Month: November 2022

Jiang, Ruihang published the artcileSynthesis of tetrazoles, triazoles, and imidazolines catalyzed by magnetic silica spheres grafted acid, Application In Synthesis of 2251-79-8, the publication is Synthetic Communications (2018), 48(20), 2652-2662, database is CAplus.

The magnetically separable catalysts are used in the synthesis of N-containing heterocycles, including tetrazoles I (R = Ph, 2-chlorophenyl, oxanthren-2-yl, etc.), triazoles II [R¹ = 2,4-Cl₂, 3-OH, 4-(CH₃)₂CH, etc.], and imidazolines III (R² = 3-methoxyphenyl, benzyl, 4-trifluoromethylphenyl, etc.). The magnetic silica sphere grafted sulfonic acid (MSS-SO₃H) is suitable for the synthesis of 1,2,3-triazoles I via the cycloaddition of nitroalkenes R¹C₆H₄CH=CHNO₂ with NaN₃, whereas the zinc-modified silica sphere catalyst (MSS-SO₃Zn) is more suitable for the synthesis of tetrazoles I. The MSS-SO₃Zn catalyst also works well for the synthesis of 2-substituted imidazolines III via the condensation of nitriles R²CN with ethylenediamine. Both MSS-SO₃H and MSS-SO₃Zn catalysts can be recovered easily by a magnet, and they can be reused without further tedious activation.

Synthetic Communications published new progress about 2251-79-8. 2251-79-8 belongs to isoxazole, auxiliary class Trifluoromethyl,Fluoride,Benzene, name is 5-(4-(Trifluoromethyl)phenyl)-1H-tetrazole, and the molecular formula is C8H5F3N4, Application In Synthesis of 2251-79-8.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Fernandes, Alessandra A. G. published the artcileRuCl₃/ PPh₃ – Catalyzed Direct Conversion of Isoxazol-5-ones to 2,3-Disubstituted Pyridines, Product Details of C9H7NO2, the publication is ChemistrySelect (2019), 4(12), 3360-3365, database is CAplus.

A novel catalytic system employing RuCl₃/ PPh₃ was described for the preparation of 2,3-disubstituted pyridines starting from 3,4-disubstituted isoxazol-5-ones and acrolein. Mechanistic studies involving ³¹P NMR, HRMS analyses and control experiments were performed in order to supported key events and intermediates proposed for this transformation.

ChemistrySelect published new progress about 1076-59-1. 1076-59-1 belongs to isoxazole, auxiliary class Oxazoline,Benzene,Ester, name is 3-Phenylisoxazol-5(2H)-one, and the molecular formula is C9H7NO2, Product Details of C9H7NO2.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Tuellmann, Carl Phillip published the artcilePreparation and Reactions of (1H-Tetrazol-5-yl)zinc Pivalates, Product Details of C8H5F3N4, the publication is Synthesis (2020), 52(16), 2357-2363, database is CAplus.

The preparation and reactivity of new solid heterocyclic organozinc reagents, namely N-protected (1H-tetrazol-5-yl)zinc pivalates I (R = benzyl, (4-methoxyphenyl)methyl; R¹ = [(2,2-dimethylpropanoyl)oxy]zincio), as storable solids with appreciably air and moisture stability are reported. They are obtained in high yields from protected 1H-tetrazoles I (R¹ = H) by deprotonation using the mixed zinc-magnesium base TMPZnCl.Mg(OPiv)₂ (abbreviated as TMPZnOPiv; TMP = 2,2,6,6-tetramethylpiperidyl). Subsequent cross-couplings and copper-catalyzed electrophilic aminations using hydroxylamine benzoates BzOR¹ (R¹ = 3-[ethoxy(oxo)methane]piperidin-1-yl, 4-(pyrimidin-2-yl)piperazin-1-yl, [(1R,4R)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydronaphthalen-1-yl](methyl)aminyl, (3-[4-[(2,6-difluorophenyl)carbonyl]phenyl]propyl)(2-phenylethyl)aminyl) give access to functionalized 1H-tetrazoles while tolerating many functional groups.

Synthesis published new progress about 2251-79-8. 2251-79-8 belongs to isoxazole, auxiliary class Trifluoromethyl,Fluoride,Benzene, name is 5-(4-(Trifluoromethyl)phenyl)-1H-tetrazole, and the molecular formula is C21H33N5O7, Product Details of C8H5F3N4.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Rajender, P. Sarita published the artcileSynthesis of novel isoxazole fused heterocycles, Computed Properties of 1076-59-1, the publication is Synthetic Communications (2012), 42(15), 2191-2200, database is CAplus.

Condensation of 3-aryl-4-formyl isoxazoles with 1,2-diamines led to the formation of 3-aryl-(6′,7′-benzo-1,5-heptadiazino)(3,2-d)-isoxazoles or isoxazolo-[5,4-b]-benzodiazepines and 3,10-diaryl-6,7,14,15-tetrhydro-13,16H-diisoxazole-(4,5-b;4,5-l)(1,4,8,11)-tetra-aza-cyclo-tetra-deca-4,14-diones, the novel seven- and 14-membered heterocyclic systems. Similar compounds are of great importance in medicinal chem.

Synthetic Communications published new progress about 1076-59-1. 1076-59-1 belongs to isoxazole, auxiliary class Oxazoline,Benzene,Ester, name is 3-Phenylisoxazol-5(2H)-one, and the molecular formula is C9H7NO2, Computed Properties of 1076-59-1.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Yang, Ling-ling published the artcileObservation on effect of parecoxib sodium for analgesia before operation on recovery period of patients undergoing remifentanil fast-track anesthesia, HPLC of Formula: 198470-85-8, the publication is Xiandai Zhenduan Yu Zhiliao (2016), 27(21), 4052-4053, database is CAplus.

A total of 58 patients undergoing laparoscopic cholecystectomy were selected and divided into a study group and a control group with 29 cases each. The study group received parecoxib sodium injection 20 min before surgery, and the control group received normal saline injection 20 min before surgery. The postoperative analgesic response of the two groups of patients was compared. Results The average arterial pressure and heart rate levels in the study group were lower than those in the control group at 5, 10, 15 and 30 min after extubation, and the difference was statistically significant (P < 0.05). The VAS score and restlessness score of the study group were significantly lower than those of the control group, and the difference was statistically significant (P < 0.05). In contrast, the Ram-say sedation score of the study group was significantly higher than that of the control group, and the difference was statistically significant (P < 0.05). The preoperative application of parecoxib sodium for analgesia has a pos. impact on the postoperative recovery effect of remifentanil fast-track anesthesia patients, can relieve the patients′ pain and other stress responses, and ensure the safety of patients′ anesthesia, which is worthy of promotion.

Xiandai Zhenduan Yu Zhiliao published new progress about 198470-85-8. 198470-85-8 belongs to isoxazole, auxiliary class Immunology/Inflammation,COX, name is Sodium ((4-(5-methyl-3-phenylisoxazol-4-yl)phenyl)sulfonyl)(propionyl)amide, and the molecular formula is C6H17NO3Si, HPLC of Formula: 198470-85-8.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Major, Louise L. published the artcileScreening the MayBridge Rule of 3 Fragment Library for compounds that interact with the Trypanosoma brucei myo-inositol-3-phosphate synthase and/or show trypanocidal activity, Product Details of C9H7NO2, the publication is Molecular Biology International (2011), 389364, 14 pp., database is CAplus and MEDLINE.

Inositol-3-phosphate synthase (INO1) has previously been genetically validated as a drug target against Trypanosoma brucei, the causative agent of African sleeping sickness. Chem. intervention of this essential enzyme could lead to new therapeutic agents. Unfortunately, no potent inhibitors of INO1 from any organism have been reported, so a screen for potential novel inhibitors of T. brucei INO1 was undertaken. Detection of inhibition of T. brucei INO1 is problematic due to the nature of the reaction. Direct detection requires differentiation between glucose-6-phosphate and inositol-3-phosphate. Coupled enzyme assays could give false positives as potentially they could inhibit the coupling enzyme. Thus, an alternative approach of differential scanning fluorimetry to identify compounds that interact with T. brucei INO1 was employed to screen ∼670 compounds from the MayBridge Rule of 3 Fragment Library. This approach identified 38 compounds, which significantly altered the T_m of TbINO1. Four compounds showed trypanocidal activity with ED50s in the tens of micromolar range, with 2 having a selectivity index in excess of 250. The trypanocidal and general cytotoxicity activities of all of the compounds in the library are also reported, with the best having ED50S of ∼20 μM against T. brucei.

Molecular Biology International published new progress about 1076-59-1. 1076-59-1 belongs to isoxazole, auxiliary class Oxazoline,Benzene,Ester, name is 3-Phenylisoxazol-5(2H)-one, and the molecular formula is C9H7NO2, Product Details of C9H7NO2.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Agafonova, Anastasiya V. published the artcileSynthesis of 2-halo-2H-azirine-2-carboxylic acid amides and esters by isomerization of 5-(dialkylamino/alkoxy)-substituted isoxazoles, catalyzed by iron(II) sulfate, Recommanded Product: 3-Phenylisoxazol-5(2H)-one, the publication is Chemistry of Heterocyclic Compounds (New York, NY, United States) (2017), 53(10), 1068-1071, database is CAplus.

N,N-Dialkylamides and esters of 2-(chloro/bromo/iodo)-2H-azirine-2-carboxylic acids were synthesized by isomerization of 4-halo-5-(dialkylamino/alkoxy)isoxazoles in the presence of catalytic amounts of FeSO₄·7H₂O. The use of iron(II) sulfate as catalyst, compared to its chloride, provides the advantage of avoiding halide exchange products in isomerization reactions of 4-bromo- and 4-iodoisoxazoles, as well as prevents catalyst deactivation by the 5-amino substituent of isoxazole, compared to rhodium(II) carboxylates.

Chemistry of Heterocyclic Compounds (New York, NY, United States) published new progress about 1076-59-1. 1076-59-1 belongs to isoxazole, auxiliary class Oxazoline,Benzene,Ester, name is 3-Phenylisoxazol-5(2H)-one, and the molecular formula is C9H7NO2, Recommanded Product: 3-Phenylisoxazol-5(2H)-one.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Korsakov, M. K. published the artcileA new method for synthesis of atomoxetine and its interaction with azole-containing sulfonyl chlorides, Application of 5-(3-Methylisoxazol-5-yl)thiophene-2-sulfonyl chloride, the publication is Zhurnal Organichnoi ta Farmatsevtichnoi Khimii (2013), 11(4), 38-41, database is CAplus.

A new approach to the synthesis of atomoxetine using the methods of enzymic catalysis has been developed; the interaction of atomoxetine with a number of azole-containing heterocyclic sulfochlorides has been studied. The carbonyl group of 3-chloro-1-phenyl-propane-1-one was region-specifically reduced with NADPH-dependent carbonylreductase (SSCR) in phosphate buffer solution In Mitsunobu reaction with o-methylphenol the inversion of the final product configuration takes place and [R]-1-(3-chloro-1-phenypropoxy)-2-methylbenzene is formed. Its further treatment with methylamine results in the base of atomoxetine, which may be isolated from the solution as a chloride. In order to develop the novel biol. active compounds the series of sulfonyl chlorides with oxazole and isoxazole substituents were reacted with atomoxetine. The sulfonamides obtained fully comply with all criteria for the mols. – candidates for the biomedical study.

Zhurnal Organichnoi ta Farmatsevtichnoi Khimii published new progress about 1282218-14-7. 1282218-14-7 belongs to isoxazole, auxiliary class Thiophene,Isoxazole,Chloride,Sulfonyl chlorides, name is 5-(3-Methylisoxazol-5-yl)thiophene-2-sulfonyl chloride, and the molecular formula is C8H6ClNO3S2, Application of 5-(3-Methylisoxazol-5-yl)thiophene-2-sulfonyl chloride.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Liu, Xiaobing published the artcilePalladium-catalyzed C-H bond activation for the assembly of N-aryl carbazoles with aromatic amines as nitrogen sources, Recommanded Product: 9-(4-Fluorophenyl)-9H-carbazole, the publication is Chemical Communications (Cambridge, United Kingdom) (2020), 56(11), 1665-1668, database is CAplus and MEDLINE.

A convenient and efficient palladium-catalyzed C-H bond activation for the assembly of N-aryl carbazoles I (Ar = 4-methylphenyl, 3-fluorophenyl, naphthalen-2-yl, etc.; R¹ = H, 2-OCH₃, 4-CH₃, etc.; R² = H, CH₃, Cl, CF₃, OCF₃, CO₂CH₃), including 7-phenyl-7H-benzofuro[2,3-b]carbazole and 9-phenyl-9H-pyrido[3,4-b]indole is reported, in which two C-N bonds were formed under one set of conditions. The desired carbazoles I were achieved in decent yields with a wide substrate scope by utilizing readily available 2-iodo biphenyls 2-I-4-R²C₆H₄ R¹C₆H₄ and aromatic amines ArNH₂ as starting materials.

Chemical Communications (Cambridge, United Kingdom) published new progress about 57103-14-7. 57103-14-7 belongs to isoxazole, auxiliary class Fused Tricycles,Carbazoles, name is 9-(4-Fluorophenyl)-9H-carbazole, and the molecular formula is C18H12FN, Recommanded Product: 9-(4-Fluorophenyl)-9H-carbazole.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem

Huang, Saisai published the artcileEffect of parecoxib sodium on IL-6 and angiotensin II of knee surgery patients, Quality Control of 198470-85-8, the publication is Jiangsu Yiyao (2016), 42(8), 956-958, database is CAplus.

Effect of parecoxib sodium on IL-6 and angiotensin II of knee surgery patients was studied. 38 Knee surgery patients were divided into two groups, treatment group with parecoxib sodium, control group with NS. IL-6 and A-II were detected at before anesthesia T0, 0.5 h after begin T1, 1.5 h T2, ending T3. IL-6 nd A-II of T1-T3 were higher than T0, which of treatment group were lower than control group. Parecoxib sodium improved inflammation of knee surgery.

Jiangsu Yiyao published new progress about 198470-85-8. 198470-85-8 belongs to isoxazole, auxiliary class Immunology/Inflammation,COX, name is Sodium ((4-(5-methyl-3-phenylisoxazol-4-yl)phenyl)sulfonyl)(propionyl)amide, and the molecular formula is C19H17N2NaO4S, Quality Control of 198470-85-8.

Referemce:
https://en.wikipedia.org/wiki/Isoxazole,
Isoxazole | C3H3NO – PubChem