Tag: M.W=400-500

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 14481-08-4, is researched, Molecular C22H38NiO4, about Deposition of mixed conducting oxides thin films on porous ceramic substrates, the main research direction is spray calcination lanthanum nickelate membrane porous ceramic substrate.HPLC of Formula: 14481-08-4.

Dense layers of La nickelate were deposited on flat porous ceramic substrates, by spray pyrolysis for applications of O permeation. As-deposited layers were either amorphous or partially crystalline depending on temperature After annealing treatment at 700° in air, they are constituted of La2NiO4 or LaNiO3 crystalline grains embedded in an amorphous matrix by x-ray diffraction and TEM. In the case of porous ceramic substrates without defects, amorphous layers are gas-tight. Although a formation of small cracks leading to small leaks occurs through annealing treatments, such leaks can be suppressed using a multilayer deposition procedure.

Here is a brief introduction to this compound(14481-08-4)HPLC of Formula: 14481-08-4, if you want to know about other compounds related to this compound(14481-08-4), you can read my other articles.

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

He, Cheng-Yu; Li, Qing-Hua; Wang, Xin; Wang, Feng; Tian, Ping; Lin, Guo-Qiang published the article 《Copper-Catalyzed Asymmetric Borylative Cyclization of Cyclohexadienone-Containing 1,6-Dienes》. Keywords: copper catalyzed asym borylative cyclization cyclohexadienone diene; borylated tetrahydrobenzofuranone preparation; crystal structure borylated tetrahydrobenzofuranone; mol structure borylated tetrahydrobenzofuranone.They researched the compound: (((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene))bis(diphenylphosphine)( cas:32305-98-9 ).Application In Synthesis of (((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene))bis(diphenylphosphine). Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:32305-98-9) here.

Due to the low reactivity of 1,6-dienes and the challenge of selectively differentiating such two olefins, the development of metal-catalyzed asym. cyclization of 1,6-dienes remains largely underdeveloped. Herein, the authors describe the 1st Cu(I)-catalyzed asym. borylative cyclization of cyclohexadienone-tethered terminal alkenes (1,6-dienes) via a tandem process: the regioselective borocupration of the electron-rich terminal alkene and subsequent conjugate addition of stereospecific secondary alkyl-Cu(I) to the electron-deficient cyclohexadienone, affording enantioenriched bicyclic skeletons bearing three contiguous stereocenters in all cis-form. Meanwhile, this mild catalytic protocol is generally compatible with a wide range of functional groups, which allows further facile conversion of the cyclization products.

Here is a brief introduction to this compound(32305-98-9)Application In Synthesis of (((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene))bis(diphenylphosphine), if you want to know about other compounds related to this compound(32305-98-9), you can read my other articles.

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

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Atmospheric pressure chemical vapor deposition and characterization of crystalline InTaO4, InNbO4 and InVO4 coatings.Application of 14481-08-4.

The possibilities to grow crystalline complex InTaO4, InNbO4, and InVO4 coatings as well as single oxide layers In2O3, Ta2O5, Nb2O5, and VOx were investigated using aerosol assisted atm. pressure chem. vapor deposition technique. In(III) and Nb(IV) tetramethylheptanedionates, Ta(V) tetraethoxyacetylacetonate, and V(III) acetylacetonate were used as precursors, monoglyme and toluene as solvents. The influence of deposition conditions and solution composition on elemental and phase compositions of layers was studied. InTaO4 layers containing pure monoclinic InTaO4 phase were obtained ex-situ, i.e., after 800° annealing of layers grown at 500°. Films containing pure orthorhombic InVO4 or monoclinic InNbO4 phase may be prepared using both in-situ (600°) or ex-situ (deposition at 400°, annealing at 800°) approaches. Under optimized deposition conditions and solution compositions, Ni-doped InVO4 and InTaO4 films were also deposited and their photocatalytic activity was tested.

Here is a brief introduction to this compound(14481-08-4)Application of 14481-08-4, if you want to know about other compounds related to this compound(14481-08-4), you can read my other articles.

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

Reference of 88744-04-1,Some common heterocyclic compound, 88744-04-1, name is 9-Fluorenylmethyl Pentafluorophenyl Carbonate, molecular formula is C21H11F5O3, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

Example 9; Synthesis of Compound 16 of Example 1; Acid 12 (46 mg, 0.12 mmol) was dissolved in MeOH (4 mL) and hydrogenated for 20 min. using 20% wt Pd/C. The solution was filtered and the solvent was evaporated in vacuo. The solid residue was dissolved in aqueous acetone (3 mL, 1:1) and treated with 9-fluorenylmethyl pentafluorophenyl carbonate (91 mg, 0.24 mmol) and sodium bicarbonate (31 mg, 0.37 mmol) for 4 hours at room temperature. Water (10 mL) was added and the aqueous layer was extracted with ethyl acetate (6×10 mL). Finally, the solvent was dried (Na2SO4) and concentrated. The crude product was purified by flash column chromatography (methanol:ethyl acteate, 1:1) to afford compound 16 (45 mg, 63%).1H NMR (300 MHz, CD3OD, r.t., TMS): delta=1.43 (s, 9H), 2.98-3.13 (m, 2H, H-6+H-8a), 3.18 (m, 1H, H-7), 3.22-3.44 (m, 2H, H-3, H-5), 3.62-3.80 (m, 2H, H-4, H-8b), 4.23 (t, 1H, J=6.8 Hz), 4.32-4.48 (m, 3H), 7.28-7.87 (m, 8H). 13C NMR (100 MHz, CDCl3, r.t.): delta=28.88, 43.42, 48.54, 56.37, 67.78, 72.04, 73.14, 79.03, 80.38, 80.76, 82.97, 120.94-128.78 (aromatic carbons), 142.61-145.43 (aromatic carbons), 157.71, 159.12, 169.46. MS (ES, [M-H]-); Anal. Calcd for C28H33N2O10: 557.21, Found: 557.09. HRMS (ES, [M-H]-); Anal. Calcd for C28H33N2O10: 557.2135, Found: 581.2133.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 9-Fluorenylmethyl Pentafluorophenyl Carbonate, its application will become more common.

Reference:
Patent; UNIVERSITY OF MANITOBA; US2008/275213; (2008); A1;,
Ester – Wikipedia,
Ester – 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 106685-41-0 as follows. Recommanded Product: 106685-41-0

Example 11; Preparation of 6-[3-(l-adamantyl)-4methoxy phenyl]-2 naphthoic acid (Adapalene) (I): The compound (V) (9.45 g, 22mmol) was dissolved in 1,4-Dioxane (95 ml) at reflux temperature and KOH (6.3 g, 11 mmol in 30 ml water) was added in a drop wise manner for 15 min. The reaction mixture was refluxed for 2-4 hrs and then cooled when the potassium salt of adapalene is precipitated, filtered and washed with methanol (25 ml). This salt of adapalene was acidified with 2 N HCl, solid separated, filtered and dried to obtain crude adapalene. The crude was recrystallized from THF-ethyl acetate. [Yield: 5.0 g, 81 %; Purity: HPLC > 99 %]

According to the analysis of related databases, 106685-41-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; USV LIMITED; WO2007/125542; (2007); A2;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reference of 106685-41-0, 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 106685-41-0 as follows.

A round-bottom flask is loaded with adapalene methyl ester (7 g; 16.41 mmol), THF (42 ml), water (7 ml) and a 50% w/w sodium hydroxide aqueous solution (1.44 g; 18.05 mmol). The mixture is refluxed for 6 hours, then added with water (133 ml) and THF is distilled off to a residual content of approx. 5% w/w, heated to a temperature of about 80C until complete dissolution of the solid, then cooled to 15C. The crystallized product is filtered and dried under vacuum in a static dryer at a temperature of 50C, thereby obtaining adapalene sodium salt (6.7 g; 15.42 mmol) in 94% yield.

According to the analysis of related databases, 106685-41-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Dipharma S.p.A.; Lundbeck Pharmaceuticals Italy S.P.A.; EP1707555; (2006); A1;,
Ester – Wikipedia,
Ester – 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. 538-23-8, name is Propane-1,2,3-triyl trioctanoate, This compound has unique chemical properties. The synthetic route is as follows., Safety of Propane-1,2,3-triyl trioctanoate

A mixture of two types of medium-chain fatty acid triglycerides (C8:0: tricaprilin and C10:0: tricaprin) is commercially available, and it can be used as a reaction material. Thus, this mixed medium-chain triglyceride was prepared at a ratio of 1 : 1 as a reagent. Then, two types of medium-chain fatty acid ester forms were synthesized in hexane from a free astaxanthin. That is to say, 2 mg of a free astaxanthin (manufactured by Sigma), 300 mg of tricaprilin and 300 mg of tricaprin were placed in a brown glass bottle. Twelve ml of n-hexane was added thereto, and three hundred mg of immobilized lipase prepared by the method described in the example of lipase immobilization and 30 muL of water were further added thereto and stirred fully afterwards. Thereafter, while stirring, reaction was carried out at 45C. Three days later, the reaction product was taken out, and the composition ratio of astaxanthin was analyzed by HPLC. As a result, the composition ratio was 81.4% astaxanthin, 9.5% C8 monoester, 9.1% C10 monoester, and less than 1% diester.

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 538-23-8.

Reference:
Patent; SUNTORY LIMITED; EP1500645; (2005); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reference of 538-23-8,Some common heterocyclic compound, 538-23-8, name is Propane-1,2,3-triyl trioctanoate, molecular formula is C27H50O6, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

Two mg of a free astaxanthin (manufactured by Sigma) and 1.3 g of tricaprilin as a triglyceride form fatty acid were placed in a brown glass bottle. Ninety muL of water was added thereto and stirred fully afterwards. Thereafter, 300 mg of the HP1MG resin-immobilized lipase, which was prepared by the method described in the example of lipase immobilization was added thereto, and while shaking (170 rpm), reaction was carried out at 45C. Three days later, the reaction product was taken out, and the composition ratio of astaxanthin was analyzed by HPLC. As a result, the composition ratio was 79.5% astaxanthin, 18.7% monoester, and 1.8% diester

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Propane-1,2,3-triyl trioctanoate, its application will become more common.

Reference:
Patent; SUNTORY LIMITED; EP1500645; (2005); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of 540-10-3, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. 540-10-3, Name is Hexadecyl palmitate, SMILES is CCCCCCCCCCCCCCCC(OCCCCCCCCCCCCCCCC)=O, belongs to esters-buliding-blocks compound. In a article, author is Ostojcic, Marta, introduce new discover of the category.

Production of biodiesel by Burkholderia cepacia lipase as a function of process parameters

Despite the already established route of chemically catalyzed transesterification reaction in biodiesel production, due to some of its shortcomings, biocatalysts such as lipases present a vital alternative. Namely, it was noticed that one of the key shortcomings for the optimization of the enzyme catalyzed biodiesel synthesis process is the information on the lipase activity in the reaction mixture. In addition to making optimization difficult, it also makes it impossible to compare the results of the independent research. This article shows how lipase intended for use in biodiesel synthesis can be easily and accurately characterized and what is the enzyme concentration that enables achievement of the desired level of fatty acid methyl esters (FAME) in the final product mixture. Therefore, this study investigated the effect of two different activity loads of Burkholderia cepacia lipase on the biodiesel synthesis varying the pH and temperature optimal for lipase activity. The optimal lipase pH and temperature were determined by two different enzyme assays: spectrophotometric and titrimetric. The B. cepacia lipase pH optimum differentiated between assays, while the lipase optimally hydrolyzed substrates at 50 degrees C. The analysis of FAME during 24 hr of biodiesel synthesis, at two different enzyme concentrations, pH 7, 8, and 10, and using two different buffers, revealed that the transesterification reaction at optimal pH, 1 hr reaction time and lipase activity load of 250 U per gram of reaction mixture was sufficient to produce more than 99% FAME.

Electric Literature of 540-10-3, 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 540-10-3.

In an article, author is Shen, Peng, once mentioned the application of 540-10-3, Safety of Hexadecyl palmitate, Name is Hexadecyl palmitate, molecular formula is C32H64O2, molecular weight is 480.85, MDL number is MFCD00053739, category is esters-buliding-blocks. Now introduce a scientific discovery about this category.

Straightforward Synthesis of Succinimide-Fused Pyrrolizidines by A Three-Component Reaction of alpha-Diketone, Amino Acid, and Maleimide

An efficient, one-pot, three-component [3+2] cycloaddition reaction of azomethine ylide obtained from alpha-dicarbonyl compounds (cyclic and acyclic diketone or keto ester) and amino acids with maleimides under catalyst-free conditions has been developed. This cascade protocol shows high efficiency and remarkable functional group tolerance, and the ubiquitous succinimide-fused pyrrolizidines with a highly compact and strained scaffold were obtained with high yield and excellent diastereoselectivity. Furthermore, this novel and atom-economical strategy could be performed on a gram scale with comparable reaction efficiency.

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