained at a high level from 15-16 wk of age. The renal copper content of LEC rats showed a tendency to increase from 10 wk of age and increased rapidly from 15 wk of age. No difference in whole-brain copper concentration was observed between LEC and Long-Evans agouti (LEA) rats. LEC rats treated with D-penicillamine and trienthine-2HCl had reduced liver dysfunction. These agents reduced the hepatic copper content by ?1/2-2/3 and the renal copper content to within the normal range. They also decreased the copper content of hair and nails, and there was also a good correlation between the copper content of liver and white hair.

Journal of Trace Elements in Experimental Medicine published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C10H14BNO3, Name: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

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

Calo, Fabio P. published the artcileA Heteroleptic Dirhodium Catalyst for Asymmetric Cyclopropanation with ¦Á-Stannyl ¦Á-Diazoacetate. “Stereoretentive” Stille Coupling with Formation of Chiral Quarternary Carbon Centers, COA of Formula: C9H21NO3, the publication is Angewandte Chemie, International Edition (2020), 59(33), 13900-13907, database is CAplus and MEDLINE.

The heteroleptic dirhodium paddlewheel catalyst 7 with a chiral carboxylate/acetamidate ligand sphere is uniquely effective in asym. [2+1] cycloadditions with ¦Á-diazo-¦Á-trimethylstannyl (silyl, germyl) acetate. Originally discovered as a trace impurity in a sample of the homoleptic parent complex [Rh₂((R)-TPCP)₄] (5), the protic acetamidate ligand is quintessential for rendering 7 highly enantioselective. The -NH group is thought to lock the ensuing metal carbene in place via interligand H bonding. The resulting stannylated cyclopropanes undergo stereoretentive cross coupling, which shows that even chiral quaternary C centers can be made by the Stille-Migita reaction.

Angewandte Chemie, International Edition published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, COA of Formula: C9H21NO3.

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

Huang, Picheng published the artcileThe effect of hydrophobicity of silicate minerals on the adsorption of dodecylammonium acetate, Computed Properties of 2016-56-0, the publication is Materials Research Society Symposium Proceedings (1997), 351-356, database is CAplus.

The interaction between hydrophobic species plays an important role in the adsorption of surfactants. In this paper, naturally hydrophilic quartz and naturally hydrophobic talc were selected as model minerals for studying the adsorption of the cationic surfactant, dodecylammonium acetate (DAA). The effect of the hydrophobicity of minerals on the adsorption of DAA was investigated by measuring zeta potentials, adsorption densities and suspension stabilities as a function of pH in the presence of DAA.

Materials Research Society Symposium Proceedings 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, Computed Properties of 2016-56-0.

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

Schweiger, K. published the artcileHeterocycles, 52. Reaction of 3,4,5,6-tetrahydro-6-hydroxy-4,4,6-trimethyl-1,3-thiazine-2-thione with secondary amines, Recommanded Product: 1,1-Dimethylthiourea, the publication is Monatshefte fuer Chemie (1977), 108(1), 243-55, database is CAplus.

The title compound reacted with secondary amines via the dialkylammonium-3-oxoalkyldithiocarbamate, either via isothiocyanates to 4-dialkylaminodihydro-2(1H)-pyridinethiones I (NRR1 = Et2N, piperidino, morpholino, 4-methyl-1-piperazinyl, etc.) or to dialkylammonium dithiocarbamates, depending on the amine used and the reaction conditions. Subsequently, 6-dialkylaminotetrahydro-1,3-thiazine-2-thiones II (NRR1 = morpholino, 4-methyl-1-piperazinyl) or tetrahydro-6-mercapto-1,3-thiazine-2-thione were formed. On being heated to reflux, II gave I and 4-dialkylaminodihydrothiopyranthione III. With secondary amines only dithiocarbamates were formed from tetrahydro-6-hydroxy-3,4,4,6-tetramethyl-1,3-thiazine-2-thione. The reaction of 5,6-dihydro-4,4,6-trimethyl-1,3-thiazine-2-thione with secondary amines gave N,N-dialkylthioureas or dialkylammonium thiocyanates; with dialkylformamides, 4-dialkylaminodihydropyridinethiones I were formed. 5,6-Dihyro-3,4,4,6-tetramethyl-1,3-thiazine-2-thione did not react with secondary amines or with dialkylformamides.

Monatshefte fuer Chemie published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C12H13NO3, Recommanded Product: 1,1-Dimethylthiourea.

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

Chiarotti, M. published the artcileThin-layer and high-performance liquid chromatographic analyses of organic gunshot residues, Quality Control of 1821-27-8, the publication is Nippon Hoigaku Zasshi (1987), 41(2), 65-70, database is CAplus and MEDLINE.

TLC, normal HPLC, and reversed-phase HPLC were investigated for identification of organic unburnt gunshot residues. Reversed-phase HPLC shows high sensitivity (1-6 ng) for diphenylamine and nitroglycerin (UV detection 280 nm), and it is proposed as a promising tool in forensic studies. Exptl. conditions are given in extensive details.

Nippon Hoigaku Zasshi 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 C12H9N3O4, Quality Control of 1821-27-8.

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

Wang, Shuiliang published the artcileFacile synthesis of methylthiomethyl esters through Pummerer-type rearrangement of carboxylic acids and DMSO under metal-free conditions, Safety of (E)-3-(3-Nitrophenyl)acrylic acid, the publication is Synthetic Communications (2019), 49(7), 950-958, database is CAplus.

A green and cost-effective Pummerer-type rearrangement between readily accessible carboxylic acids and DMSO has been achieved under metal-free conditions in satisfactory to excellent yields. The transformation for the synthesis of valuable methylthiomethyl esters is shown to be a convenient strategy for various (hetero)aromatic acids, ¦Á,¦Â-unsaturated carboxylic acids and saturated alkyl carboxylic acids with good functional group tolerance.

Synthetic Communications published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C27H39ClN2, Safety of (E)-3-(3-Nitrophenyl)acrylic acid.

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

Shao, Yitong published the artcileEnhancement of black and odorous water treatment coupled with accelerated lipid production by microalgae exposed to ¹²C⁶⁺ heavy-ion beam irradiation, Application of Docosahexaenoic Acid, the publication is Chemosphere (2022), 135452, database is CAplus and MEDLINE.

In this study, Auxenochlorella protothecoides (AP-CK) was selected due to its reported high growth potential in sterilized black and odorous water (SBOW). In order to improve the resource utilization level of microalgae for wastewater treatment, AP-CK was mutated using ¹²C⁶⁺ heavy-ion beam irradiation, and a high lipid-containing mutant (AP-34#) was isolated and further evaluated to treat original black and odorous water (OBOW). Compared with the wild type, the maximum removal rates of COD, NH+4-N and TP of the mutant increased by 8.12¡À 0.33%, 10.43 ¡À 0.54% and 11.97 ¡À0.16%, resp., while maximum dissolved oxygen content increased from 0 to 4.36 ¡À0.25 mg/L. Besides, the mutant lipid yield increased by 115.87 ¡À 3.22% over the wild type in OBOW. The fatty acid profile of AP-34# grown in SBOW and OBOW showed higher proportion of saturated fatty acids (C16:0 and C18:0) and valuable polyunsaturated fatty acids (mainly C20:5n3 and C22:6n3) which are more suitable for biodiesel production and value-added products, resp. This work provides a new perspective on improving the characteristics of microalgae and an innovative approach for resource-based microalgae wastewater treatment through bioremediation of black and odorous water.

Chemosphere 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 C8H11BO2, Application of Docosahexaenoic Acid.

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

Yang, Ruige published the artcileSemisynthesis and neurotrophic activity studies of novel neomajucin/majucin derivatives as neurotrophin small molecule mimetics, Product Details of C10H10O3, the publication is Bioorganic & Medicinal Chemistry Letters (2022), 128580, database is CAplus and MEDLINE.

Majucin-type Illicium sesquiterpenes with potent neurotrophic activity are considered to be promising candidates for the treatment of various neurodegenerative disease. Owing to the low-abundance metabolites in Illicium genus, there are few studies on their structural modifications, structure-activity relationships, and pharmacophoric motif. Herein, structural modifications were conducted on the hydroxyl groups at C-3 and C-6 positions of two majucin-type compounds neomajucin (1, I) and majucin (2, II), and 39 neomajucin/majucin based esters were synthesized and evaluated for their neurite outgrowth-promoting activities. Many of the target derivatives displayed more potent neurite outgrowth-promoting activity than their precursors. Some interesting structure-activity relationships (SARs) were also observed Moreover, compound 1a (III) showed good neuroprotective effect on MPP⁺-induced PC12 cell damage. Finally, compounds 1a and 3a (IV) exhibited relatively no cytotoxicity to normal human H9C2 cardiac cells. This work will shed light on the development of neomajucin/majucin derivatives as potential neurotrophic agents.

Bioorganic & Medicinal Chemistry Letters published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C8H5F3O2S, Product Details of C10H10O3.

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