Day: April 2, 2022

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 The influence of environmental factor on the coagulation enhanced ultrafiltration of algae-laden water: Role of two anionic surfactants to the separation performance, the main research direction is environmental factor coagulation enhanced ultrafiltration algae laden water; algae laden water anionic surfactant separation; Algae-laden water; Anionic surfactant; Coagulation; Fouling mechanism; Ultrafiltration.Name: Aluminum(III) sulfate xhydrate.

With the acceleration of urbanization and the improvement of people′s living standards, more chems. that humans rely on are entering the city and surrounding water bodies. Anionic surfactants are one of the essential products for human beings. It is also one of the inducements that cause the eutrophication. The algae-laden water caused by eutrophication is a headache in the traditional water treatment process. To solve the problem, ultrafitration combined process was widely investigated to treat the algae-laden water. The presence of stimuli, low concentration anionic surfactant, probably interfere the performance of ultrafiltration process during algae-laden water treatment. In this study, the influence of two typical anionic surfactants, sodium dodecyl sulfate (SDS) and sodium dodecyl benzene sulfonate (LAS), on the performance of coagulation-enhanced ultrafiltration was investigated. The aluminum sulfate hydrate and iron sulfate hydrate were resp. employed as coagulant. Based on the residual turbidity and zeta potential, 4 mg/L Al and 8 mg/L Fe were determined as the optimal coagulant dosage. The floc morphol. confirmed that Al-algae flocs with lower fractal dimension (Df) were looser and more porous compared to Fe-algae flocs. More coagulant was depleted by LAS due to the better hydrophobicity of LAS. During the filtration process, LAS caused a larger flux reduction compared with SDS regardless of the coagulant that was used. More organic compounds penetrate into membrane pores and block the pores with the presence of LAS since algal cell aggregation was weakened. Finally, the rejection of organic compounds by the coagulation-enhanced ultrafiltration process was studied, and the co-existing surfactants can cause effluent deterioration. Therefore, the presence of surfactants has a neg. effect to the ultrafiltration treatment of algae-laden water.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Application of 17927-65-0. 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: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Solubility and solid phases in the sulfuric acid-sodium sulfate-aluminum sulfate-water system at 50°. Author is Lepeshkov, I. N.; Danilov, V. P.; Selin, A. N.; Kim, V. P.; Zaitseva, L. A.; Gorbacheva, N. N..

Solubility and composition of the solid phases in the H2SO4-Na2SO4-Al2(SO4)3-H2O system were determined for H2SO4 concentrations of 3-12 weight%. Under the given conditions Na2SO4, NaAl(SO4)2.12H2O and Al2(SO4)3.17H2O crystallize.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid( cas:560-09-8 ) is researched.Reference of (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid.Liu, Bo; Shekhah, Osama; Arslan, Hasan K.; Liu, Jinxuan; Woell, Christof; Fischer, Roland A. published the article 《Enantiopure Metal-Organic Framework Thin Films: Oriented SURMOF Growth and Enantioselective Adsorption》 about this compound( cas:560-09-8 ) in Angewandte Chemie, International Edition. Keywords: enantiopure metalorganic framework oriented film growth enantioselective adsorption. Let’s learn more about this compound (cas:560-09-8).

The LPE growth of [Zn2[(+)cam]2(dabco)n] [(+)cam = (1R,3S)-(+)-camphoric acid, dabco = 1,4-diazabicyclo[2.2.2]octane] and its enantiomeric form and their application to the direct QCM (quartz crystal microbalance) monitoring of the uptake of a pair of enantiomeric guest mols., namely (2R,5R)-2,5-hexanediol (R-HDO) and (2S,5S)-2,5-hexanediol (S-HDO) from the gas phase under flow conditions are described. As examined by surface X-ray diffraction in out-of-plane and in-plane modes, the SURMOFs (surface-attached MOFs) were grown in (110) and (001) orientations on SAMs of MHDA and PPMT, with MHDA = 16-mercaptohexadecanoic acid; PPMT = (4,(4-pyridyl)phenyl)methanethiol, resp., on Au-coated QCM substrates. The difference of absolute uptake and absorption rate for each of the chosen enantiomeric probe mols. R-HDO and S-HDO is clear, and show significant enantioselectivity.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Pyrimidines. I. Synthesis of pyrimidinethiols》. Authors are Koppel, Henry C.; Springer, Robert Henre; Robins, Roland K.; Cheng, C. C..The article about the compound:2-Amino-6-methylpyrimidine-4-thiolcas:6307-44-4,SMILESS:SC1=CC(C)=NC(N)=N1).Computed Properties of C5H7N3S. Through the article, more information about this compound (cas:6307-44-4) is conveyed.

cf. CA 54, 6747a. The 9 previously unknown isomers of the 22 possible substituted pyrimidinethiols, containing H, HO, NH2, and SH as substituents were synthesized and methods for preparation of some of the previously reported compounds were improved. Various derivatives of RC:N.CR1:N.CR2:CH (I) were prepared for preliminary screening as antitumor agents. HOCH2CH2OH (200 ml.), 125 g. 4,5-Cl(MeS)C4H2N2, and 200 g. NaSH heated slowly to 100° with frothing and bubbling, the mixture carefully heated to 150° and kept 30 min., the solution poured into 1500 ml. H2O and the boiled, decolorized hot filtrate acidified with AcOH, the precipitate reprecipitated from hot dilute aqueous NH4OH with AcOH gave 85 g. I (R = H, R1 = R2 = SH), converted by concentrated HBr to I (R = R1 = H, R2 = SH). NaHS (42 g.) and 13 g. 4,6,2-Cl(HO)(MeS)C4HN2 in 120 ml. HOCH2CH2OH heated 30 min. at 150°, the cooled mixture poured into 500 ml. H2O and the boiled decolorized solution filtered, acidified with AcOH to pH 5 and the refiltered solution adjusted to pH 1.0 with dilute HCl, the product reprecipitated from solution in dilute NH4OH with HCl, and the product recrystallized from HCONMe2-H2O gave 9.0 g. I (R = OH, R1 = R2 = SH), m. 262-4° (method A). The appropriate chloropyrimidine (60 g.) in 500 ml. absolute alc. refluxed 3 hrs. with 150 g. NaHS, the chilled mixture filtered and the alc. washed precipitate boiled in 1 l. H2O, the decolorized solution filtered, the filtrate acidified and the precipitate recrystallized from the appropriate solvent gave RC:N.CR1: N.CR2:CR3 (II) (method B). In method C the procedure was the same but no precipitate was formed. The light yellow alc. solution was diluted with 1 l. boiling H2O and acidified and the precipitate recrystallized The appropriate chloropyrimidine (40 g.) and 40 g. (H2N)2CS in 500 ml. absolute alc refluxed 2 hrs. the mixture chilled and the precipitated ligroine-washed product purified by reprecipitation and recrystallization gave II (method D). The appropriate chloropyrimidine (35 g.) and 70 g. powd. NaHS in 400 ml. H2O was autoclaved 4 hrs. at 150°/8 atm., the solution boiled and the decolorized solution filtered, acidified with AcOH [for the preparation of I (R = NH2, R1 = SH, R2 = OH)] or dilute HCl [for the preparation of I (R = SH, R1 = R2 = OH)], and the products purified by recrystallization (method E). I (R = NH2, R1 = SH, R2 = OH) (50 g. finely powd. and dried at 100°) refluxed 2 hrs. with 150 g. P2S5 in 1.5 l. dry C5H5N, excess C5H5N evaporated in vacuo and the residue diluted cautiously with 750 ml. H2O, the mixture refluxed 2 hrs. on a steam bath with evolution of H2S, the chilled mixture filtered and adjusted to pH 2, the volume reduced to 33% in vacuo and the cooled concentrate filtered, the residue taken up in dilute NH4OH and the boiled decolorized solution filtered, acidified with dilute HCl and the precipitate recrystallized from HCONMe2-H2O gave 35 g. I (R = H2N, R1 = R2 = SH). Purified P2S5 (125 g.) and 52 g. I (R = R1 = H, R2 = OH) refluxed 1 hr. with stirring in l. C5H5N, the hot solution poured into 1 l. H2O and the solution heated on a steam bath 3 hrs., the filtered solution evaporated in vacuo to 200 ml., refrigerated and the H2O-washed product recrystallized from 500 ml. boiling H2O gave 42 g. I (R = R1 = H, R2 = SH). I(R = R2 = Cl, R1 = NH2) (33 g.) added to 1 l. 4:1 alc.-H2O containing 40 g. NaOH saturated with H2S, the mixture refluxed with stirring 2 hrs. with passage of H2S, treated with C and the filtered solution acidified with AcOH gave 42 g. I (R = SH, R1 = NH2, R2 = Cl), m. 302° (decomposition), λ 260 mμ (ε 9800, pH 1), λ 280 mμ (ε 12,500, pH 11), converted by autoclaving with NaHS to I (R = SH, R1 = R2 = OH). I (R = R2 = OH, R1 = SH)(60 g.)in 1 l. 2N NaOH stirred 3 hrs. with dropwise addition of 50 g. Me2SO4, the solution boiled with addition of C and the decolorized filtered solution acidified to pH 1.0 with HCl gave 50 g. I (R = R1 = OH, R1 = MeS) (III), m. above 360° (H2O). III (80 g.) refluxed 2 hrs. with 500 ml. POCl3, excess POCl3 removed in vacuo and the residue poured with stirring over crushed ice, the mixture stirred 20 min. at 0°, filtered and the precipitate washed in ice H2O until the pH of the washings was no longer below 5, the material dried 16 hrs. in vacuo and recrystallized from MeOH and H2O gave 64 g. I (R = R2 = Cl, R1 = MeS) (IV), m 43°. Treatment of IV with NaHS at 150° in HOCH2CH2OH gave I (R = R1 = R2 = SH). NaHS (75 g.) in 500 ml. MeOH at 50° stirred with portionwise addition of 50 g. IV, the mixture stirred 30 min. before dilution with 1 l. H2O, the solution boiled with C and the filtered solution acidified, the product reprecipitated from dilute NH4OH with AcOH, and recrystallized from HCONMe2-H2O gave 40 g. I (R = R2 = HS, R1 = MeS), m. above 360°. IV (50 g.) refluxed with stirring 4 hrs. in 500 ml. 2N NaOH, the solution decolorized and the filtered solution acidified with AcOH, the precipitate purified by reprecipitation and recrystallized from HCONMe2-H2O gave 40 g. I (R = Cl, R1 = MeS, R2 = OH), m. 208°. Absolute MeOH (150 ml.) at 0° treated with 30 g. finely powd. IV, the mixture stirred 45 min. with passage of dry Cl, filtered from 8 g. product, and the filtrate evaporated at 20° in a stream of dry air gave 12 g. product; the crops combined and recrystallized from EtOAc and C7H16 gave 17 g. I (R = R2 = Cl, R1 = MeSO2) (V), m. 119°. V (15 g.) warmed in 200 ml. N NaOH, the filtered solution chilled and the precipitate washed with cold H2O and alc., the dry salt (11.6 g.) in 150 ml. H2O carefully neutralized with HCl and the solution evaporated in vacuo, the residue taken up in boiling Me2CHOH and diluted with C7H16 gave 5 g. I (R = R2 = Cl, R1 = OH), m. 262° (Me2CHOHC7H16). The ultraviolet absorption spectra of the completed series of I showed the approx. maximum of the major peak of I in solutions at pH 1.0 were 280, 300-20, 320-40, and 360-70 mμ for 2-pyrimidinethiols, 4-pyrimidinethiols, 2,4-pyrimidinedithiols, and 4,6-pyrimidinedithiols, resp. Data for I and for a number of known thiopyrimidines, II, not previously published are recorded for comparison [R, R1, R2, R3, m.p. (solvents), and % yield given]: H, SH, H, H, 229-30° (alc.), 70; H, H, SH, H, 190-2° (H2O), 69; H, OH, SH, H, 298-300° (H2O-HCONMe2), 88; H, SH, OH, H, 310-12° (H2O), 73; H, NH2, SH, H, 231-3° (H2O-HCONMe2), 68; OH, H, SH, H, 247° (H2O), 79; H2N, H, SH, H, 306° (H2O-HCONMe2), 61; H, SH, SH, H, 300° (H2O), 70; HS, H, SH, H, 250-2° (H2O), 70; OH, SH, OH, H, above 360° (H2O-HCONMe2), 84; OH, OH, SH, H, 245° (H2O), 54; H2N, OH, SH, H, 355° (H2O-HCONMe2), 43; OH, H2N, SH, H, above 360° (H2O-HCONMe2), 82; H2N, H2N, SH, H, above 360° (reprecipitation), 50; H2N, SH, OH, H, above 360° (reprecipitation), 91; H2N, SH, H2N, H, above 360° (reprecipitation), 93; OH, SH, SH, H, 262-4° (H2O-HCONMe2), 79; H2N, SH, SH, H, above 360° (H2O-HCONMe2), 60; SH, OH, SH, H, 266-7° (H2O-HCONMe2), 46; SH, H2N, SH, H, 267° (H2O), 76; SH, SH, SH, H, above 360° (reprecipitation), 70; Cl, H2N, H, Cl, above 360° (reprecipitation), 63; Me, H2N, SH, H, 321° (reprecipitation), 84; Me, H2N, SH, Br, 207° (H2O-HCONMe2), 98; Me, SH, SH, H, above 360° (H2O-HCONMe2), 70; H, SH, SH, CO2H, 261-3° (H2O-HCONMe2), 63; SH, H, SH, Cl, 215-17° (reprecipitation), 70; SH, H, SH, Br, 213° (reprecipitation), 92; SH, H2N, SH, Ph, 266-8° (H2O-HCONMe2), 60; H, MeS, SH, H, 203° (H2O-HCONMe2), 96; Me, MeS, SH, H, 239° (H2O-HCONMe2), 78; SH, MeS, SH, H, above 360° (H2O-alc.), 80. For comparison of structure and biol. activities in pyrimidine thiols, a number of new related 4-pyrimidine thiols substituted in position 5 were synthesized. Thiopyrimidine (0.08 mole) stirred in 250 ml. N NaOH treated with a stoichiometric amount of the appropriate alkyl halide, the mixture stirred 3 hrs. and the H2O-washed precipitate recrystallized gave the corresponding alkylthiopyrimidine (method A). Similarly, the above reaction mixture on failure to give a precipitate was acidified with AcOH and the product recrystallized to yield the required alkyl thiopyrimidine (method B). The yields ranged from 80 to 95%. Phys. data for alkylthio- and aralkylthiopyrimidines are listed [R, R1, R2, R3 of formula II, method of synthesis, m.p. (solvent, if other than HCONMe2 + H2O) given]: MeS, H, OH, H, B, 230° (H2O); PhCH2S, H, OH, H, B, 238-9°; 2,4-Cl2C6H3CH2S, H, OH, H, B, 191.3°; MeS, H, H2 N, H, A, 168-70°; EtS, H, H2N, H, A, 147-9°; PhCH2S, H, H2N, H, A, 140°; 2,4-Cl2C6H3CH2S, H, H2N, H, A, 184-6°; p-O2NC6H4CH2S, H, H2N, H, A, 165-7°; MeS, H, MeS, H, A, 52-4° (C7H16); MeS, H, MeS, H2N, A, 79°; MeS, H, MeS, Cl, A, 118-20°; EtS, H, EtS, Cl, A, 58-9°; PhCH2S, H, PhCH2S, Cl, A, 86-8°; 2,4-Cl2C6H3CH2S, H 2,4-Cl2C6H3CH2S, Cl, A, 155°; MeS, H, MeS, Br, A, 155°; PrS, H, PrS, Br, A, 44-6°; PhCH2S, H, PhCH2S, Br, A, 95-7°; 2,4-Cl2C6H3CH2S, H, 2,4-Cl2C6H3CH2S, Br, A, 149°; p-O2NC6H4CH2S, H, p-O2NC6H4CH2S, Br, A, 168-70°; PhCH2S, OH, OH, H, B, 242°; H, OH, o-ClC6H4CH2S, H, A, 174-6°; H, OH, 2,4-Cl2C6H3CH2S, H, A, 193-4°; MeS, H2N, H, H, A, 150-3°; Et, H2N, H, H, A, 155°; PhCH2S, H2N, H, H, A, 178-80°; 2,4-Cl2C6H3CH2S, H2N, H, H, A, 155-7°; o-ClC6H4CH2S, H2N, Me, H, A, 143-5°; MeS, H2N, Cl, H, A, 106-8°; EtS, H2N, Cl, H, A, 109-10°; PrS, H2N, Cl, H, A, 105-6°; PrS, H2N, Me, Br, A, 95-7°; o-ClC6H4CH2S, H2N, Me, Br, A, 138-40°; p-O2NC6H4CH2S, H2N, Me, Br, A, 226-8°; EtS, H2N, EtS, H, A, 54°; PrS, H2N, PrS, H, A, 85-7°; PhCH2S, H2N, PhCH2S, H, A, 134-6°; 2,4-Cl2C6H3CH2S, H2N, 2,4-Cl2C6H3CH2S, H, A, 159-61°; MeS, H2N, MeS, Ph, A, 128-9° (C7H15); PhCH2S, H2N, PhCH2S, Ph, A, 207-9° (C7H15); o-ClC6H4CH2S, H2N, o-ClC6H4CH2S, Ph, A, 174-5° (EtOAc); 2,4-Cl2C6H3CH2S, H2N, 2,4-Cl2C6H3CH2S, Ph, A, 164-7° (PhMe); MeS, MeS, Me, H, A, 43-5° (C7H15); 2,4-Cl2C6H3CH2S, MeS, Me, H, A, 100-2°; H2N, MeS, MeS, H, A, 121-3°; MeS, MeS, MeS, H, A, 114-16°; H, MeS, MeS, CO2H, B, 201-3°; PhCH2S, PhCH2S, Me, H, A, 37-9° (C7H15); o-ClC6H4CH2S, o-ClC6H4CH2S, o-ClC6H4CH2S, H, A, 117-18° (H2O-alc.); 2,4-Cl2C6H3CH2S, 2,4-Cl2C6H3CH2S, H, H, A, 94-6° (C7H15); 2,4-Cl2C6H3CH2S, 2,4-Cl2C6H3CH2S, Me, H, A, 107-9° (C7H15); H2N, 2,4-Cl2C6H3CH2S, 2,4-Cl2C6H3CH2S, H, A, 125-7° (C7H15); 2,4-Cl2C6H3CH2S, 2,4-Cl2C6H3CH2S, 2,4-Cl2C6H3CH2S, H, A, 120-4°. Other II prepared were (R, R1, R2, R3, method of synthesis, and m.p. (solvent) given): MeS, OH, H2N, H, B, 294° (H2O); MeS, H2N, Me, H, A, 152°; EtS, H2N, Me, H, A, 122-4°; BuS, H2N, Me, H, A, 70-2°; PhCH2S, H2N, Me, H, A, 118-20°; 2,4-Cl2C6H3CH2S, H2N, Me, H, A, 157-60°; p-O2NC6H4CH2S, H2N, Me, H, A, 157-9°; MeS, H2N, OH, H, B, 274-6°; EtS, H2N, OH, H, B, 248°; PrS, H2N, OH, H, B, 228-32°; BuS, H2N, OH, H, B, 240-2°; C6H11S, H2N, OH, H, B, 185°; MeS, H2N, Me, Br, A, 140-2°; PhCH2S, H2N, Me, Br, A, 135-7°; MeS, H2N, MeS, H, A, 116-18°; OH, MeS, MeS, H, B, 197° (H2O). Ultraviolet maximum at pH 1 and 11 were given for the II prepared

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Kloprogge, J. T.; Frost, R. L. published an article about the compound: Aluminum(III) sulfate xhydrate( cas:17927-65-0,SMILESS:O=S(O)(O)=O.O=S(O)(O)=O.O=S(O)(O)=O.[H]O[H].[Al].[Al] ).Related Products of 17927-65-0. 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:17927-65-0) through the article.

The tridecameric Al polymer [AlO4Al12(OH)24(H2O)12]7+ was prepared by forced hydrolysis of Al3+ up to an OH/Al molar ratio of 2.2. Upon addition of sulfate the tridecamer crystallized as the monoclinic basic Al sulfate Na0.1[AlO4Al12(OH)24(H2O)12](SO4)3.55. These crystals were studied using Raman microscopy at 300 and 77 K and compared to Na2SO4.xH2O and Al2(SO4)3.xH2O. The Raman spectrum of basic Al sulfate is dominated by 2 broad bands, which are assigned to the ν2 and ν4 SO42- triplets at 446, 459 and 496 and 572, 614 and 630 cm-1. The ν1 is observed as a single band at 990 cm-1, partly overlapped by the ν3 triplet at 979, 1009 and 1053 cm-1 of the sulfate group in the Al13 sulfate structure. Also the band at 726 cm-1 is assigned to an Al-O mode of the polymerized Al-O-Al bonds in the Al13 Keggin structure. The OH-stretching region of the basic Al sulfate was reported. The 77 K spectrum shows 3 crystal H2O bands at 3035, 3138 and 3256 cm-1 accompanied by 3 Al-H2O bands at 3354, 3418 and 3498 cm-1 and 4 Al-OH bands at 3533, 3584, 3671 and 3697 cm-1.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Computed Properties of Al2H8O13S3. 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: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Dielectric measurements in the early stages of hardening of monomineral binders. Author is Svatovskaya, L. B.; Shiballo, V. G..

The dielec. permeability ε of cement hardening systems decreased immediately after preparing suspensions and condensation structures with water were formed having a lower ε. At the end of the hardening process, ε remained constant Because only a small part of the water was chem. bound, the decrease in ε could be connected with the orientation effect. The curves of dielec. losses of the hardening pastes had a complex cyclic character. According to crystallo-optical data, the cyclic character was connected with changes in the phase composition of 3CaO.Al2O3,3CaO.SiO2, and Al2(SO4)3 hydrates and in the 3CaO.Al2O3 + CaSO4 system with the discontinuities of hydrated sulfate aluminate and hydrated aluminate layers.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Safety of (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid. 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. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Highly selective biotransformation of (+)-(1S)- and (-)-(1R)-camphorquinone by Aspergillus wentii.

To clarify the structures of biotransformation products and metabolic pathways, the biotransformation of monoterpenoids, (+)- and (-)-camphorquinone (1a and b), has been investigated using Aspergillus wentii as a biocatalyst. Compound 1a was converted to (-)-(2S)-exo-hydroxycamphor (2a), (-)-(2S)-endo-hydroxycamphor (3a), (-)-(3S)-exo-hydroxycamphor (4a), (-)-(3S)-endo-hydroxycamphor (5a), and (+)-camphoric acid (6a). Compound 1b was converted to (+)-(2R)-exo-hydroxycamphor (2b), (+)-(2R)-endo-hydroxycamphor (3b), (+)-(3R)-exo-hydroxycamphor (4b), (+)-(3R)-endo-hydroxycamphor (5b), and (-)-camphoric acid (6b). Compound 1a mainly produced 2a (65.0%) with stereoselectivity, whereas 1b afforded 3b (84.3%) with high stereoselectivity. These structures were confirmed by gas chromatog.-mass spectrometry, IR, 1H NMR (NMR), and 13C NMR spectral data. The products illustrate the marked ability of A. wentii for enzymic oxidation and ketone reduction

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Reference:
Isothiazole – Wikipedia,
Isothiazole – 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: 6307-44-4, is researched, Molecular C5H7N3S, about The chemistry of pyrimidinethiols. II. The preparation and reactions of some 2-arenecarbonylmethylthiopyrimidines, the main research direction is pyrimidinone phenacylthio; phenacylthiopyrimidinone.Recommanded Product: 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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Reference:
Isothiazole – Wikipedia,
Isothiazole – 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: 560-09-8, is researched, Molecular C10H16O4, about Two Homochiral Bimetallic Metal-Organic Frameworks Composed of a Paramagnetic Metalloligand and Chiral Camphorates: Multifunctional Properties of Sorption, Magnetism, and Enantioselective Separation, the main research direction is solvothermal preparation homochiral cobalt tristriazolylborate copper camphorate porous MOF; crystal structure homochiral cobalt tristriazolylborate copper camphorate porous MOF; thermal decomposition homochiral cobalt tristriazolylborate copper camphorate porous MOF; gas adsorption homochiral cobalt tristriazolylborate copper camphorate porous MOF; magnetic property homochiral cobalt tristriazolylborate copper camphorate porous MOF.HPLC of Formula: 560-09-8.

Two porous metal-organic frameworks [Co(Tt)2][Cu4(D-cam)4]·5H2O·DMF (1; Tt = tris(triazolyl)borate, D-H2cam = D-(+)-camphoric acid or (1R,3S)-1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid) and [Co(Tt)2][Cu4(L-cam)4]·5H2O·2DMF (2; L-H2cam = L-(-)-camphoric acid or (1S,3R)-1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid) were prepared by mixing Cu2+, Co(Tt), and camphoric acid under solvothermal conditions. The structures of 1 and 2 reveal that the two-dimensional layers composed of chiral ligands and Cu-Cu paddlewheel units are connected through the metalloligands to form three-dimensional networks. These solids show multifunctional properties such as gas adsorption onto the pores of the frameworks, antiferromagnetic coupling between spin carriers, and a small enantioselective separation of racemic alcs.

As far as I know, this compound(560-09-8)HPLC of Formula: 560-09-8 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Vitamin D3: synthesis of seco C-9,11,21-trisnor-17-methyl-1α, 25-dihydroxyvitamin D3 analogues, the main research direction is vitamin D3 analog antiproliferative antitumor calcemic effect preparation; trisnormethyldihydroxyvitamin D3 D ring analog preparation.Formula: C10H16O4.

The synthesis and biol. activities of seco C-9,11,21-trisnor-17-methyl-1α,25-dihydroxyvitamin D3 analogs (D-ring analogs) are described. Synthesized analogs were evaluated for their affinity for the vitamin D receptor, in vivo calcemic effects in mice, and anti-proliferative activity in various cell lines.

As far as I know, this compound(560-09-8)Formula: C10H16O4 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com