Tag: M.W=250-300

Pizzarello, Sandra; Wang, Yi; Chaban, Galina M. published the artcile< A comparative study of the hydroxy acids from the Murchison, GRA 95229 and LAP 02342 meteorites>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is hydroxy acid carbonaceous chondrite aqueous extract GC MS; chirality hydroxy acid carbonaceous chondrite; carbon isotope hydroxy acid carbonaceous chondrite; atomic deuterium hydroxy acid carbonaceous chondrite.

The hydroxy acid suites extracted from the Murchison (MN), GRA 95229 (GRA) and LAP 02342 (LAP) meteorites have been investigated for their mol., chiral and isotopic composition Substantial amounts of the compounds have been detected in all three meteorites, with a total abundance that is lower than that of the amino acids in the same stones. Overall, their mol. distributions mirror closely that of the corresponding amino acids and most evidently so for the LAP meteorite. A surprising L-lactic acid enantiomeric excess was found present in all three stones, which cannot be easily accounted by terrestrial contamination; all other compounds of the three hydroxy acid suites were found racemic. The branched-chain five carbon and the diastereomer six-carbon hydroxy acids were also studied vis-a-vis the corresponding amino acids and calculated ab initio thermodn. data, with the comparison allowing the suggestion that meteoritic hydroxy acid at these chain lengths formed under thermodn. control and, possibly, at a later stage than the corresponding amino acids. 13C and D isotopic enrichments were detected for many of the meteoritic hydroxy acids and found to vary between mol. species with trends that also appear to correlate to those of amino acids; the highest δD value (+3450‰) was displayed by GRA 2-OH-2-methylbutyric acid. The data suggest that, while the amino- and hydroxy acids likely relate to common presolar precursor, their final distribution in meteorites was determined to large extent by the overall composition of the environments that saw their formation, with ammonia being the determining factor in their final abundance ratios.

Geochimica et Cosmochimica Acta published new progress about Amino acids Role: GOC (Geological or Astronomical Occurrence), GPR (Geological or Astronomical Process), OCCU (Occurrence), PROC (Process). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Esteruelas, Miguel A.; Martinez, Antonio; Olivan, Montserrat; Onate, Enrique published the artcile< Direct C-H Borylation of Arenes Catalyzed by Saturated Hydride-Boryl-Iridium-POP Complexes: Kinetic Analysis of the Elemental Steps>, Product Details of C19H34O2, the main research area is carbon hydrogen bond borylation arene catalyst boryliridium hydride; isotope effect borylation arene catalyst boryliridium hydride; reductive elimination kinetics boryl iridium hydride pincer complex; B−H activation; C−H activation; arene borylation; iridium; pincer ligand.

The saturated trihydride IrH3{κ3-P,O,P-[xant(PiPr2)2]} (1; xant(PiPr2)2 = 9,9-dimethyl-4,5-bis(diisopropylphosphino)xanthene) activates the B-H bond of two mols. of pinacolborane (HBpin) to give H2, the hydride-boryl derivatives IrH2(Bpin){κ3-P,O,P-[xant(PiPr2)2]} (2) and IrH(Bpin)2{κ3-P,O,P-[xant(PiPr2)2]} (3) in a sequential manner. Complex 3 activates a C-H bond of two mols. of benzene to form PhBpin and regenerates 2 and 1, also in a sequential manner. Thus, complexes 1, 2, and 3 define two cycles for the catalytic direct C-H borylation of arenes with HBpin, which have dihydride 2 as a common intermediate. C-H bond activation of the arenes is the rate-determining step of both cycles, as the C-H oxidative addition to 3 is faster than to 2. The results from a kinetic study of the reactions of 1 and 2 with HBpin support a cooperative function of the hydride ligands in the B-H bond activation. The addition of the B atom of the borane to a hydride facilitates the coordination of the B-H bond through the formation of κ1- and κ2-dihydrideborate intermediates.

Chemistry – A European Journal published new progress about Aromatic compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Wu, Xiaohong; Li, Zhengang; Song, Cun; Chen, Libin; Dai, Peng; Zhang, Pengfang; Qiao, Yu; Huang, Ling; Sun, Shi-Gang published the artcile< Regulating the Architecture of a Solid Electrolyte Interface on a Li-Metal Anode of a Li-O2 Battery by a Dithiobiuret Additive>, Application of C19H34O2, the main research area is solid electrolyte lithium metal anode battery.

Different from other typical architectures of lithium-ion cells (e.g., NCM//graphite, etc.), Li-metal is indispensable to the construction of Li-O2 batteries (LOBs), since Li-metal can be consumed as a lithium source for the initial discharge process on the cathode side. However, the unstable solid electrolyte interface (SEI) film and related hazardous dendrite growth plague the stability and further development of the Li-metal anode, which would be exacerbated by an O2 atmosphere in LOBs. Herein, the dithiobiuret (DTB, C2H5N3S2) additive was introduced into a typical ether electrolyte to regulate the Li+ solvated sheath configuration, and the solvation sheath was tailored and evolved to a solvent-depleted state. Consequently, an anion-derived SEI film architecture with F-rich and O-deficient components was formed. Systematically, studies of spectroscopy and electrochem. anal. demonstrated that such specific SEI architecture can trigger grain refinement and promote dendrite-free morphol. Benefiting from the addition of DTB and under an O2 atmosphere, the electrochem. performance of both Li/Li sym. cells and Li-O2 cells has been significantly enhanced.

ACS Materials Letters published new progress about Battery anodes. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Pavletic, Pegi; Semeano, Ana; Yano, Hideaki; Bonifazi, Alessandro; Giorgioni, Gianfabio; Piergentili, Alessandro; Quaglia, Wilma; Sabbieti, Maria Giovanna; Agas, Dimitrios; Santoni, Giorgio; Pallini, Roberto; Ricci-Vitiani, Lucia; Sabato, Emanuela; Vistoli, Giulio; Del Bello, Fabio published the artcile< Highly Potent and Selective Dopamine D4 Receptor Antagonists Potentially Useful for the Treatment of Glioblastoma>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is glioblastoma antitumor D4R antagonists beta arrestin stem cells.

To better understand the role of dopamine D4 receptor (D4R) in glioblastoma (GBM), in the present paper, new ligands endowed with high affinity and selectivity for D4R were discovered starting from the brain penetrant and D4R selective lead compound 1-(3-(4-phenylpiperazin-1-yl)propyl)-3,4-dihydroquinolin-2(1H)-one (6). In particular, the D4R antagonist 24, showing the highest affinity and selectivity over D2R and D3R within the series (D2/D4 = 8318, D3/D4 = 3715), and the biased ligand 29, partially activating D4R Gi-/Go-protein and blocking β-arrestin recruitment, emerged as the most interesting compounds These compounds, evaluated for their GBM antitumor activity, induced a decreased viability of GBM cell lines and primary GBM stem cells (GSC#83), with the maximal efficacy being reached at a concentration of 10 μM. Interestingly, the treatment with both compounds 24 (I) and 29 (II) induced an increased effect in reducing the cell viability with respect to temozolomide, which is the first-choice chemotherapeutic drug in GBM.

Journal of Medicinal Chemistry published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Sayama, Shinsei published the artcile< Convenient transformation of 3-alkoxyfurans to 2-Alkoxy-3-furanones or cis-2-alkoxy-2-butene-1,4-diones with phenyltrimethylammonium tribromide>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is transformation alkoxyfuran furanone butenedione preparation phenyltrimethylammonium tribromide; ring opening oxidative chemoselective phenyltrimethylammonium tribromide alkoxy furan; oxidation phenyltrimethylammonium tribromide alkoxy furan; oxidative ring opening alkoxy phenylfuran alkoxy butenedione PTAB DMSO.

3-Alkoxy-2,5-diphenylfurans and 3-alkoxy-2,4,5-triphenylfurans were converted to 2-alkoxy-3-furanones with phenyltrimethylammonium tribromide (PTAB) in various alcs. at room temperature The oxidative ring-opening of 3-alkoxy-2,5-diphenylfurans to cis-2-alkoxy-2-butene-1,4-diones was also accomplished with PTAB in DMSO.

Heterocycles published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Eaton, John K.; Furst, Laura; Cai, Luke L.; Viswanathan, Vasanthi S.; Schreiber, Stuart L. published the artcile< Structure-activity relationships of GPX4 inhibitor warheads>, Category: esters-buliding-blocks, the main research area is structure preparation GPX4 inhibitor propiolamide NO warhead; Covalent inhibitors; Ferroptosis; GPX4; Masked electrophiles.

Direct inhibition of GPX4 requires covalent modification of the active-site selenocysteine. While phenotypic screening has revealed that activated alkyl chlorides and masked nitrile oxides can inhibit GPX4 covalently, a systematic assessment of potential electrophilic warheads with the capacity to inhibit cellular GPX4 has been lacking. Here, we survey more than 25 electrophilic warheads across several distinct GPX4-targeting scaffolds. We find that electrophiles with attenuated reactivity compared to chloroacetamides are unable to inhibit GPX4 despite the expected nucleophilicity of the selenocysteine residue. However, highly reactive propiolamides we uncover in this study can substitute for chloroacetamide and nitroisoxazole warheads in GPX4 inhibitors. Our observations suggest that electrophile masking strategies, including those we describe for propiolamide- and nitrile-oxide-based warheads, may be promising for the development of improved covalent GPX4 inhibitors.

Bioorganic & Medicinal Chemistry Letters published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Olsen, Sigurd; Bredoch, Ragnar published the artcile< Oxygen containing ring systems. The synthesis of oxacycloheptan-4-one and 4,4'-oxido-4-methyltetrahydropyran>, SDS of cas: 112-63-0, the main research area is .

MeCH(OAc)-(CH2)2OAc distilled at atm. pressure with p-MeC6H4SO3H.H2O and the crude distillate treated with concentrated H2SO4 and glacial AcOH and paraformaldehyde yielded 4-acetoxytetrahydropyran (I), b9 71.5, n20D 1.4413, d20 1.0692, MRD 35.62. I (269 g.) transesterified with MeOH-HCl yielded 188 g. 4-OH analog (II) of I, b13 88.5°, n20D 1.461, d20 1.0649, MRD 26.20; p-nitrobenzoate, m. 69-71° (petr. ether); phenylurethan, 97-9° (ligroine); α-naphthylurethan, m. 130-2° (ligroine). II (96 g.) in 375 cc. H2O treated with cooling and stirring during 0.5 hr. with 120 g. Na2Cr2O7, 125 cc. H2O, and 176 cc. concentrated H2SO4, allowed to stand 15 hrs., neutralized with solid Na2CO3, extracted with 3.5 l. Et2O, and the extract worked up gave 8.5 g. unchanged II and 49 g. 4-oxotetrahydropyran (III), b11 57-9°, n20D 1.451, d20 1.0825, MRD 24.92; 2,4-dinitrophenylhydrazone, m. 186-8°; phenylsemicarbazone, m. 170-1°. III (25 g.) in 190 cc. MeOH treated at room temperature during 15 min. in 2 portions with 10% excess CH2N2 in Et2O, kept 15 hrs., and worked up gave 22.8% 4,4′-oxido-4-methyltetrahydropyran (IV), b8 44-5°, n20D 1.450, d20 1.055, MRD 29.08, and 60% oxacycloheptan-4-one (V), b8 68°, n20D 1.4611, d20 1.0682, MRD 29.33, decomposed by boiling with 2N HCl; phenylsemicarbazone, m. 168-9° (EtOH); 2,4-dinitrophenylhydrazone, m. 173-4° (MeOH). V (3 g.) in 20 cc. H2O treated with 16.7 g. KMnO4 in 500 cc. H2O and 1 cc. 30% aqueous NaOH, warmed on the water bath, filtered, treated with 5 cc. concentrated HCl, evaporated, and the residue extracted 2.5 hrs. with Et2O gave 1.6 g. (CH2CO2H)2, m. 184-6°. V (35 g.) added dropwise with stirring during 20 min. to 4.3 g. LiAlH4 in 175 cc. dry Et2O, refluxed 1 hr., decomposed with dilute H2SO4, and worked up in the usual manner gave 31.5 g. oxacycloheptan-4-ol (VI), b8 84-6° n22D 1.471, d22 1.0595, MRD) 30.64. V (12 g.) in 170 cc. MeOH hydrogenated 26 hrs. over 870 mg. PtO2, filtered, and distilled gave 10 g. VI; phenylurethan, m. 84-6° (ligroine); α-naphthylurethan, m. 119-21° (ligroine). VI (61 g.) and 75 cc. Ac2O refluxed 2 hrs. with a few drops concentrated H2SO4, diluted with H2O and aqueous NaHCO3, extracted with Et2O, and the extract worked up gave 52 g. acetate (VII) of VI, b9 86° n20D 1.450, d20 1.0595, MRD 40.13. VII (64 g.) heated 3.5 hrs. with 4.5 g. p-MeC6H4SO3H at 300-25°, the distillate (45 g.), b. 75-96° basified with aqueous Na2CO3 and extracted with Et2O, and the extract distilled gave 27.5 g. oxa-3-cycloheptene (VIII), b760 98-100°, n20D 1.4562, d20 0.9266, MRD 28.80. VIII (1 g.) added dropwise with stirring to 8.6 g. KMnO4 and 2 g. Na2CO3 in 250 cc. H2O at 60°, heated 2 hrs. on the water bath, filtered, acidified, evaporated, and the residue extracted 5 hrs. with Et2O yielded 1 g. acid mixture which chromatographed gave (CH2CO2H)2. VIII (11 g.) in 210 cc. MeOH hydrogenated 15 min. over 0.782 g. gave 3.5 g. oxacycloheptane (IX), b. 119.5°, n19.5D 1.4358, d19.5 0.8875, MRD 29.49. IX (0.3 cc.) and 4 cc. 66% HBr heated 18 hrs. at 105°, extracted with Et2O, and the extract worked up gave 0.7 g. Br(CH2)6Br (X). X (0.7 g.) refluxed with excess PhONa in EtOH 15 min., filtered, and cooled gave [(CH2)3OPh]2, m. 83-5°. IV (16 g.) and 0.25 g. ZnCl2 distilled at 240-340° gave 11 g. distillate, b. 110-67°, which contained unchanged IV and 4-formyltetrahydropyran (XI); 2,4-dinitrophenylhydrazone, m. 166-8° (MeOH); semicarbazone, 194-6° (H2O). A portion of the distillate kept several days in a stoppered container gave dimeric XI, m. 218-23° (MeOH); another portion of the distillate kept under O during several days, the resulting crystalline material treated with H2O, and the insoluble portion filtered off gave dimeric XI; the filtrate evaporated yielded tetrahydropyran-4-carboxylic acid, m. 88-90°. VIII (14 g.) distilled during 5 hrs. under a weak air stream over 10% Pd-asbestos at 350° and the effluent condensed in a liquid air trap yielded 12.5 g. mainly unchanged VIII and about 0.5 cc. H2O. The infrared absorption spectra of tetrahydro-γ-pyrone, Δ3-dihydropyran, II, V, VI, and VIII are recorded.

Chemische Berichte published new progress about Blood pressure. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

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

Stetter, Hermann; Rauscher, Elli published the artcile< Compounds with urotropine structure. XVII. Adamantane-1-carboxylic acid>, Computed Properties of 112-63-0, the main research area is .

A series of reactions of adamantane-1-carboxylic acid (I), its acid chloride (II), and its Et ester (III) was described. [R = 1-adamantyl throughout this abstract]. RBr (12 g.) in 360 cc. concentrated HCl cooled to 10°, treated dropwise with stirring with 50 cc. HCO2H, stirred 4 h., filtered, poured onto ice, and filtered gave 96% I. I (10 g.) and 20 cc. SOCl2 refluxed 0.5 h. and evaporated, the residue treated with 10 cc. C6H6, the C6H6 distilled, and this procedure repeated gave nearly 100% II. II from 3.6 g. I in 25 cc. dry Et2O added dropwise with stirring and cooling to 4.0 g. PhNH2 in 30 cc. dry Et2O, the mixture stirred 0.5 h., evaporated, the residue extracted with dilute HCl and H2O, and recrystallized from aqueous MeOH gave 4.2 g. anilide of I, m. 197°. I (10.0 g.) and 20 cc. Ac2O distilled to 120° vapor temperature, treated again with 10 cc. Ac2O, the distillation repeated, the excess Ac2O removed in vacuo, and the residue cooled gave 6.0 g. anhydride of I, m. 229° (petr. ether). III (10 g.), 25 cc. 80% N2H4.H2O, and 100 cc. (HOCH2CH2)2O refluxed 30-40 h., cooled, diluted with 300 cc. H2O, and filtered gave 8.7 g. hydrazide (IV) of I, m. 156-7° (aqueous MeOH). NaOH (1.35 g.) in 4.0 cc. H2O and 6.1 g. II in 10 cc. dry Et2O added dropwise simultaneously with stirring to 1.44 g. NaOH in 15 cc. H2O and 2.0 g. N2H4.H2SO4, the mixture stirred briefly, and filtered yielded 7.2 g. (NHO2CR)2, m. 255-6° (aqueous MeOH). IV (6.0 g.) in 60 cc. dry C5H5N treated with stirring and cooling during 15 min. with 6.0 g. p-MeC6H4SO2Cl in portions, stirred 2 h. at room temperature, and poured into 400 cc. 2N HCl gave nearly 100% p-MeC6H4SO2NHNHOCR (V), m. 192°. III (22.5 g.) in 50 cc. dry xylene added dropwise with stirring during 2 h. to 5.0 g. Na in 200 cc. dry xylene under N, heated 1 h. with stirring, cooled, treated dropwise with stirring with 10 cc. concentrated H2SO4 in 50 cc. H2O, diluted with H2O, the aqueous phase extracted with xylene, and the combined xylene solutions washed, dried, and evaporated gave 14.5 g. RCOCH(OH)R (VI), m. 223-4° (glacial AcOH). VI (6.5 g.) in THF added with stirring to 0.5 g. LiAlH4 in 100 cc. dry THF, refluxed 0.5 h., and worked up gave 6.2 g. (RCHOH)2 (VII), m. 257-65° (AcOH), apparently a mixture of isomers. V (11.0 g.) in 200 cc. (CH2OH)2 treated at 160-5° with 11 g. Na2CO3, diluted with 200 cc. H2O after 5 min., cooled, extracted with Et2O, the extract worked up, and the distillate, b0.01 130-40°, (2.5 g.) dissolved in EtOH and treated with 2,4-(O2N)2C6H3NHNH2 gave 1.4 g. 2,4-(O2N)2C6H3NHN:CHR (VIII), m. 225°. VII (2.0 g.) in 150 cc. dry C6H6 and 1 cc. glacial AcOH treated with stirring at 60° during 0.5 h. with 4 g. Pb(OAc)4 in small portions, cooled, filtered, evaporated in vacuo, and the residue in EtOH treated with excess 2,4-(O2N)2C6H3NHNH2 gave 2.6 g. VIII, m. 225°. Similarly was prepared H2NCONHN:CHR, m. 226°. VI (5.0 g.) in 80 cc. glacial AcOH and 0.5 g. concentrated H2SO4 treated with stirring with 0.8 g. CrO3 in 10 cc. 70% AcOH at 30-50°, the mixture poured onto ice, extracted with Et2O, and the extract worked up gave (RCO)2, m. 219° (AcOH). VII (1.0 g.) in 10 cc. concentrated H2SO4 kept 2 days at room temperature, poured into iced H2O, and filtered yielded about 90% RCO-CH2R, m. 277-8° (EtOH). CdCl2 (9.7 g.) added with stirring to PhMgBr from 2.5 g. Mg and 16.2 g. PhBr in 100 cc. absolute Et2O, warmed to room temperature, refluxed 1.5 h., the Et2O distilled, the residue treated with 50 cc. dry C6H6, the suspension refluxed 1 h. with stirring, cooled, treated with ice and then 20% H2SO4, the C6H6 layer worked up, and the residue dissolved in a little MeOH and cooled to -78° gave 9.0 g. BzR, m. 55-6°. The Friedel-Crafts reaction with II and C6H6 gave as the only product RPh. BzR (0.5 g.), 0.5 g. NH2OH.HCl, and 2.0 g. KOH in 10 cc. EtOH refluxed 2 h., cooled, diluted with an equal volume of H2O, and filtered gave 100% RPhC:NOH, m. 224° (dioxane). BzR (0.5 g.) in 10 cc. EtOH treated with a solution of 0.5 g. 2,4-(O2N)2C6H3NHNH2, the mixture kept some time, and filtered gave 100% 2,4-(O2N)2C6H3NHN:CRPh, m. 242-4° (EtOAc-EtOH). III (7.0 g.) in 15 cc. dry Et2O added dropwise during 0.5 h. with cooling to PhMgBr from 2.0 g. Mg and 12.5 g. PhBr in 35 cc. dry Et2O, the mixture refluxed 3-4 h. with stirring, cooled, treated with stirring with iced H2O and HCl, worked up in the usual manner, and the sirupy residue digested with a little MeOH gave 5.8 g. Ph2C(OH)R, m. 127-8°, also obtained in 70% yield from 5.0 g. IV with PhMgBr from 2.5 g. Mg and 16.2 g. PhBr in Et2O. Ph2C(OH)R (5.0 g.), 30 cc. SOCl2, and 20 cc. AcCl mixed, refluxed 0.5 h., and evaporated gave 3.8 g. Ph2CClR, m. 150-2° (petr. ether). Ph2CClR (0.5 g.) in 5 cc. dry refluxing THF treated during 10 min. with 3 cc. absolute MeOH, the mixture refluxed 1 h., cooled, and filtered gave 0.45 g. Ph2C(OMe)R, m. 202° (petr. ether).

Chemische Berichte published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Geri, Jacob B.; Wade Wolfe, Michael M.; Szymczak, Nathaniel K. published the artcile< The Difluoromethyl Group as a Masked Nucleophile: A Lewis Acid/Base Approach>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is difluoromethyl arene heteroarene preparation difluoromethyl group masked nucleophile electrophile; Lewis acid bronsted superbase deprotonation aryl difluoromethyl synthon intermediate.

The difluoromethyl group (R-CF2H) imparts desirable pharmacokinetic properties to drug mols. and is commonly targeted as a terminal functional group that is not amenable to further modification. Deprotonation of widely available Ar-CF2H starting materials to expose nucleophilic Ar-CF2- synthons represents an unexplored, yet promising route to construct benzylic Ar-CF2-R linkages. Here we show that the combination of a Bronsted superbase with a weak Lewis acid enables deprotonation of Ar-CF2H groups and capture of reactive Ar-CF2- fragments. This route provides access to isolable and reactive Ar-CF2- synthons that react with a broad array of electrophiles at room temperature The methodol. is highly general in both electrophile and difluoromethyl (hetero)arene and can be applied directly to the synthesis of benzylic difluoromethylene (Ar-CF2-R) linkages, which are useful lipophilic and metabolically resistant replacements for benzylic linkages in medicinal chem.

Journal of the American Chemical Society published new progress about Bronsted bases Role: RGT (Reagent), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Matius, Michelle; Mastuli, Mohd Sufri published the artcile< Catalytic esterification of palm fatty acid distillate into biodiesel over sulfonated iron oxide catalyst>, Formula: C19H34O2, the main research area is sulfonated iron oxide esterification catalyst surface structure area.

The palm fatty acid distillate (PFAD), as a low-cost feedstock, was catalytically esterified into biodiesel (also known as fatty acid Me ester, FAME) using sulfonated iron oxide (HSO3-/Fe2O3) catalyst. In this work, the catalyst was synthesized via self-propagating combustion (SPC) method, towards a greener synthesis technique, followed by sulfonation with chlorosulfonic acid (HSO3Cl) to enhance the catalyst’s acid properties. The catalysts were characterised and the success of sulfonation process was determined From this study, Fe2O3 catalysts were proven to be pure and single-phase. The success of the sulfonation then was verified by the presence of sulfur, functional groups of S-O asym. vibration and S = O sym. vibration, and increasing total acidity. Then, the sulfonated Fe2O3 catalyst was used to esterify the PFAD feedstock in methanol in which the esterification parameters were also optimized to obtain maximum free fatty acid (FFA) conversion. It was found that 15:1 of methanol-to-PFAD molar ratio, 4 weight% of catalyst loading, 80°C of reaction temperature and 5 h of reaction time produced 95.5% of FFA conversion. Interestingly, the sulfonated Fe2O3 catalyst can be considered as a superacid solid catalyst that enables boosting the esterification of the PFAD feedstock into biodiesel.

Journal of the Japan Institute of Energy published new progress about Acid number. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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