Tag: M.W=200-300

Related Products of 144978-35-8, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 144978-35-8, Name is 1-Boc-D-Pyroglutamic acid ethyl ester, SMILES is O=C1CC[C@H](C(OCC)=O)N1C(OC(C)(C)C)=O, belongs to amides-buliding-blocks compound. In a article, author is Caneda-Martinez, Laura, introduce new discover of the category.

Evaluation of vinburnine in pharmaceuticals by smart spectrophotometric methods; full stability study

Vinburnine (VNB) is a vinca alkaloid used as a vasodilator to enhance cerebral circulatory insufficiency. It is a cyclic amide containing drug which is expected to be sensitive to hydrolytic degradation. The degradation profile of VNB was studied in this work following ICH recommendations for stability study. The drug was sensitive only to degradation with NaOH with the formation of the carboxylic acid derivative, identified by IR and H-1 NMR analyses as 2-((1S,12bS)-1-ethyl-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a] quinolizin-1-yl) acetic acid, (DEG). In this study five simple, smart and univariate stability indicating spectrophotometric methods were developed and validated for simultaneous determination of VNB and DEG for the first time. The developed methods include; Dual Wavelength Method (DWM), Dual Wavelength Resolution Method (DWRM), Factorized Absorbance Difference Method (FADM), Advanced Absorbance Subtraction Method (AASM), and Derivative Amplitude Factor Method (DAFM). These methods were capable of determination of VNB and DEG over the ranges of 1-30 and 3-50 mu g/mL, respectively. The proposed methods were simple, smart, specific, and could be applied for analyzing synthetic mixtures of VNB and DEG and were successfully applied for determination of the drug in commercially available capsules. The obtained results of these methods were statistically compared with the reported HPLC one using student’s-t and F- tests, where no significant difference was observed. Validation of the developed methods was applied according to ICH recommendations and all the results were within the acceptable limits. Published by Elsevier B.V.

Related Products of 144978-35-8, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 144978-35-8.

Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 138-41-0, Name is Carzenide, molecular formula is C7H7NO4S, belongs to amides-buliding-blocks compound, is a common compound. In a patnet, author is Gontala, Arjun, once mentioned the new application about 138-41-0, Recommanded Product: 138-41-0.

Preparation of Functionalized Diaryl-and Diheteroaryllanthanum Reagents by Fast Halogen-Lanthanum Exchange

Aryl and heteroaryl halides (X= Br, I) undergo a fast and convenient halogen-lanthanum exchange with nBu(2)LaMe, which leads to functionalized diaryl-and dihetero-aryllanthanum derivatives. Subsequent trapping reactions with selected electrophiles, such as ketones, aldehydes, or amides, proceeded smoothly at -508 degrees C in THF, affording polyfunctionalized alcohols and carbonyl derivatives. Kinetic competition experiments revealed a similar reactivity trend as for Br/Mg exchange, but 106-times higher rates, making it comparable to Br/Li exchange.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 138-41-0. The above is the message from the blog manager. Recommanded Product: 138-41-0.

Electric Literature of 2419-56-9, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 2419-56-9, Name is H-Glu(OtBu)-OH, SMILES is [H][C@](N)(CCC(=O)OC(C)(C)C)C(O)=O, belongs to amides-buliding-blocks compound. In a article, author is Ni, Jizhi, introduce new discover of the category.

Receptor structure-based discovery of non-metabolite agonists for the succinate receptor GPR91

Objective: Besides functioning as an intracellular metabolite, succinate acts as a stress-induced extracellular signal through activation of GPR91 (SUCNR1) for which we lack suitable pharmacological tools. Methods and results: Here we first determined that the cis conformation of the succinate backbone is preferred and that certain backbone modifications are allowed for GPR91 activation. Through receptor modeling over the X-ray structure of the closely related P2Y1 receptor, we discovered that the binding pocket is partly occupied by a segment of an extracellular loop and that succinate therefore binds in a very different mode than generally believed. Importantly, an empty side-pocket is identified next to the succinate binding site. All this information formed the basis for a substructure-based search query, which, combined with molecular docking, was used in virtual screening of the ZINC database to pick two serial mini-libraries of a total of only 245 compounds from which sub-micromolar, selective GPR91 agonists of unique structures were identified. The best compounds were backbone-modified succinate analogs in which an amide-linked hydrophobic moiety docked into the side-pocket next to succinate as shown by both loss- and gain-of-function mutagenesis. These compounds displayed GPR91-dependent activity in altering cytokine expression in human M2 macrophages similar to succinate, and importantly were devoid of any effect on the major intracellular target, succinate dehydrogenase. Conclusions: These novel, synthetic non-metabolite GPR91 agonists will be valuable both as pharmacological tools to delineate the GPR91-mediated functions of succinate and as leads for the development of GPR91-targeted drugs to potentially treat low grade metabolic inflammation and diabetic complications such as retinopathy and nephropathy. (C) 2017 The Authors. Published by Elsevier GmbH.

Electric Literature of 2419-56-9, Because enzymes can increase reaction rates by enormous factors and tend to be very specific, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 2419-56-9.

2432-99-7, Name is 11-Aminoundecanoic acid, molecular formula is C11H23NO2, COA of Formula: C11H23NO2, belongs to amides-buliding-blocks compound, is a common compound. In a patnet, author is Li, Lina, once mentioned the new application about 2432-99-7.

Molecular modeling analyses of polyaniline substituted with alkali and alkaline earth elements

Polyaniline which is termed as PANi is chosen as model molecule where substitution with Li, Na, K, Be, Mg and Ca is carried out. Each metal is supposed to interact with PANi throughout the amide group at the terminal and then in the middle of PANi. Quantum mechanical calculations at B3LYP/6-31G (d,p) level are conducted for PANi as well as substituted PANi. Bond distances, bond angles, total dipole moment (TDM), frontier band gap energy (HOMO/LUMO) as well as molecular electrostatic potential (ESP) are calculated. Results indicate that for terminal amide group interaction, PANi-Na has the highest TDM (10.5996 Debye) and the lowest HOMO/LUMO band gap energy (2.0169 eV). Also for PANi-Ca, TDM (6.4356 Debye); HOMO/LUMO (1.1970 eV). For the interaction through the middle NH group, PANi-K and PANi-Mg are the more active sites for interaction as they have the highest TDM, having the the lowest HOMO/LUMO band gap energies of 1.6732 and 1.3168 eV values of 11.5939 and 3.1208 Debye respectively, and respectively. ESP drives a general conclusion that the electronegativity of PANi increases significantly by the presence of alkali metals and increases slightly by the presence of alkaline earth metals. Additionally, there are changes in the geometrical parameters (including both bond lengths and bond angles) for all studied model molecules.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 2432-99-7 help many people in the next few years. COA of Formula: C11H23NO2.

4943-86-6, name is 2-Amino-N-(4-chlorophenyl)benzamide, belongs to amides-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. COA of Formula: C13H11ClN2O

General procedure: A mixture of 4-methoxybenzyl alcohol (0.138 g, 1 mmol), I2 (0.254 g, 1 mmol), K2CO3(0.138 g, 1 mmol), isatoic anhydride (0.163 g, 1 mmol) and aniline (0.093 g,1 mmol) in water (5 mL) was stirred for 3 h at reflux. After reaction completion,the mixture was cooled to room temperature and stirred for 1 h. The resultingprecipitate was filtered, washed with water (3 3 mL), and purified by recrystallization from ethanol to give 4a as a white solid.

The synthetic route of 4943-86-6 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Azimi, Seyedeh Bahareh; Azizian, Javad; Tetrahedron Letters; vol. 57; 2; (2016); p. 181 – 184;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Reference of 174799-52-1, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 174799-52-1, name is tert-Butyl (2-(benzylamino)ethyl)carbamate belongs to amides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

To a mixture of tert-butyl 2-(benzylamino)ethylcarbamate (2.8 g, 11.2 mmol) and 37% aqueous CH2O (1.0 mL, 11.2 mmol) in 1,2-dicholoroethane (35 mL) at RT was added NaHB(AcO)3 (3.7 g, 11.2 mmol). The mixture was stirred (RT, 16 h), diluted with saturated aqueous NaHCO3 (400 ml) and extracted with EA (3*300 ml). The organic layer was dried over MgSO4 and concentrated under reduced pressure to afford tert-butyl 2-(benzyl(methyl)amino)ethylcarbamate (1.38 g, 46.8%). 1H-NMR (CDCl3): delta7.25 (m, 5H, CH), 3.5 (s, 2H, CH2), 3.3 (m, 2H, CH2), 2.48 (m, 2H, CH2), 2.2 (s, 3H, CH3), 1.4 (s, 9H, CH3).

The synthetic route of tert-Butyl (2-(benzylamino)ethyl)carbamate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Milne, Jill C.; Jirousek, Michael R.; Bemis, Jean E.; Smith, Jesse J.; US2010/41748; (2010); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 141449-85-6, name is tert-Butyl hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate, This compound has unique chemical properties. The synthetic route is as follows., Formula: C11H20N2O2

A catalyst solution was prepared by mixing tris(dibenzylideneacetone)dipalladium (Pd2(dba)3; 35 mg, 0.038 mmol; Alfa) and racemic 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (BINAP; 61 mg, 0.098 mmol; Strem) in toluene (1 mL) and heating the mixture to 80 C. for 15 min. The solution was cooled, and then added to a mixture of 3-Boc-3,7-diazabicyclo[3.3.0]octane (483 mg, 2.28 mmol; see WO 0181347) and 2,7-dibromofluoren-9-one (336 mg, 0.994 mmol; Aldrich) in toluene (5 mL). Sodium tert-butoxide (276 mg, 2.87 mmol; Aldrich) was then added, and the reaction mixture was purged with nitrogen and heated to 80-85 C. overnight (16 h). After cooling to room temperature, the mixture was filtered through diatomaceous earth and purified by chromatography (80 g silica gel, 10-100% EtOAc-hexanes) to afford the title compound (322 mg, 0.537 mmol, 54% yield). MS (DCl/NH3): m/z 601 (M+1)+.

According to the analysis of related databases, 141449-85-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Schrimpf, Michael R.; Sippy, Kevin B.; Ji, Jianguo; Li, Tao; Frost, Jennifer M.; Briggs, Clark A.; Bunnelle, William H.; US2005/234031; (2005); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 956434-30-3, name is tert-Butyl 8-chloro-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate, This compound has unique chemical properties. The synthetic route is as follows., name: tert-Butyl 8-chloro-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate

(step 1) To a solution of (2R)-3-methylbutan-2-ol (0.38 mL) in toluene (8 mL) was added sodium hydride (0.28 g), and the resulting mixture was stirred at 70C for 15 min under a nitrogen atmosphere. A mixture of tert-butyl 8-chloro-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate (1.0 g), BINAP (0.066 g), Pd2(dba)3 (0.048 g) and toluene (8 mL) was added, and the resulting mixture was stirred at 100C for 2 hr under an argon atmosphere. The reaction solution was poured into water, and the resulting product was extracted with ethyl acetate. The organic layer was washed with water and saturated brine and dried, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (solvent gradient; 0?40% ethyl acetate/hexane) to give tert-butyl 8-{[(1R)-1,2-dimethylpropyl]oxy}-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate (0.77 g, 65%) as a white powder. 1H-NMR(CDCl3):delta0.94(3H,d,J=6.8Hz), 0.96(3H,d,J=6.6Hz), 1.23(3H,d,J=6.2Hz), 1.43(9H,s), 1.82-1.95(1H,m), 3.81(2H,brs), 4.21(2H,brs), 4.34-4.43(2H,m), 4.97(1H,brs), 6.40(1H,brs), 7.30-7.50(1H,m)

According to the analysis of related databases, 956434-30-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Takeda Pharmaceutical Company Limited; EP2213675; (2010); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 149423-70-1 as follows. HPLC of Formula: C14H20N2O2

Amine D1.1 (Prepared as described in Bauer, Shawn M.; Jia, Zhaozhong J.; Song, Yonghong; Xu, Qing; Mehrotra, Mukund; Rose, Jack W.; Huang, Wolin; Venkataramani, Chandrasekar; Pandey, Anjali. PCT mt. Appi. (2009), W02009145856A1.) (1.92 g, 7.7 mmol) was diluted with dichioromethane (30 mL) affording an opaque solution. To this was added di-tbutyl dicarbonate (2.0 g, 9.3 mmol) in two portions. The resulting solution was then stirred for approximately 1 hr at which time the reaction was determined to be complete by UPLC. The reaction mixture was then concentrated and dried in vacuo overnight affording 2.47 g of the diprotected diamine as a light pink syrup. MS found for C11H21N202 as (M – Boc+2H) 249.2 and (M+Na)+ = 371.4.

According to the analysis of related databases, 149423-70-1, the application of this compound in the production field has become more and more popular.

Reference:
Patent; PORTOLA PHARMACEUTICALS, INC.; JIA, Zhaozhong J.; KANE, Brian; XU, Qing; BAUER, Shawn M.; SONG, Yonghong; PANDEY, Anjali; DICK, Ryan; WO2013/78468; (2013); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Synthetic Route of 79722-21-7, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 79722-21-7, name is tert-Butyl benzyloxycarbamate belongs to amides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: Nucleophile (1-3 mol equiv), tris-(dibenzylideneacetone)dipalladium (2.5 mol %), tris-(2-furyl)phosphine (10 mol %) and potassium carbonate (2 mol equiv) were added to a solution of the aryl halide (1 mmol) in dry dimethylformamide (10 mL) in a Schlenk tube. The reaction mixture was then degassed using the freeze, pump, thaw (F.P.T.) technique (one cycle). Allene gas was then introduced at the required pressure (1 atm) and the Schlenk tube contents stirred and heated at 80 C for 16 h. After cooling and venting, DCM (20 mL) was added and the mixture filtered to remove inorganic salts. The filtrate was concentrated in vacuo and the residue was purified by column chromatography.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, tert-Butyl benzyloxycarbamate, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Elboray, Elghareeb E.; Gao, Chuanjun; Grigg, Ronald; Tetrahedron; vol. 68; 14; (2012); p. 3103 – 3111;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics