Day: April 12, 2022

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Camphane derivatives. VII. Syntheses and structure of 3-methyl-3aβ,7aβ-bornano[3,2-d]oxazolidin-2-one and its derivatives》. Authors are Hamashima, Yoshio; Tori, Kazuo; Takamizawa, Akira.The article about the compound:(1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acidcas:560-09-8,SMILESS:CC1(C)[C@@H](CC[C@]1(C)C(O)=O)C(O)=O).Recommanded Product: 560-09-8. Through the article, more information about this compound (cas:560-09-8) is conveyed.

cf. CA 62, 4055b. In connection with the elucidation of the structure of I and II, obtained by the reaction of 3α-methylaminocamphor (III) with COCl2, 3-methyl-3aβ,7aβ-(IV) and 3aα,7α-bornano[3,2-d]oxazolidin-2-one (V) and their derivatives were synthesized and studied stereochem. Their N.M.R. spectra were also investigated (tabulated and discussed). Excess COCl2 in C6H6 added dropwise with stirring to a boiling suspension of 10 g. III.HCl in dry C6H6 until dissolution gave 7 g. VI, m. 82° (Et2O-hexane), [α]25D 142° (CHCl3), showing a pos. Cotton effect on optical rotatory dispersion (ORD), 0.36 g. II, m. 193° (MeOH-Et2O), [α]25D 127.7° (CHCl3), showing a pos. Cotton effect on ORD, and 0.3 g. unchanged III.HCl. The resinous oil obtained on concentration redissolved in C6H6, the solution washed with 10% aqueous Na2CO3, dried, and concentrated, the oily residue kept several days (HCl evolved), the resulting solid extracted with Et2O, and the Et2O-soluble fraction washed with dilute aqueous Na2CO3, chromatographed on neutral Al2O3, and eluted with Et2O gave 5 g. I, m. 82° (Et2O-hexane), [α]25D -22° (CHCl3), showing a neg. plain curve on ORD; the product eluted with MeOH and the Et2O-insoluble solid combined and recrystallized from MeOH gave 0.40 g. II. VI (0.2 g.) refluxed 2 hrs. with 5 ml. 25% MeOH-HCl gave 0.092 g. I and 0.046 g. VII, m. 122°. VI(0.5 g.) refluxed 5 hrs. with 3 ml. SOCl2 gave 0.35 g. I, m. 82°. (VII,R=Me); (IX,R=Et); (X,R=Ac); (XI,R=Bz); A suspension of I in 4 ml. 2% HCl heated 30 min. at 80° on a steam bath until CO2 evolution ceased and the resulting solution concentrated to dryness gave 15 mg. III.HCl, m. 238° (decomposition). ClCO2Me (1 mole) added dropwise to 2 moles III in Et2O with stirring and ice cooling and the mixture stirred 1 hr. at room temperature, gave VIII, b1, 130-40°, m. 53-4°. A mixture of 100 mg. I and 200 mg. KOH in 10 ml. MeOH refluxed 10 hrs. gave VIII, b1 135°, m. 50°. I (480 mg.) in 5 ml. MeOH containing 500 mg. Na heated 30 min. at 70° gave 400 mg. VIII, b1, 130-40°. I (1 g.) in 15 ml. 30% MeOH-HCl refluxed 10 hrs. gave 0.6 g. VII, m. 122°. I (1 mole) in C5H5N heated 2 hrs. at 70° with 1.2 moles AgNO3 in MeOH also gave VII, m. 122°. I (1 g.) refluxed with 25% EtOH-HCl and worked up like VII gave 0.9 g. IX, b0.07 145°. Both VII and IX were easily hydrolyzed to III by concentrated HCl. A mixture of 2.44 g. I and 2 g. AgOAc in AcOH refluxed 8 hrs. gave 2.1 g. X, m. 107° (hexane), showing a plain neg. curve on ORD. I (240 g.) mixed with 230 mg. AgOBz and 2 g. BzOH, and the mixture heated 10 hrs. at 150-60° and cooled, and the product isolated by extraction with C6H6 gave 200 mg. XI, m. 153-4°, [α]23D -47.2° (CHCl3). Acid hydrolysis of both X and XI led to III, no other products or intermediates being obtained. I (100 mg.) in 10 ml. MeOH containing 200 mg. KOH hydrogenated over 100 mg. 10% Pd-C at room temperature and atm. pressure with stirring (9 ml. H absorbed during 1 hr.) gave 60 mg. IV, m. 119° (Et2O), [α]28D 108.2° (CHCl3), showing a pos. plain curve on ORD. IV was also obtained in fairly good yield by hydrogenation with Raney Ni in alk. medium. 3α-Aminoborneol (XII) (300 mg.) and 3 ml. 98% HCO2H heated 6 hrs. at 110° gave 150 mg. XIII, m. 143° (EtOH). XII (100 mg.) and 100 mg. HCONH2 heated 10 min. at 120° gave 100 mg. XIII, m. 143°. (XII,R=H); (XIII,R=CHO); (XIV,R=Me); (XVIII,R=Cl); (XIX,R=OH); (XXII,R=OAc); (XXIII,R=OMe); XIII (300 mg.) in tetrahydrofuran (THF) added dropwise to 200 mg. LiAlF4 in THF with ice water cooling and the mixture refluxed and stirred 4 hrs. gave 200 mg. XIV, m. 85-6° (hexane). III (3 g.) in Et2O added to 300 mg. LiAlH4 in Et2O and the mixture stirred 2 hrs. at room temperature gave 1.0 g. XIV, m. 85° (hexane). To a mixture of 500 mg. XIV, 10 ml. C6H6, and 10 ml. 10% aqueous Na2CO3 was added 20% C6H6COCl2 with stirring until the organic layer became clear (the mixture was kept alk. throughout the reaction) gave 510 mg. IV, m. 119° (Et2O), [α]26D 108° (CHCl3), IV (10 mg.) refluxed 6 hrs. with 2 ml. MeOH containing 200 mg. KOH gave 6 mg. XIV, m. 80-2°. XIV (200 mg.) and 2 ml. CS2 in 15 ml. EtOH refluxed until no more H2S was evolved (15 hrs.) (during the reaction addnl. CS2 was added) gave 120 mg. XV, m. 206° (MeOH). A suspension of 120 mg. XV and 500 mg. Raney Ni (WII) in EtOH stirred 3 hrs. at room temperature and kept overnight gave 50 mg. XIV, m. 80-2°. To 100 mg. XV in 1 ml. AcOH was added dropwise 35% H2O2 until no more turbidity occurred and the mixture let stand 2 hrs. at room temperature to give IV, m. 119°. 3α-Aminoisoborneol (200 mg.) and 1 ml. 98% HCO2H refluxed 5 hrs. gave 150 mg. 3α-formamido analog, m. 162° (Me2CO-Et2O), which (480 mg.) reduced with LiAlH4 in Et2O gave 300 mg. 3α-methylaminoisoborneol (XVI), m. 66-7° (Et2O-hexane) (HCl salt m. >310°). II (70 mg.) treated with 2 ml. C5H5N and 1 ml. Ac2O under ice water cooling and the solution kept ∼1 week at room temperature gave 60 mg. XVII, m. 120.5° (Et2O), [α]30D 150.3°, showing a pos. plain curve on ORD. XVII on hydrolysis with NaOH or HCl gave II. II(100 mg.) and 2 ml. SOCl2 refluxed 20 hrs. until gas evolution ceased gave 100 mg. XVIII, m. 132° (Et2O-hexane), [α]28D -21.5° (CHCl3), showing a pos. plain curve on ORD. II (100 mg.) and 500 mg. PCl5 in 2 ml. POCl3 refluxed 20 hrs. gave 80 mg. XVIII, m. 130-1°. XVIII (400 mg.) suspended in 10 ml. 10% HCl heated 15 hrs. at 100° gave quant. XIX, m. 254° (decomposition) (MeOH-Et2O), [α]24D 13.3° (CHCl3), showing a pos. plain curve on ORD. XVIII (260 mg.) in 10 ml. MeOH containing 620 mg. KOH heated 4 hrs. at 75° and kept overnight at room temperature gave 100 mg. camphor-quinone (XX), m. 190-5°, and 100 mg. XIX. XIX (130 mg.) in 3 ml. absolute MeOH containing 200 mg. Na kept 1 week at room temperature gave 40 mg. D-camphoric acid (XXI), m. 187° (Et2O-hexane), [α]25D 46.1° (EtOH), and a small amount XX. XXI (10 mg.) heated 4 hrs. at 140° with 10 mg. ZnCl2 and 500 mg. Ac2O gave 3 mg. camphoric anhydride, m. 220°. XIX (50 mg.) in 10 ml. MeOH containing 50 mg. KOH hydrogenated over 100 mg. Raney Ni at room temperature and atm. pressure with stirring (6 ml. H absorbed, during 1 hr.) gave 37 mg. II, m. 188-90°. Zn (600 mg.) added to 130 mg. XIX in 6 ml. AcOH at 100° with stirring, after 2 hrs. 600 mg. Zn added, and the mixture heated and stirred 2 hrs. gave 20 mg. unchanged XIX, and 45 mg. II, m. 190-2°. XVIII (40 mg.), 60 mg. AgOAc; and 1 ml. C5H5N in 1 ml. AcOH heated 3 hrs. at 100° gave 25 mg. XXII, m. 84-5° (Et2O-hexane), [α]22D 67.2° (CHCl3), showing a pos. plain curve on ORD. To 50 mg. XIX in 5 ml. C5H5N was added 1 ml. Ac2O with cooling and the solution kept 1 week at room temperature to give 50 mg. XXII, m. 84° (Et2O-hexane). Treatment of either XVIII or XIX with excess AgOAc in C5H5N gave XXII. XXII (20 mg.) heated 4 hrs. on a steam bath with 2 ml. 10% HCl gave XIX, m. 254° (decomposition) (Et2O). XIX (50 mg.) and 2 ml. SOCl2 refluxed 20 hrs. gave XVIII, m. 132° (Et2O-hexane). A mixture of 40 mg. XVIII, 60 mg. AgNO3; 2 ml. C5H5N, and 2 ml. MeOH heated 1.5 hrs. on a steam bath until no further precipitation of solid occurred gave XXIII, b0.05 110-20°, m. 76-8° (hexane), showing a small pos. plain curve on ORD. XVIII (20 mg.) in 2 ml. 25% MeOH-HCl heated 5 hrs. gave 12 mg. XXIII, b0.05 115°. XXIII (50 mg.) in MeOH hydrogenated over 100 mg. Raney Ni at room temperature and atm. pressure (1 mol. equivalent H was absorbed) gave XXIV, b0.15 120-30°, m. 48-50°. To 260 mg. XIX in AcOD (prepared from 10 ml. Ac2O and 3 ml. D2O) was added 1 g. Zn at 110° with stirring, after 1.5 hrs. 1.5 g. Zn added, and the mixture heated 4.5 hrs. to give XXV, m. 192-3°. XVIII (100 mg.) in 10 ml. MeOH containing 200 mg. KOH hydrogenated over 100 mg. 10% Pd-C at room temperature and atm. pressure (2 mol. equivalents H absorbed in 15 min.) gave 60 mg. IV, m. 119° (Et2O-hexane), and 13 mg. XIV, m. 84-5°. XVIII (55 mg.) in 10 ml. MeOH containing 100 mg. KOH hydrogenated over 200 mg. Raney Ni at room temperature and atm. pressure (2 mot. equivalents H absorbed in 15 min.) gave 28 mg. V, m. 123° (Et2O), [α]27D -33.3° (CHCl3), showing a neg. plain curve on ORD. The N.M.R. spectral evidence confirmed the assignment of the configurations of most of the compounds prepared Pertinent ir data were given and the N.M.R. spectra of IV and V recorded.

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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: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Spontaneous Resolution to Absolute Chiral Induction: Pseudo-Kagome Type Homochiral Zn(II)/Co(II) Coordination Polymers with Achiral Precursors.Application In Synthesis of (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid.

Conglomerate crystallization of achiral precursors yielding racemate metal organic frameworks/coordination polymers (MOFs/CPs) can be driven to absolute homochiral crystallization of the desired enantiomorph by using a suitable chiral induction agent. In crystallization experiments isostructural Zn and Co homochiral CPs (1P, 1M and 2P, 2M) were prepared using the achiral precursors. In the presence of enantiopure camphoric acid, the crystallization process prefers absolute chiral induction over conglomerate formation which is established by single crystal x-ray diffraction and CD spectroscopy. Crystallog. data are given.

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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.Burri, Kaspar F. researched the compound: 2-(tert-Butyl)isothiazol-3(2H)-one 1,1-dioxide( cas:119639-24-6 ).Recommanded Product: 2-(tert-Butyl)isothiazol-3(2H)-one 1,1-dioxide.They published the article 《Tilcotil studies. Part 2. [4 + 2] Additions with isothiazol-3(2H)-one 1,1-dioxide》 about this compound( cas:119639-24-6 ) in Helvetica Chimica Acta. Keywords: bromosiothiazole dioxide Diels Alder siloxybutadiene; oxazole isothiazolone dioxide Diels Alder; saccharin sweetening agent; pyridoisothiazole; oxicam; tilcotil; piroxicam derivative. We’ll tell you more about this compound (cas:119639-24-6).

The isothiazoles I (R = CMe3, CH2CO2Et, R1 = Br) are not only dipolarophiles but also reactive and versatile dienophiles, especially with oxy-substituted 1,3-butadienes, I readily combine in Diels-Alder fashion; the regiospecificity of the addition is governed by the carbonyl group of the dienophile, whereas the SO2 group can be ignored for the purpose of predicting regioselectivity. Upon dehydrobromination of the [4 + 2] adducts with DBN, the cycloaromatization process is completed, generating saccharin-like compounds Besides the parent saccharin, several hydroxylated derivatives, e.g., II (R2 = OH, R3 = H; R2 = R3 = OH) have been synthesized by this new method. II are of potential interest as non-nutritive sweetening agents. In an alternative version of this principle, the isothiazole I (R = CMe3, CH2CO2Et, CH2C6H4OMe-4, R1 = H) is reacted with the oxazole III, affording, after acid-promoted rearrangement, pyrido-annulated isothiazoles IV. Since both processes generate saccharin-related structures, they may serve in syntheses of oxicams and analogs of ipsapirone. To demonstrate the viability of the approach one representative of each series, has been converted to an oxicam.

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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: 17927-65-0, is researched, Molecular Al2H8O13S3, about Image analysis of floc size distribution induced by two different impellers, the main research direction is image analysis floc size distribution impeller water.HPLC of Formula: 17927-65-0.

The goal is to analyze the relation between characteristic floc size and hydrodynamics. The 1st question concerned the relation between an average floc size and the viscous dissipation of kinetic energy. A series of flocculation experiments was conducted in a mixing tank with 2 impellers (a Rushton turbine and a Lightnin A310 impeller) for equivalent dissipated power conditions. The average floc size depended on the global dissipation rate whatever the impeller type. However, the floc size distributions are significantly different for each impeller. This difference can be explained by the spatial distribution of the dissipation rate of the turbulent kinetic energy, which depends on impeller type. The 2nd question concerned the dependence of the floc size to the history of mixing. The flocculation experiments show that the floc size distributions was reproducible once the flocs had been submitted to the highest velocity gradient.

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Synthetic Route of C10H16O4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about A Tale of Three Carboxylates: Cooperative Asymmetric Crystallization of a Three-Dimensional Microporous Framework from Achiral Precursors. Author is Zhang, Jian; Chen, Shumei; Nieto, Ruben A.; Wu, Tao; Feng, Pingyun; Bu, Xianhui.

Sym. crystallization of 3D porous materials constructed entirely from achiral building blocks by using enantiopure organic acids or amino acids as chirality-inducing agents is reported. Thus, the presence of D-camphor led to (+)-Mn3(HCOO)4(adc) (adc = 1,3-adamantanedicarboxylate), while L-camphor resulted in (-)-Mn3(HCOO)4(adc), which were characterized by x-ray crystallog. The chiral induction agent is essential to initiate the nucleation of the chiral crystals. The chirality control seems to be achieved through cooperative binding between enantiopure chiral reagents and achiral structural building units. Enantiopure chiral reagents control the absolute chirality of the crystals by participating in the nucleation and crystallization processes, but are later replaced with achiral ligands in the resulting crystals.

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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.Hurst, Derek T.; Beaumont, Claire; Jones, Derek T. E.; Kingsley, Deborah A.; Partridge, Julian D.; Rutherford, Trevor J. researched the compound: 2-Amino-6-methylpyrimidine-4-thiol( cas:6307-44-4 ).SDS of cas: 6307-44-4.They published the article 《The chemistry of pyrimidinethiols. II. The preparation and reactions of some 2-arenecarbonylmethylthiopyrimidines》 about this compound( cas:6307-44-4 ) in Australian Journal of Chemistry. Keywords: pyrimidinone phenacylthio; phenacylthiopyrimidinone. We’ll tell you more about this compound (cas:6307-44-4).

2-Pyrimidinethiones were treated with phenacyl halides to give (phenacylthio)pyrimidines I (R1= Ph, tolyl, halophenyl, anisyl, dimethyoxyphenyl, O2NC6H4, biphenyl, Cl2C6H3, naphthyl; R2 = Me, H, Ph, Pr, NH2). Some I were heated in Ph2O to give phenacylidenepyrimidinones II (R3 = Ph, tolyl, halophenyl, anisyl, dimethyoxyphenyl, O2NC6H4, biphenylyl, naphthyl; R4 = Me, H, Pr).

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Quality Control of Aluminum(III) sulfate xhydrate. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Dielectric properties of calcium, zinc, magnesium, copper, aluminum, iron, manganese, nickel, and cobalt sulfates. Author is Sychev, M. M.; Shiballo, V. G.; Katushkin, V. P.; Ustinov, A. E..

The dielec. constant (κ) of various sulfate hydrates of Ca2+, Zn2+, Mg2+, Cu2+, Al3+, Fe2+, Mn2+, Ni2+, and Co2+ was studied in relation to the n (number of mols. of bound water); the κ increased with an increase in n. A rectilinear equation κ = α + n × tg β is derived, where α = κ of anhydrous salt and tg β = tangent of the angle of curve κ-n. The compressive strength of cement stones, containing these crystallohydrates, decreased with an increase in tg β of the salt.

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Isothiazole – Wikipedia,
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Product Details of 17927-65-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Large-scale synthesis of mullite nanowires by molten salt method. Author is Huo, Kaifu; Zhu, Boquan; Fu, Jijiang; Li, Xuedong; Chu, Paul K..

Single-crystalline mullite (3Al2O3·2SiO2) nanowires have been produced in large quantities by a low cost and environmentally benign molten salt synthesis (MSS) method. The raw materials, Al2(SO4)3 and SiO2 powders, react in molten Na2SO4 at 1000 °C to produce mullite nanowires without the use of surfactants or templates. After the synthesis, the remaining salts can be easily separated from the products by washing with water. The final products are characterized by X-ray powder diffraction, field emission SEM, transmission electron microscopy, energy-dispersive X-ray spectroscopy, selected-area electron diffraction, and inductively coupled plasma-at. emission spectrometry. The thermal and chem. behavior of the raw materials is investigated by heating at a rate of 10 °C/min up to 1200 °C in air followed by thermogravimetric and differential scanning calorimetry analyses. The single-crystalline mullite nanowires have diameters of 30-80 nm and lengths from several hundreds of nanometers to micrometers and the growth mechanism is discussed.

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Beaudegnies, Renaud; Ghosez, Leon published an article about the compound: 2-(tert-Butyl)isothiazol-3(2H)-one 1,1-dioxide( cas:119639-24-6,SMILESS:O=C(C=C1)N(C(C)(C)C)S1(=O)=O ).Application In Synthesis of 2-(tert-Butyl)isothiazol-3(2H)-one 1,1-dioxide. 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:119639-24-6) through the article.

Chiral 1-azadienes I (R1, R2 = H, Me) derived from α,β-unsaturated aldehyde and Enders’ hydrazines cycloadd to cyclic dienophiles with high facial selectivities. The adducts can be readily converted into enantiomerically pure piperidine derivatives, e.g. II.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Prilling of aluminum sulfate hydrates, the main research direction is prilling aluminum sulfate; drop formation aluminum sulfate prilling; jet breakup aluminum sulfate prilling.SDS of cas: 17927-65-0.

A prilling technique was used to produce droplets of aluminum sulfate hydrates in the size range of 2-2.5mm. Production of spherical particles of aluminum sulfate hydrates by using a prilling technique has never been studied, nor carried out. The effects of the orifice geometry and hydrostatic head on drop formation were measured. The flow rates of hydrated aluminum sulfate melt through bores of 0.08 and 0.11 cm were measured for liquid heads of 10-100 cm. It was found that the break-up of a liquid jet produced particles in the size range 2.0-2.5 mm with a 0.8 mm orifice. The modified Meister and Scheele correlation, which is the first application on a high viscous fluid in air system, was found to be satisfactory for estimating the particle size obtained by the jet break-up mechanism.

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