Month: October 2022

Madry, Tomasz; Czapik, Agnieszka; Kwit, Marcin published the artcile< Optical Activity and Helicity Enhancement of Highly Sensitive Dinaphthylmethane-Based Stereodynamic Probes for Secondary Alcohols>, Quality Control of 617-55-0, the main research area is optical activity helicity enhancement dinaphthylmethane stereodynamic probe secondary alc.

The chirality transfer from CD-silent secondary alc. (inductor) to the stereodynamic bichromophoric di(1-naphthyl)methane probe (reporter) led to the generation of intense induced exciton-type Cotton effects in the UV/VIS absorption region. The di(1-naphthyl)methane probe exhibits extraordinarily high sensitivity to even small structural variations of the alc. skeleton, i.e., the probe is able to distinguish between an oxygen atom and a methylene group in a 3-hydroxytetrahydrofurane skeleton. Signs and amplitudes of the exciton couplets of 1Bb electronic transition might be correlated with the type of stereo differentiating parts of the mol., flanking the stereogenic center, however, not with the absolute configuration. The origin of the induced Cotton effects was established by means of exptl. and theor. methods. As a result, a mechanism of chirality transfer from permanent stereogenic center to the bichromophore is proposed.

ACS Omega published new progress about Bond angle, dihedral. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Quality Control of 617-55-0.

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

Drljaca, Jovana; Popovic, Aleksandra; Bulajic, Dragica; Stilinovic, Nebojsa; Vidicevic Novakovic, Sasenka; Sekulic, Slobodan; Milenkovic, Ivan; Ninkovic, Srdjan; Ljubkovic, Marko; Capo, Ivan published the artcile< Diazepam diminishes temozolomide efficacy in the treatment of U87 glioblastoma cell line>, Quality Control of 112-63-0, the main research area is U87 glioblastoma; antineoplastic agent; drug interactions; mitochondria; oxidative phosphorylation.

Aims : Many patients with glioblastoma (GBM) suffer from comorbid neurol./psychiatric disorders and, therefore, are treated with psychopharmacol. agents. Diazepam (DIA) is widely adopted to treat status epilepticus, alleviate anxiety, and inhibit chemotherapy-associated delayed emesis in GBM patients. Even though temozolomide (TMZ) and DIA could be found as possible combination therapy in clin. practice, there are no reports of their combined effects in GBM. Hence, it may be of interest to investigate whether DIA enhances the antitumor efficacy of TMZ in GBM cells. Methods : U87 human GBM was used to examine the effects of combined TMZ and DIA on cell viability, and the oxygen consumption within the cells, in order to evaluate mitochondrial bioenergetic response upon the treatment. Results : The cooperative index showed the presence of antagonism between TMZ and DIA, which was confirmed on long-term observation. Moreover, the level of apoptosis after the TMZ treatment was significantly decreased when administered with DIA (p < 0.001). Concomitant use of TMZ and DIA increased the basal cell respiration rate, the oxidative phosphorylation rate, and maximal capacity of mitochondrial electron transport chain, as well as the activities of complexes I and II, vs. TMZ alone (p < 0.001). Conclusion : Comparing our results with data reported that DIA elicits cell cycle arrest in the G0/G1 phase and favors senescence reveals that DIA diminishes TMZ efficacy in concomitant use in the treatment of GBM. However, due to its great potency to hinder GBM proliferation and metabolism, it could be considered using DIA as maintenance therapy after TMZ cycles. CNS Neuroscience & Therapeutics published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

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

Lukin, Kirill; Kishore, Vimal; Gordon, Thomas published the artcile< Development of a Scalable Synthesis of Oxadiazole Based S1P1 Receptor Agonists>, Electric Literature of 112-63-0, the main research area is scalable oxadiazole synthesis S1P1 receptor agonist; byproduct triphenylphosphine oxide removal magnesium complex formation; oxadiazole improved synthesis cyclization acylamidoxime DBU.

A robust and scalable synthesis was developed for the preparation of oxadiazole based S1P1 inhibitors I and II. A new method for the separation of triphenylphosphine oxide from reaction products and an improved method for the synthesis of oxadiazoles in the presence of DBU were incorporated into the process to achieve its scalability.

Organic Process Research & Development published new progress about Sphingosine-1-phosphate receptor 1 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Nazarov, I. N.; Semenovskii, A. V. published the artcile< Orientation of chloromethylation reaction>, Reference of 112-63-0, the main research area is .

The isomers formed in chloromethylation of aromatic compounds show o-p-isomer formation which parallels the data on nitration of halobenzenes and chlorination of halobenzenes with FeCl3 (cf. Kovacic and Brace, C.A. 49, 13133g). Passage of HCl 0.5 hr. into 100 ml. CCl4, 6 g. paraformaldehyde, and 6 g. ZnCl2, followed by 32.8 g. PhCH2CO2Et, 2 g. ZnCl2, and stirring 7 hrs. at 50�gave, after washing with H2O, 31% mixed ClCH2C6H4CH2CO2Et, b8 148-51� [n]D20 1.5240, d20 1.1623; this (3.81 g.) oxidized with 60 ml. 20% HNO3 under 30 atm. N 1.5 hrs. in an autoclave at 200�gave benzenedicarboxylic acids, 60.4% p-, 27% o- and 12.6% m-isomer, separated through the Ba salts. Similar reaction with C6H6 gave a mixture of xylylene dichlorides, b9 118.5-20� which on oxidation was shown to contain 69% p-, 16% o- and 15% m-isomers. A considerable part of the p-xylylene chloride may be frozen out and this product, m. 99-100.5� on oxidation with CrO3 in AcOH gave 98.3% terephthalic acid, while hydrolysis of the dichloride with chalk-H2O gave 78.3% p-C6H4 (CH2OH)2, m. 111-12� PhCH2Cl (63.3 g.), 15 g. paraformaldehyde, and 20 g. ZnCl2 in a stream of HCl gave 20 g. p-xylylene dichloride, m. 99-100� along with 9.7 g. liquid mixture of the o-, m-, and p-xylylene dichlorides. Passage of HCl 45 min. into 150 ml. CCl4, 17 g. paraformaldehyde, and 10 g. ZnCl2 followed by dropwise addition of 53 g. EtPh at 50�and stirring 20 min. longer gave 44.5% mixed EtC6H4CH2Cl, b12 95-101� and 12 g. (EtC6H4)2CH2, b12 150� Oxidation of the chloromethyl derivatives with CrO3-AcOH gave 70% p- and 30% o-isomers. Similar chloromethylation of cumene gave 45% mixed isomers of iso-PrC6H4CH2Cl, b15 100-10� which oxidized to 85% p- and 15% o-acids. Similarly, chloromethylation of Me3CPh gave 58% p-Me3CC6H4CH2Cl, b7 101-5� with much unreacted hydrocarbon, which oxidized with HNO3 as above gave only terephthatic acid. Passage of HCl 5 hrs. into 90 ml. concentrated HCl, 30 g. paraformaldehyde, and 80 g. EtPh, followed by stirring 20 hrs. at 50-5�gave 60% isomeric EtC6H4CH2Cl, 77% p- and 23% o-isomers as shown by oxidation with 20% HNO3, as above; similarly iso-PrPh gave 50% mixed iso-PrC6H4CH2Cl isomers, b11 98-102� which on oxidation contained 85% p- and 15% o-isomer. Passage of HCl 1.5 hrs. into 100 ml. CCl4, 30 g. paraformaldehyde, and 20 g. ZnCl2 followed by addition of 48 g. PhF and stirring 5.5 hrs. at 50�with addition of 1.5 g. ZnCl2 gave 78% mixed FC6H4CH2Cl, b17 69-74� which on freezing gave 20% p-isomer; the residue gave 3.35 g. diarylated product, b14 125-35� oxidation with CrO3-AcOH gave 80-9.6% p-isomer and about 11% o-isomer. Similar reaction with PhCl gave 62% mixed isomers of ClC6H4CH2Cl, b34 113-16� which on freezing gave 30% p-isomer, m. 27-8� the latter oxidized completely to p-ClC6H4CO2H, and oxidation of the total mixture indicated the formation of 62.6% p-isomer. Similarly, PhBr gave 76.2% mixed BrC6H4CH2Cl, b3 83-7� which gave 35% p-isomer, m. 37-8� oxidation with CrO3 showed the total formation of 58% p-isomer and residual 42-3% o-isomer. PhI similarly gave 76% chloromethylation product, b5 113-17� which gave 30% p-IC6H4CH2Cl, m. 52-3� while oxidation of the products with CrO3 showed 52.4% p- and 47% o-isomer. Oxidation of chloromethylated halobenzenes with HNO3 gave similar results for Cl and Br derivatives, but the iodine-derivative failed to give a product containing iodine.

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya published new progress about Chloromethylation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Ghosh, Subrata K.; Hu, Mengnan; Comito, Robert J. published the artcile< One-Pot Synthesis of Primary and Secondary Aliphatic Amines via Mild and Selective sp3 C-H Imination>, Related Products of 112-63-0, the main research area is primary secondary aliphatic amine preparation selective imination; C鈭扝 functionalization; amination; hydrogen-atom transfer; hypervalent iodine; radical reactions.

The direct replacement of sp3 C-H bonds with simple amine units (-NH2) remains synthetically challenging, although primary aliphatic amines are ubiquitous in medicinal chem. and natural product synthesis. Authors report a mild and selective protocol for preparing primary and secondary aliphatic amines in a single pot, based on intermol. sp3 C-H imination. The first C-H imination of diverse alkanes, this method shows useful site-selectivity within substrates bearing multiple sp3 C-H bonds. Furthermore, this reaction tolerates polar functional groups relevant for complex mol. synthesis, highlighted in the synthesis of amine pharmaceuticals and amination of natural products. Authors characterize a unique C-H imination mechanism based on radical rebound to an iminyl radical, supported by kinetic isotope effects, stereoablation, resubmission, and computational modeling. This work constitutes a selective method for complex amine synthesis and a new mechanistic platform for C-H amination.

Chemistry – A European Journal published new progress about Aliphatic amines Role: SPN (Synthetic Preparation), PREP (Preparation) (primary and secondary). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

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

Rawal, Viresh H.; Jones, Robert J.; Cava, Michael P. published the artcile< Photocyclization strategy for the synthesis of antitumor agent CC-1065: synthesis of dideoxy PDE-I and PDE-II. Synthesis of thiophene and furan analogs of dideoxy PDE-I and PDE-II>, Application of C8H9NO3, the main research area is CC 1065 intermediate; benzodipyrrole; thienoindole; furoindole.

The title compounds I (X = NH, R = NH2, Me) and their analogs I (X = O, S) were prepared by Wittig reaction of 2-pyrrolylmethyltriphenylphosphonium iodides with the aldehydes II, followed by photochem. ring closure. The cyclization products were easily converted to I.

Journal of Organic Chemistry published new progress about 7126-50-3. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, Application of C8H9NO3.

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

Watanabe, Toshio; Wang, Zun-Yao; Takahashi, Ohgi; Morihashi, Kenji; Kikuchi, Osamu published the artcile< Calculation of systematic set of bond dissociation enthalpies of polyhalogenated benzenes>, Application of C19H34O2, the main research area is systematic bond dissociation enthalpy polyhalogenated benzene.

The bond dissociation enthalpies (BDEs) of polyhalogenated benzenes were calculated by using the G2M(CC), B3LYP/6-311G(2df,p), and B3LYP/6-311G(d,p) methods. The BDEs of C-H and C-X (X = F, Cl, and Br) calculated by these three methods well reproduced the exptl. BDEs, within 1.2, 2.3, and 4.5 kcal/mol, resp. The anal. of the basis set dependence of the BDEs showed that the BDEs calculated by the B3LYP/6-311G(d,p) method are sufficient for the quant. discussion. An accurate and systematic set of the BDEs of polyhalogenated benzenes was thus obtained by B3LYP/6-311G(d,p) calculations The substitution effects on the BDEs of polyhalogenated benzenes were analyzed by using a linear scheme with and without the correction terms for steric effect. The resulting regression equation for the C-F BDEs well reproduced the calculated C-F BDEs even without the correction term for steric effect, but the regression equations for the C-Cl and C-Br BDEs needs the correction term for steric effect.

Journal of Molecular Structure: THEOCHEM published new progress about Ab initio methods (G2M(RCC)). 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

Pankova, Alena S.; Sorokina, Mariia V.; Kuznetsov, Mikhail A. published the artcile< Thermal rearrangement of 2,3-diaryl-1-phthalimidoaziridines>, HPLC of Formula: 112-63-0, the main research area is imine preparation; phthalimidoaziridine preparation thermal rearrangement regioselective.

2,3-Diaryl-1-phthalimidoaziridines I (Ar1 = Ph, 4-O2NC6H4; Ar2 = Ph, 4-CH3OC6H4, 4-ClC6H4, 2-thienyl, etc.) and 2,3-diaryl-1-phthalimidoaziridine-2-carbonitriles were found to readily undergo thermal rearrangement into imines e.g. II via 1,2-migration of the phthalimido group and accompanying C-C bond cleavage. Isomerization proceeds regioselectively with preferable migration to the electron-deficient carbon atom. Interestingly, this reaction was found to predominate even in the presence of dipolarophiles.

Tetrahedron Letters published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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

Kim, Mahn Joo; Whitesides, George M. published the artcile< L-Lactate dehydrogenase: substrate specificity and use as a catalyst in the synthesis of homochiral 2-hydroxy acids>, Application In Synthesis of 112-63-0, the main research area is oxo carboxylate reduction lactate dehydrogenase; hydroxy acid preparation lactate dehydrogenase; butene oxide enzymic preparation.

Kinetic parameters (Km, kcat) are reported for reduction of �0 �keto acids by L-lactate dehydrogenase (L-LDH; EC 1.1.1.27) from 5 sources (porcine heart, rabbit muscle, chicken liver, bovine heart, lobster tail). The L-LDH-catalyzed reduction reaction of 4 substrates representative of the range of activities observed was done on a preparative scale by using rabbit muscle L-LDH, and absolute configurations and values of enantiomeric excess (ee) of the products were determined: 2-hydroxybutanoic acid, ee > 99% S; 2-hydroxypentanoic acid, ee >99% S; cyclopropaneglycolic acid, ee >99% S; 3-phenyllactic acid, ee >99% S. This enzyme-catalyzed reduction provides a practical method for preparing 1-25-g quantities of a range of 2-hydroxy acids with high ee. To illustrate the value of these compounds as chiral synthons, (S)-2-hydroxybutanoic acid was converted to (S)-1-butene oxide having >98% ee on a 6-g scale.

Journal of the American Chemical Society published new progress about Chiral synthons. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Wahyudi, Wahyudi; Nadjib, Muhammad; Novela, Mila C.; Aprilia, Ornelia D. published the artcile< The effect of palm biodiesel composition on the physical properties of Calophylluminophyllum-palm biodiesel mixture>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Calophyllum palm oil biodiesel phys property.

The increasing energy consumption and depletion of fossil fuels require the need for alternative source of fuels. Biodiesel is an alternative fuel developed and can replace or reduce the use of petroleum diesel. One of its development processes is to change fatty acid composition through the mixing of different raw materials namely Calophyllum inophyllum and palm oil. Calophylluminophyllum oil is a non-edible raw, while palm oil is an edible raw material which is abundantly produced. The research was carried out by processing palm and Calophylluminophyllum oil into biodiesel using transesterification. Furthermore, both kinds of biodiesel were mixed with 11 variations of the composition The results showed that mixing biodiesel Calophyllum inophyllum and palm oil produced pos. results with decreased viscosity and increased calorific value.

IOP Conference Series: Materials Science and Engineering published new progress about Biodiesel fuel. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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