Tag: M.W:200-300

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 52287-51-1, is researched, SMILESS is BrC1=CC=C2OCCOC2=C1, Molecular C8H7BrO2Journal, Polish Journal of Chemistry called Synthesis of 6,7-(ethylenedioxy)-2,2-dimethyl-3-chromene, Author is Biernacki, Wladyslaw; Sobotka, Wieslaw, the main research direction is ethylenedioxychromene; pyranobenzodioxanone.Product Details of 52287-51-1.

The title compound (I) was prepared from o-(HO)2C6H4 in 7 steps. Thus, o-(HO)2C6H4 was treated with ClCH2CH2Cl to give II (R = H) which was brominated. Grignard reaction of II (R = Br) with BzO2CMe3 gave II (R = OCMe3) which was dealkylated to II (R = OH) at 145°. II (R = OH) was treated with Me2C:CHCO2H to give the ketone III. III was reduced to alc. and dehydrated with POCl3 to give I.

《Synthesis of 6,7-(ethylenedioxy)-2,2-dimethyl-3-chromene》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine)Product Details of 52287-51-1.

Reference:
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Pyrazoles – an overview | ScienceDirect Topics

Wang, Cheng; Xu, Hui; Gao, Fei; Zhang, Yangping; Song, Tongxin; Wang, Caiqin; Shang, Hongyuan; Zhu, Xing; Du, Yukou published an article about the compound: Tin(II) oxalate( cas:814-94-8,SMILESS:O=C([O-])C([O-])=O.[Sn+2] ).Application In Synthesis of Tin(II) oxalate. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:814-94-8) through the article.

Developing cost-effective catalysts with superb activity and stability to alc. electro-oxidation is a decisive factor toward the progress of direct alc. fuel cells (DAFCs). Rationally utilizing the architectural and surface microstructural sensitivity of nanocatalysts can significantly increase their electrocatalytic properties. Here, we report an appropriate route that allows the fabrication of ultrafine PtFeSn nanowires (NWs) with tunable compositions Interestingly, the addition of Sn reconstructed the surface microstructures, making ultrafine 1D NWs rich in a large number of surface protuberances, which may facilitate the oxidation of ethanol and methanol. Impressively, further catalytic studies demonstrate that all the PtFeSn NWs exhibit excellent catalytic capabilities for ethanol oxidation reaction (EOR) and methanol oxidation reaction (MOR), and display composition-related electrocatalytic activity with Pt1Fe0.20Sn0.46 NWs, possessing the highest activity for EOR and MOR. In addition, the trimetallic PtFeSn NWs exhibit significant meliorative durability relative to PtFe NWs and com. Pt/C. The superb electrocatalytic performance is ascribed to its one-dimensional (1D) structure, at.-level fine diameter, synergistic effect among Pt, Fe, and Sn components and abundant protuberances on the surface. Thus, this study highlights the significance of accurate structure- and surface-controlled Pt-based NWs for electrocatalysis and provides a universal approach for designing multi-component catalysts.

《High-density surface protuberances endow ternary PtFeSn nanowires with high catalytic performance for efficient alcohol electro-oxidation》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(Tin(II) oxalate)Application In Synthesis of Tin(II) oxalate.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Product Details of 52287-51-1. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about gem-Difluoroallylation of Aryl Halides and Pseudo Halides with Difluoroallylboron Reagents in High Regioselectivity. Author is Sakamoto, Shu; Butcher, Trevor W.; Yang, Jonathan L.; Hartwig, John F..

The palladium-catalyzed gem-difluoroallylation of aryl halides and pseudo halides Arx (X = Br, Cl, I, OTf; Ar = Ph, 4-tertbutylphenyl, 2,3-dihydro-1,4-benzodioxin-6-yl, etc.) and 4,4′-dibromo-2,2′-bithiophene with 3,3-difluoroallyl boronates F2C=C(R)CH(R1)BPin (R = H, nonyl, Ph, 1-benzofuran-2-yl, etc.; R1 = H, (benzyloxy)methyl) in high yield with high regioselectivity, and the preparation of the 3,3-difluoroallyl boronate reactants by a copper-catalyzed defluorinative borylation of inexpensive gaseous 3,3,3-trifluoropropene with bis(pinacolato)diboron were reported. The gem-difluoroallylation of aryl and heteroaryl bromides proceeds with low catalyst loading (0.1 mol% [Pd]) and tolerates a wide range of functional groups, including primary alcs., secondary amines, ethers, ketones, esters, amides, aldehydes, nitriles, halides, and nitro groups. This protocol extends to aryl iodides, chlorides, and triflates, as well as substituted difluoroallyl boronates, providing a versatile synthesis of gem-difluoroallyl arenes ArC(F2)C(R)=CHR1 that to be valuable intermediates to a series of fluorinated building blocks.

Different reactions of this compound(6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine)Product Details of 52287-51-1 require different conditions, so the reaction conditions are very important.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Lin, Zhijie; Liang, Yucang; Zeng, Yiming; Chen, Xuan; Liu, Manmen; Dai, Pinqing; Chen, Jialin; Sun, Xudong researched the compound: Tin(II) oxalate( cas:814-94-8 ).COA of Formula: C2O4Sn.They published the article 《Morphology-tunable synthesis and formation mechanism of SnO2 particles and their application in Ag-SnO2 electrical contact materials》 about this compound( cas:814-94-8 ) in Ceramics International. Keywords: silver tin oxide elec contact material nanoparticle morphol. We’ll tell you more about this compound (cas:814-94-8).

SnO2 powders with four distinct morphologies of prismoids, hollow rhomboidal tubes, solid rhomboidal rods, and needles have been prepared through morphol.-conserved transformation from SnC2O4 precursors. The SnC2O4 precursors were synthesized by a facile oxalate precipitation method. A controllable periodic bond chain (PBC) growth was found to be critical for the formation of these SnC2O4 samples. In the case of forward titration, SnC2O4 prismoids were generated because the formed Sn3O(OH)2SO4 was attached on {1 01} polar facets and inhibited the PBC growth along the c axis. By contrast, in the case of reverse titration, SnC2O4 samples preferably formed one-dimensional shapes. Dissolution and ripening were observed during the formation of hollow tubes in the case of low molar ratio of Sn2+ to C2O2-4. Further, the formation of SnC2O4 needles was ascribed to the selective coordination of polyvinylpyrrolidone (PVP) on the side surface. The as-prepared SnO2 powders were used as reinforcement of Ag-SnO2 elec. contact materials, and a good adhesion was observed at the Ag (111)/SnO2 (200) interface. Further, the characterization results revealed that the sample reinforced by SnO2 tubes (with one-dimensional shape and hollow structure) had the lowest degradation rate under cathode arc erosion, which might be attributed to its good resistance to the dual action (heat and force) of cathode arc.

Different reactions of this compound(Tin(II) oxalate)COA of Formula: C2O4Sn require different conditions, so the reaction conditions are very important.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Shape- and size-dependent desorption kinetics and surface acidity of nano-SnO2, published in 2022, which mentions a compound: 814-94-8, Name is Tin(II) oxalate, Molecular C2O4Sn, Formula: C2O4Sn.

The desorption kinetic parameters (the desorption activation energy (Ed) and the desorption pre-exponential factor (A)) and the surface acidity (the strength and number of acid sites) of spherical and octahedral nano-SnO2 with different particle sizes for NH3 were measured by a temperature-programmed desorption method. Afterwards, the shape and size dependence of the desorption kinetic parameters and surface acidity of nano-SnO2 were discussed. The results show that shape and size have significant influences on the desorption kinetics and surface acidity of nano-SnO2. For the desorption on spherical or octahedral nano-SnO2, Ed, ln A, and the strength and number of acid sites increase with decreasing particle size. When the diameter is larger than 20 nm, Ed, ln A, and the number of surface acid sites are linearly related to the reciprocal of the particle size, resp. For different shapes of nano-SnO2 with the same equivalent diameter, the desorption kinetic parameters of octahedral nanoparticles are larger than those of spherical ones, i.e., Edoctahedron > Ed sphere and ln A octahedron > ln A sphere. The influence mechanism of shape and size on the desorption kinetic parameters of nano-SnO2 can be attributed to the influence of shape and particle size on the surface acidity of nano-SnO2.

Different reactions of this compound(Tin(II) oxalate)Formula: C2O4Sn require different conditions, so the reaction conditions are very important.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

COA of Formula: C8H7BrO2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Facile and economical electrochemical dehalogenative deuteration of (hetero)aryl halides. Author is Lu, Lijun; Li, Hao; Zheng, Yifan; Bu, Faxiang; Lei, Aiwen.

A practical deuteration of (hetero)aryl halides through an electrochem. reduction method was introduced. This transformation proceeded smoothly at room temperature without metal catalysts, external reductants, or toxic or dangerous reagents. Remarkably, low-cost and chem. equivalent D2O was the sole deuterium source in this reaction. Professional electrosynthesis equipment was not essential because common batteries and electrodes were enough for this reaction.

Different reactions of this compound(6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine)COA of Formula: C8H7BrO2 require different conditions, so the reaction conditions are very important.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine( cas:52287-51-1 ) is researched.Quality Control of 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine.Jia, Kunfang; Zhang, Fuyuan; Huang, Hanchu; Chen, Yiyun published the article 《Visible-Light-Induced Alkoxyl Radical Generation Enables Selective C(sp3)-C(sp3) Bond Cleavage and Functionalizations》 about this compound( cas:52287-51-1 ) in Journal of the American Chemical Society. Keywords: visible light alkoxy radical bond cleavage functionalization; alc oxidation cyclic iodine reagent; beta fragmentation bond cleavage alkynylation alkenylation cycloalkanol. Let’s learn more about this compound (cas:52287-51-1).

The alkoxyl radical is an important reactive intermediate in mechanistic studies and organic synthesis; however, its current generation from alc. oxidation heavily relies on transition metal activation under strong oxidative conditions. Here we report the first visible light-induced alc. oxidation to generate alkoxyl radicals by cyclic iodine(III) reagent catalysis under mild reaction conditions. The β-fragmentation of alkoxyl radicals enables selective C(sp3)-C(sp3) bond cleavage and alkynylation/alkenylation reactions with various strained cycloalkanols, and for the first time with linear alcs.

Different reactions of this compound(6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine)Quality Control of 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine require different conditions, so the reaction conditions are very important.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Computed Properties of C13H23NO4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-tert-Butyl 2-ethyl piperidine-1,2-dicarboxylate, is researched, Molecular C13H23NO4, CAS is 362703-48-8, about New short and general synthesis of three key Maillard flavour compounds: 2-Acetyl-1-pyrroline, 6-acetyl-1,2,3,4-tetrahydropyridine and 5-acetyl-2,3-dihydro-4H-1,4-thiazine. Author is Deblander, Jurgen; Van Aeken, Sam; Adams, An; De Kimpe, Norbert; Abbaspour Tehrani, Kourosch.

A general synthetic route was developed to obtain 3 key Maillard flavor compounds, namely 2-acetyl-1-pyrroline, 6-acetyl-1,2,3,4-tetrahydropyridine, and 5-acetyl-2,3-dihydro-4H-1,4-thiazine. The key step in the process is the methylenation reaction of azaheterocyclic carboxylic esters by dimethyltitanocene, giving rise to intermediate vinyl ethers which can be considered stable precursors for the title compounds Simple acidic treatment of these precursors can release the characteristic Maillard flavor compounds

After consulting a lot of data, we found that this compound(362703-48-8)Computed Properties of C13H23NO4 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemistry – An Asian Journal called Sequential SNAr Reaction/Suzuki-Miyaura Coupling/C-H Direct Arylations Approach for the Rapid Synthesis of Tetraaryl-Substituted Pyrazoles, Author is Morita, Taiki; Kobayashi, Daisuke; Matsumura, Keisuke; Johmoto, Kohei; Uekusa, Hidehiro; Fuse, Shinichiro; Takahashi, Takashi, which mentions a compound: 52287-51-1, SMILESS is BrC1=CC=C2OCCOC2=C1, Molecular C8H7BrO2, Category: pyrazoles-derivatives.

The rapid synthesis of 1,3,4,5-tetraaryl-substituted pyrazoles I (R1 = CN, NO2; R2 = 4-CF3, 4-MeO, 2-Me; R3 = CN, Me, CO2Et; R4 = 4-O2NC6H4, naphthalen-2-yl, 2,3-dihydro-1,4-benzodioxin-6-yl, etc.) was achieved through a sequence of SNAr reaction/Suzuki-Miyaura coupling/Pd-catalyzed direct arylations that used 3-iodo-1H-pyrazole as a scaffold. Compounds I were synthesized in a straightforward manner with no extra synthetic steps, such as protection/deprotection or the introduction of activating/directing groups, using readily available substrates and reagents. The developed synthetic approach enabled the structurally diverse synthesis of multiaryl-substituted pyrazoles without using glovebox techniques.

The article 《Sequential SNAr Reaction/Suzuki-Miyaura Coupling/C-H Direct Arylations Approach for the Rapid Synthesis of Tetraaryl-Substituted Pyrazoles》 also mentions many details about this compound(52287-51-1)Category: pyrazoles-derivatives, you can pay attention to it or contacet with the author([email protected]; [email protected]) to get more information.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Palladium-catalyzed direct reductive cross-coupling of aryltrimethylammonium salts with aryl bromides, published in 2021, which mentions a compound: 52287-51-1, Name is 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, Molecular C8H7BrO2, Related Products of 52287-51-1.

An efficient palladium-catalyzed direct reductive cross-coupling of aryltrimethylammonium salts with aryl bromides was developed. The reactions proceeded smoothly in the presence of a palladium catalyst, magnesium turnings, LiCl, and TMEDA in THF at room temperature, leading to the corresponding biaryl compounds in moderate to good yields with reasonable functional group tolerance. The one-pot reaction using cheap and readily available aryl bromide as a coupling partner were simple to handle, thereby avoiding the use of pre-prepared organometallic reagents.

The article 《Palladium-catalyzed direct reductive cross-coupling of aryltrimethylammonium salts with aryl bromides》 also mentions many details about this compound(52287-51-1)Related Products of 52287-51-1, you can pay attention to it, because details determine success or failure

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics