Month: April 2022

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Redox-Rich Metallocene Tetrazene Complexes: Synthesis, Structure, Electrochemistry, and Catalysis, the main research direction is cobaltocene ferrocene tetrazene cobalt complex preparation electronic structure; electrolysis catalyst proton reduction cobaltocene tetrazene cobalt complex.Formula: C10BrFe.

Thermal or photochem. metal-centered cycloaddition reactions of azidocobaltocenium hexafluorophosphate or azidoferrocene with (cyclooctadiene)(cyclopentadienyl)Co(I) afforded the first metallocenyl-substituted tetrazene cyclopentadienyl cobalt complexes together with azocobaltocenium or azoferrocene as side products. The trimetallic CpCo compounds are highly conjugated, colored and redox-active metallo-aromatic compounds, as shown by their spectroscopic, structural and electrochem. properties. The CpCo-tetrazenido complex with two terminally appended cobaltocene units catalyzes electrochem. proton reduction from acetic acid at a mild overpotential (0.35 V). Replacing cobaltocene with ferrocene moieties rendered the complex inactive toward catalysis.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Preliminary work to the ring syntheses of porphyrins, etc. III. Several pyrrole compounds with amino groups and unsaturated side chains》. Authors are Fischer, H.; Zeile, Karl.The article about the compound:Ethyl 3,5-Dimethyl-2-pyrrolecarboxylatecas:2199-44-2,SMILESS:O=C(C1=C(C)C=C(C)N1)OCC).HPLC of Formula: 2199-44-2. Through the article, more information about this compound (cas:2199-44-2) is conveyed.

cf. C. A. 24, 5302. 2,4-Dimethyl-3-amino-5-carbethoxypyrrole (I) yields an Ac derivative, m. 201° (60% yield). With iso-AmNO2, I gives 90% of the diazonium chloride, decomposes at 173°; it is not completely decomposed by boiling with H2O for 1 hr.; continued boiling, especially with Cu powder, gives 2,4-dimethyl-5-carbethoxypyrrole, m. 125°. Hydrolysis of I with 10% NaOH gives 2,4-dimethyl-3-amino-5 carboxypyrrole (II), which begins to split off CO2 at 75°; Ac derivative, m. 203° (decomposition). 2,4-Dimethyl-3-aminopyrrole, m. 127°, results in about 50% yield by warming the moist II at 75°; Ac derivative, m. 205°. The bromination product of the Ac derivative of I, heated with H2O, gives nearly quant. bis(3-acetylamino-4-methyl-5-carbethoxy-2-dipyrryl)methane, m. 251°, crystallizing in different forms from EtOH, Ac2O and dilute AcOH. With HCO2H and Fe powder, this yields an amorphous 1,4,5,8-tetramethyl-2,3,6,7 tetraacetylaminoporphin. II, HCO2H and HBr, heated 2-3 min., give (2,4-di-methyl-3-aminopyrryl)-2′,4′-dimethyl-3′-aminopyrrolenyl)methene tri-HBr salt, decomps over 280°; from H2O it seps. as violet crystals, from HBr in yellow-red prisms; AcONa gives the mono-HBr salt, dark violet needles, m. 234°. 2,4-Dimethyl-3-(β-carboxy-vinyl)-5-carbethoxypyrrole (III) and NaOH with a little H2O, heated over a free flame for 2 hrs. and then dry-distilled, give dimethylpyrrole and (2,4-dimethylpyrryl)(2′,4′-dimethylpyrrolenyl)methene. MeNO2 adds to 2,4-dimethyl-3-(β-nitrovinyl)-5-carbethoxypyrrole, giving the compound C12H17O6N3, m. 180°. 2,4-Dimethyl-3-(β-dicyano-vinyl)-5-carbethoxypyrrole (IV) and Br give a perbromide, golden yellow, decomposed by H2O to a 2-bromomethyl derivative, m. 258°. IV, MeOH and Br give the 2-carbomethoxy derivative, m. 187°; saponification with 0.1 N NaOH by heating 12 hrs. at 85° gives 2.5-dicarboxy-3-formyl-4-methylpyrrole, does not m. 360°; the di-Me ester m. 180° (oxime, m. 221°; semicarbazone, m. 247°). IV and SO2Cl2 in Et2O, followed by hydrolysis with H2O, give the 2-carboxy derivative, does not m. 360°; similarly III gives the 2-carboxy derivative, m. 241°; the free acid has no m. p. The Me ester of III m. 150°. 2,4-Dimethyl-3-formyl-5-carbethoxypyrrole and SO2Cl2 give the 2-carboxy-3-chloro derivative, m. 260°. 2,4-Di-methyl-3,5-diformylpyrrole (V) and 2,4-dimethyl-3-acetylpyrrole with HBr-EtOH give (2,4-dimethyl-3-formylpyrryl)(2′,4′-dimethyl-3′-acetylpyrrolenyl)methene, m. 210°. V and cryptopyrrole give with HBr 5,5′,3,3′-tetramethyl-4-ethyl-4′-formylpyrromethene-HBr, thick prisms. 2,4-Dimethyl-5-carbethoxy-3-thioformylpyrrole, for which a method of preparation is given, gives with SO2Cl2 and H2O 4-methyl-3-formyl-2-carbethoxy-5-carboxylic acid-pyrrole, m. 169°; phenylhydrazone, yellow, m. 235°.

There are many compounds similar to this compound(2199-44-2)HPLC of Formula: 2199-44-2. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (R)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole( cas:1428537-19-2 ) is researched.COA of Formula: C13H15F3N2O.Khan, Ismat Ullah; Kattela, Shivashankar; Hassan, Abbas; Correia, Carlos Roque Duarte published the article 《Enantioselective total synthesis of the highly selective sphingosine-1-receptor VPC01091 by the Heck desymmetrization of a non-activated cyclopentene-fused spiro-pyrrolidinone》 about this compound( cas:1428537-19-2 ) in Organic & Biomolecular Chemistry. Keywords: stereoselective Heck Matsuda desymmetrization cyclopentene fused spiropyrrolidinone arenediazonium tetrafluoroborate; enantioselective total synthesis VPC01091. Let’s learn more about this compound (cas:1428537-19-2).

A novel, efficient and enantioselective Heck-Matsuda desymmetrization of non-activated cyclopentene-fused spiro-pyrrolidinones was developed. The reaction provided the Heck products in good to excellent yields and selectivities and tolerated a variety of functional groups in arenediazonium tetrafluoroborates (12 examples) with respect to its electronics and substitution patterns. This methodol. was successfully applied in the concise enantioselective total synthesis of VPC01091 (I), a drug candidate for the treatment of multiple sclerosis.

There are many compounds similar to this compound(1428537-19-2)COA of Formula: C13H15F3N2O. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Product Details of 114527-53-6. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,2,3,4-Tetrahydroquinoline-3-carboxylic acid, is researched, Molecular C10H11NO2, CAS is 114527-53-6, about Catalytic Hydrogenation of Substituted Quinolines on Co-Graphene Composites. Author is Asaula, Vitalii M.; Buryanov, Volodymyr V.; Solod, Bohdan Y.; Tryus, Daryna M.; Pariiska, Olena O.; Kotenko, Igor E.; Volovenko, Yulian M.; Volochnyuk, Dmitriy M.; Ryabukhin, Sergey V.; Kolotilov, Sergey V..

A set of 20 composites was prepared by pyrolysis of Co2+ complexes with 1,10-phenanthroline, melamine and 1,2-diaminobenzene. These composites were tested as the catalysts for the hydrogenation of quinolines. As shown by powder X-ray diffraction and TEM, the composites contained Co particles of several dozen nm sizes. The composition (elements content), Raman spectra X-ray photoelectron spectra parameters of the composites were analyzed. It was found that there was no distinct factor that controlled the yield of 1,2,3,4-tetrahydroquinolines in the investigated process. The yields of the resp. products were in the range 90-100%. The three most active composites were selected for scale-up and hydrogenation of a series of substituted quinolines. Up to 97% yield of 1,2,3,4-tetrahydroquinoline was obtained on a 50 g scale. Five representative substituted quinolines were synthesized on a 10-20 g scale using the Co-containing composites as the catalysts.

There are many compounds similar to this compound(114527-53-6)Product Details of 114527-53-6. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Ferrocenylboronic and 1,1′-ferrocenylenediboronic acids and their reactions》. Authors are Nesmeyanov, A. N.; Sazonova, V. A.; Drozd, V. N..The article about the compound:Bromoferrocenecas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25).SDS of cas: 1273-73-0. Through the article, more information about this compound (cas:1273-73-0) is conveyed.

The reactions were run under N. To 92 g. (BuO)3B in Et2O was added with Dry Ice cooling an ethereal solution of ferrocenyl-Li prepared from 17.6 g. ferrocene by treatment with BuLli (from 39 g. BuCl and 7.6 g. Li). The mixture was allowed to come to room temperature; on the following day it was treated with aqueous H2SO4 and the organic layer extracted with aqueous KOH. The alk. extracts on acidification gave first 2.9 g. 1,1′-ferrocenylenediboronic acid (I) (total yield 13%), decomposing at 180°, then ferrocenylboronic acid (II), 26% yield, m. 1438°. The latter refluxed with aqueous ZnCl2 gave ferrocene; the diboronic acid is hydrolyzed similarly. Treatment of II with hot aqueous acetone solution of HgCl2 gave 76% yellow ferrocenylmercuric chloride, decompose 192-4° (from xylene). Similarly aqueous CuCl2 gave 84% chloroferrocene, m. 59-60° (from EtOH). CuBr2 gave 80% bromoferrocene, m. 32-3°. I and aqueous CuCl2 gave 1,1′-dichloroferrocene, m. 75-7° (from EtOH); CuBr2 gave 76% 1,1′-dibromoferrocene, m. 50-1° (from EtOH). Treatment of II with ammoniacal solution of Ag2O gave metallic Ag, and extraction with Et2O gave 52% diferrocenyl, decomposing 230°, along with 31% ferrocene. Diferrocenyl is sparingly soluble in petr. ether, soluble in MePh, C6H6, dioxane, and tetrahydrofuran.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Isolation and characterization of a novel tetrahydro-[2,2′]bipyrrolyl dimer as an impurity from a Knorr reaction, published in 2004-10-31, which mentions a compound: 2199-44-2, mainly applied to malonate pentanedione nitrite Knorr reaction; pyrrole preparation; bipyrrole preparation, Computed Properties of C9H13NO2.

A dimer, tetra-Et 2,2′,3,3′-tetramethyl-1,1′,2,2′-tetrahydro-4H,4’H-2,2′-bipyrrolyl-5,5,5′,5′-tetracarboxylate (I), has been isolated as an impurity from a Knorr reaction for the synthesis of Et 3,5-dimethylpyrrole-2-carboxylate from 2,4-pentanedione and di-Et oximinomalonate in a dissolving zinc reduction The solid-state structure of I was determined by X-ray crystallog. Knorr reactions typically rely upon the requisite pyrrole being the only water-insoluble crystalline material present in the reaction mixture, and so work-up and purification procedures for Knorr reactions should be monitored carefully given the water-insolubility of this dimer.

There are many compounds similar to this compound(2199-44-2)Computed Properties of C9H13NO2. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Product Details of 1273-73-0. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Assignment of 1H NMR chemical shifts in 1,2- and 1,1′-disubstituted ferrocenes. Author is Pickett, Tom E.; Richards, Christopher J..

The effect of 29 commonly encountered substituents on the chem. shifts of α, β and C5H5 positions in monosubstituted ferrocenes are tabulated and employed for determining 1H NMR assignments in 1,2- and 1,1′-disubstituted ferrocene derivatives

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Quinolinium thiocyanate》. Authors are Hurd, Charles D.; Wehrmeister, H. L..The article about the compound:quinoliniumhydrogensulphatecas:530-66-5,SMILESS:[O-]S(=O)(O)=O.C12=CC=C[NH+]=C1C=CC=C2).Quality Control of quinoliniumhydrogensulphate. Through the article, more information about this compound (cas:530-66-5) is conveyed.

The reaction of BzCl with quinoline (I) and CHNa(CO2Et)2 did not yield the desired 1,2-dihydroquinoline, since most of the I was recovered; the products (as determined by hydrolysis) are CHBz(CO2Et)2 and Bz(BzO)C:C(CO2Et)2. I (63 g.) and 156 g. KSCN in 600 ml. H2O, treated (7 min.) with 148 g. BzCl and stirred 1 hr., give 77% quinolinium thiocyanate, light yellow, m. 141-1.5°; FeCl3 gives a deep red color; heated 1 hr. on the steam bath with concentrated HCl it yields quinolinium H sulfate, m. 162-4°.

There are many compounds similar to this compound(530-66-5)Quality Control of quinoliniumhydrogensulphate. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

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: 1273-73-0, is researched, Molecular C10BrFe, about Oxidative purification of halogenated ferrocenes, the main research direction is halogenated ferrocene preparation oxidative purification.Name: Bromoferrocene.

Authors report the large scale syntheses and oxidative purification’ of fcI2, fcBr2 and FcBr (fc = ferrocene-1,1′-diyl, Fc = ferrocenyl). These valuable starting materials are typically laborious to sep. via conventional techniques, but can be readily isolated by taking advantage of their increased E1/2 relative to FcH/FcX contaminants. The work extends this methodol. towards a generic tool for the separation of redox active mixtures

There are many compounds similar to this compound(1273-73-0)Name: Bromoferrocene. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

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: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Ring opening of ferrocenyl-substituted cyclopropanes.COA of Formula: C10BrFe.

Treating a mixture of isomeric ferrocenyl-substituted cyclopropanes I (R = Fc throughout this abstract) with excess Ph3CBF4 in CH2Cl2 gave a 2:1 mixture of endo and exo isomers of diferrocenyl-substituted cyclohexene II, formed by cyclodimerization of the initially formed butadiene. Cleavage of 3-methyl-3-ferrocenylcyclopropene with CF3CO2H followed by trapping with excess Me2NPh gave a mixture of E- and Z-4-Me2NC6H4CH2CH:CRMe. A mechanism involving ferrocenyl-stabilized carbocation formation is proposed.

There are many compounds similar to this compound(1273-73-0)COA of Formula: C10BrFe. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com