Month: November 2022

Czerney, Peter published the artcileHeterocyclic substituted coumarins from ¦Â-chloropropeniminium salts, Computed Properties of 6972-05-0, the publication is Journal fuer Praktische Chemie (Leipzig) (1982), 324(2), 255-66, database is CAplus.

The chloropropeniminium salts I (X = N⁺Me₂ ClO₄^–; R = H, 6-Br, 7-OH, 7-OMe, 7-NMe₂, 7-pyrrolidino, 8-OMe, 7-NEt₂, R¹ = H; RR¹ = 5,6-CH:CHCH:CH, 7,8-CH:CHCH:CH) and the aldehydes I (X = O) were prepared by treating 3-acetylcoumarins with DMF-POCl₃ in the presence of HClO₄ or H₂O, resp. I are versatile synthetic intermediates giving I (X = CR²CN, R² = cyano, CO₂Et, 2-benzimidazolyl, 4-O₂NC₆H₄) which were converted to the aminobutadienes. I were also cyclized to pyrylium, thiopyrylium, pyrazolyl, and thiazinyl derivatives

Journal fuer Praktische Chemie (Leipzig) 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 C3H8N2S, Computed Properties of 6972-05-0.

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

Levene, P. A. published the artcileMaximum rotations of carboxylic acids containing a phenethyl group, COA of Formula: C11H14O2, the publication is Journal of Biological Chemistry (1935), 725-33, database is CAplus.

Ph(CH₂)₂CHMeEt (I) can be prepared from active AmOH without racemization and, on the basis of the maximum rotation of I, the maximum rotations of other members of the phenethyl series can be calculated Using this data as a basis, substances of the type Me(PhCH₂CH₂)CH(CH₂)_nCO₂H, where n = 0 or an integer, were prepared Periodic fluctuations of the rotatory values as n increased were noted, thus parallelling the observations with the analogous Ph series and with carboxylic acids of the normal series. Ph(CH₂)₂CHMeCO₂H, [M]_D²⁰ -51.20¡ã, was prepared by the CH₂(CO₂Et)₂ (II) method and resolved by the cinchonidine salt from Me₂CO. Ph(CH₂)₂CHMe(CH₂)₂OH and anhydrous HI followed by reduction with Raney’s catalyst in alk. MeOH gave I, b₃ 66-7¡ã, b₁₃ 96¡ã, d₄²⁵ 0.8563, n_D²⁵ 1.4860, [M]_D²⁵ -17.72¡ã. I was also prepared from BzH and active AmMgBr via the intermediate PhCH(OH)CH₂CHMeEt, b₁ 90¡ã, d₄²⁵ 0.9628, n_D²⁵ 1.5097, [M]_D²⁵ -5.09¡ã, which with anhydrous HI overnight at -70¡ã and 48 hrs. at room temperature gave I, [M]_D²⁵ -35.1¡ã. The values for [M] of the following compounds are based on the parent AcOH, and values based on the parent hydrocarbon are found by using the factor 1.981 obtained from the above. Ph(CH₂)₂CHMe(CH₂)₂MgBr and CO₂ gave Ph(CH₂)₂CHMe(CH₂)₂CO₂H (III), b₁ 152-4¡ã. III was also prepared from Ph(CH₂)₂CHMeCH₂CH₂Br and II via the intermediate Ph(CH₂)₂CHMeCH₂CH(CO₂H)₂, m. 96-8¡ã, which on heating at 180¡ã gave III, b₁ 162¡ã, d₄^21.5 1.018, n_D²⁵ 1.5066, [M]_D^21.5 -3.29¡ã, Et ester (IV), b₂ 122¡ã, d₄²⁵ 0.965, n_D²⁵ 1.4872, [M]_D²⁵ -17.20¡ã. IV with Na and EtOH gave Ph(CH₂)₂CHMe(CH₂)₃OH, b₁₀ 155¡ã, d₄²⁵ 0.9477, n_D²⁵ 1.5080, [M]_D²⁵ -10.13¡ã. Similarly Ph(CH₂)₂CHMe(CH₂)₃CO₂H (V), b_2.5 172¡ã, d₄²⁵ 1.0014, n_D²⁵ 1.5039, [M]_D²⁵ -7.20¡ã, was prepared III reduced with PtO₂ in AcOH gave C₆H₁₁(CH₂)₂CHMe(CH₂)₂CO₂H, b₁₀ 180¡ã, d₄²³ 0.9528, n_D²⁵ 1.4657, [M]_D²³ -2.51¡ã and V gave C₆H₁₁(CH₂)₂CHMe(CH₂)₃CO₂H, b_0.3 136-40¡ã, d₄²⁵ 0.9455, n_D²⁵ 1.4685, [M]_D²⁵ -3.18¡ã. All values for [M] are maximum and for the homogeneous substance.

Journal of Biological Chemistry 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 C11H14O2, COA of Formula: C11H14O2.

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

Ackerman, P. K. published the artcileEvaluation of flotation collectors for copper sulfides and pyrite. II. Non-sulfhydryl collectors, Application In Synthesis of 2016-56-0, the publication is International Journal of Mineral Processing (1987), 21(1-2), 129-40, database is CAplus.

Flotation of chalcopyrite and chalcocite with colloidal electrolyte collectors (Na laurate, Na oleate, Na dodecyl sulfate, and dodecylamine acetate) and chelate-forming compound (glyoxalidine) at pH 5-10.5 is a more complicated process than was previously supposed. Glyoxalidine is superior to the other collectors and at a lower concentration

International Journal of Mineral Processing 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, Application In Synthesis of 2016-56-0.

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

Pohl, Siegfried published the artcileSyntheses and structures of transition metal thiolate complexes containing the new bis(tetramethylguanidine) ligand btmgp, Related Products of catalysis-chemistry, the publication is Inorganica Chimica Acta (2000), 311(1-2), 106-112, database is CAplus.

The syntheses, spectroscopic and structural characterizations of the 1st Fe and Cu thiolate guanidine complexes are described. Reactions of the neutral complexes [CuI(btmgp)] and [FeI₂(btmgp)] [btmgp = 1,3-bis(N,N,N’,N’-tetramethylguanidino)propane] with different uni- and bi-dentate thiolate ions yield the three-coordinate complex [Cu(S-2,4,6-^tBu₃C₆H₂)(btmgp)] (1) and the four-coordinate complexes [Fe(S-2,4,6-ⁱPr₃C₆H₂)₂(btmgp)] (2) and [Fe(SiMe₂(C₆H₄S)₂)(btmgp)] (3) resp. Starting with [Fe(N(SiMe₃)₂)₂], btmgp and the dithiol SiMe₂(C₆H₄SH)₂, an alternative procedure for the preparation of 3 is reported, demonstrating a useful synthetic approach towards neutral, N/S mixed coordinated Fe(II) complexes. The x-ray structure analyses of 1–3 reveal trigonal planar (2N/1S) (1) and tetrahedral (2N/2S) (2, 3) coordination environments around the metal centers.

Inorganica Chimica Acta 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, Related Products of catalysis-chemistry.

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

Dai, Yumin published the artcileIsolation of antiplasmodial anthraquinones from Kniphofia ensifolia, and synthesis and structure-activity relationships of related compounds, Recommanded Product: (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is Bioorganic & Medicinal Chemistry (2014), 22(1), 269-276, database is CAplus and MEDLINE.

Bioassay-guided separation of the South African plant Kniphofia ensifolia for antiplasmodial activity led to the isolation of two new anthraquinones, named kniphofiones A and B, I [R = COC₆H₄OH-4, (E)-COCH:CHC₆H₄OH-4, resp.], together with three known bioactive anthraquinone monomers, and four known bisanthraquinones. The structures of the two new compounds were elucidated based on analyses of their 1D and 2D NMR spectra and mass spectrometric data. The dimeric compounds II (R¹ = H, OH) displayed the strongest antiplasmodial activity among all the isolated compounds, with IC₅₀ values of 0.4 ¡À 0.1 and 0.2 ¡À 0.1 ¦ÌM, resp. The two new compounds displayed modest activities, with IC₅₀ values of 26 ¡À 4 and 9 ¡À 1 ¦ÌM, resp. Due to the synthetic accessibility of the new compounds and the increased activity shown by the dimeric compounds, a structure-activity relationship study was conducted. As a result, one analog of kniphofione B, the caffeic acid derivative of aloe-emodin, I [R = (E)-COCH:CHC₆H₃(OMe)₂-3,4], was found to have the highest activity among all the aloe-emodin derivatives, with an IC₅₀ value of 1.3 ¡À 0.2 ¦ÌM.

Bioorganic & Medicinal Chemistry published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Recommanded Product: (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.

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

Sawatzky, Ryan S. published the artcileA Comparative Ancillary Ligand Survey in Palladium-Catalyzed C-O Cross-Coupling of Primary and Secondary Aliphatic Alcohols, HPLC of Formula: 1237588-12-3, the publication is European Journal of Organic Chemistry (2016), 2016(14), 2444-2449, database is CAplus.

The utility of RockPhos, Ad-BippyPhos, JosiPhos (CyPF-tBu), and Mor-DalPhos in palladium-catalyzed C-O cross-coupling reactions involving aliphatic alcs. and (hetero)aryl halides under analogous conditions was examined, both at room temperature and at elevated temperature (90 ¡ãC). In general, the RockPhos-based catalyst system proved superior, especially at room temperature, but catalysts based on the other ligands examined also proved effective across a range of C-O cross-couplings, in some cases providing better catalytic performance than RockPhos. New reactivity was established in terms of the scope of room temperature reactions. Proof-of-principle examples of such cross-couplings involving aryl mesylates were also demonstrated.

European Journal of Organic Chemistry published new progress about 1237588-12-3. 1237588-12-3 belongs to catalysis-chemistry, auxiliary class Mono-phosphine Ligands, name is 4-(2-(Di(adamantan-1-yl)phosphino)phenyl)morpholine, and the molecular formula is C30H42NOP, HPLC of Formula: 1237588-12-3.

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

Cernak, Juraj published the artcileField induced slow magnetic relaxation in a zig-zag chain-like Dy(III) complex with the ligand o-phenylenedioxydiacetato, SDS of cas: 5411-14-3, the publication is New Journal of Chemistry (2020), 44(31), 13458-13465, database is CAplus.

The new complex [Dy(PDOA)(NO₃)(H₂O)₂]_n¡¤nH₂O (1) (H₂PDOA is o-phenylenedioxydiacetic acid) was isolated from the reaction of dysprosium(III) nitrate and H₂PDOA in a 1:1 molar ratio. Its crystal structure is formed of neutral zigzag chains in which the nonacoordinated Dy(III) atoms (O₉ donor set) are linked by PDOA ligands with a chelating-bridging coordination mode. DC and AC magnetic studies revealed that 1 behaves as a field-induced SMM with three relaxation channels. The derived values, considering the Orbach relaxation process, of the barrier to spin reversal and the extrapolated relaxation time are U/k_B = 59.5 K and ¦Ó₀ = 6.3 ¡Á 10^-10 s, resp. Ab initio calculations support the exptl. results.

New Journal of Chemistry published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, SDS of cas: 5411-14-3.

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

Cernak, Juraj published the artcileSyntheses, crystal structure and magnetocaloric effect of [Gd(PDOA)(NO₃)(H₂O)₂]_n, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Journal of Molecular Structure (2017), 179-185, database is CAplus.

The coordination polymer [Gd(PDOA)(NO₃)(H₂O)₂]_n (1) (PDOA = o-phenylenedioxydiacetato) has been prepared and spectroscopically and structurally characterized. Its crystal structure is formed of a ribbon-like arrangement of Gd(III) atoms linked by bridging carboxylate groups and placed at the cusps of fused triangles with Gd¡¤¡¤¡¤Gd distances of ?6.1 ?. The Gd(III) central atoms exhibit decacoordination by oxygen atoms from hexadentate PDOA ligands with chelating and bridging functions, a chelating nitrato ligand and two aqua ligands. Intra- and intermol. hydrogen bonds of the O-H¡¤¡¤¡¤O and C-H¡¤¡¤¡¤O types contribute to the stability of the structure. The temperature dependence of the magnetic susceptibility revealed weak magnetic interactions among Gd(III) ions which may be attributed to dipolar coupling. Investigation of the magnetocaloric effect gives an estimate of the maximum value of isothermal change of magnetic entropy -¦¤S_m ¡Ö 35 J kg^-1 K^-1 which suggests that 1 can be a good material for magnetic cooling at low temperatures

Journal of Molecular Structure published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Trebichalsky, Pavol published the artcileReduction of herbicide and water stress in spring barley by regulators of polyamine biosynthesis, Product Details of C3H12Cl2N2, the publication is Journal of Microbiology, Biotechnology and Food Sciences (2014), 3(Special2), 171-173, 3 pp., database is CAplus.

The experiment was carried out under artificial light of fluorescent lamps starting with 60% full water capacity which was afterwards decreased on 40% and finally the plants of barley were not watered. 30 plants of this cereal after plant emergence were thinned on 22 pieces. Experiment was treated by triazine herbicide, as well as its mixtures of regulators of polyamine synthesis: ¦Ã-aminobutyric acid, 1.3-propylenediamine dihydrochloride and salicyl acid. Solo application of triazine herbicide during water stress had neg. balance on formation of root and above ground biomass. Addition of regulators of polyamine synthesis had pos. effects on mentioned parameters, but not in comparison to control variant. These stress factors were eliminated most significantly only the application of GABA (100 g.ha-1) in mixture with herbicide.

Journal of Microbiology, Biotechnology and Food Sciences published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C12H6NNaO4, Product Details of C3H12Cl2N2.

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