Tag: M.W:100-200

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Chloropyridine 1-oxide( cas:2402-95-1 ) is researched.Recommanded Product: 2402-95-1.Ding, Yong; Zhao, Wei published the article 《The oxidation of pyridine and alcohol using the Keggin-type lacunary polytungstophosphate as a temperature-controlled phase transfer catalyst》 about this compound( cas:2402-95-1 ) in Journal of Molecular Catalysis A: Chemical. Keywords: pyridine oxide preparation; oxidation pyridine polytungstophosphate catalyst; ketone preparation; alc oxidation polytungstophosphate catalyst. Let’s learn more about this compound (cas:2402-95-1).

A novel temperature-controlled phase transfer catalyst of [(C18H37)2(CH3)2N]7[PW11O39] has been developed for the oxidation of pyridines and alcs. with hydrogen peroxide. The reactions were conducted in 1,4-dioxane, and high yields of the corresponding heterocyclic N-oxides and ketones were obtained under relative mild conditions. The catalyst could be easily recovered and reused after reaction with cooling. There was no discernable loss in activity and selectivity after several reaction cycles.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Recommanded Product: 3235-67-4. 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: 1-Piperidineacetic Acid, is researched, Molecular C7H13NO2, CAS is 3235-67-4, about Difference spectra of P-450 in rat liver microsomes induced by piperidine N-derivatives and the spectral dissociation constant of each derivative. Author is Kimura, Katsuhiko; Nagaoka, Masao; Ohgiya, Shozaburo.

Piperidinoacetic acid [3235-67-4], N-cinnamylpiperidine [70552-70-4] and 3-piperidino-1-phenyl-1-propanone [73-63-2] caused type I spectral changes of cytochrome P-450 [9035-51-2] in reaction with the rat liver microsomes, whereas N-methylpiperidine (I) [626-67-5] caused type II spectral change. 2-Piperidinoethanol [3040-44-6] caused a modified type II spectral change. The apparent dissociation constants calculated from spectral changes for varying concentrations of the above compounds were in close correlation with the rates of N-C cleavage of those compounds by the microsomes.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

HPLC of Formula: 2402-95-1. 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: 2-Chloropyridine 1-oxide, is researched, Molecular C5H4ClNO, CAS is 2402-95-1, about New synthesis of ZPT additive. Author is Zhao, Zengguo; Li, Wei; Zhang, Songwei; Hao, Jinku; Wang, Guilin.

2-Pyridinethiol-1-oxide zinc salt (ZPT) was prepared via photochlorination, N-oxidation, mercaptization, and complexation 4 steps. It is a very good additive of antipruritic and antidandruff of shampoo. The new synthetic method reduced the steps and raised the productivity. The total yield reached 70%.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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: 2402-95-1, is researched, Molecular C5H4ClNO, about Synthesis of 4-amino-2-chloropyridine, the main research direction is aminochloropyridine preparation.Electric Literature of C5H4ClNO.

4-Amino-2-chloropyridine was synthesized from 2-chloropyridine by oxidation with hydrogen peroxide and nitration with fuming nitric acid to give 2-chloro-4-nitropyridine-N-oxide followed by reduction in 75% overall yield.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The synthesis of esters of some amino acids having pharmacological importance. I. The synthesis of esters of piperidino carboxylic acids》. Authors are Matkovics, Bela; Foldeak, Sandor; Porszasz, Janos; Sipos, Gyorgy.The article about the compound:1-Piperidineacetic Acidcas:3235-67-4,SMILESS:OC(=O)CN1CCCCC1).Product Details of 3235-67-4. Through the article, more information about this compound (cas:3235-67-4) is conveyed.

RCH2CO2R’ (I), RCH2CH2CO2R’ (II), BzOCH2CH2R (III), and AcOCHMeCH2R (IV) were prepared I were prepared by condensing ClCH2CO2R’ with a secondary amine, II by boiling ClCH2CH2CO2R’ with the amine, and III by the reaction of an amino alc. with BzCl. The following I were obtained (R, R’, b.p.°/mm., m.p. of picrate, m.p. of HCl salt, and m.p. of methiodide are given): piperidino, Me, 69°/5, 115°, 214°, 163-4°; piperidino, Et, 68°/1, 122°, 117-17.5°, 160-60.3°; piperidino, Bu, 100-1°/4, 85°, -, 178°; piperidino, PhCH2, 134-5°/1, 137°, 133°, 91-6°; morpholino, Me, 77°/2, 143°, 150.5°, 147.5°; morpholino, Et, 86-7°/4, 163°, 181°, 132-3°; morpholino, Bu, 105.5-106°/3, -, 127-9°, 95-6°; morpholino, PhCH2, 164-5°/5, 143°, 149°, -; pyrrolidino, Me, 72-3°/8, 104°, -, 153°; pyrrolidino, Et, 59-60°/2, 119.5°, 133-3.5°, -; pyrrolidino, Bu, 81-2°/3, 109.5°, -, -; pyrrolidino, PhCH2, 134-5°/1, 159-60°, 139-40°, 156°. The following II were prepared (data as above): piperidino, Me, 72°/2, 164°, 189°, 147-8°; piperidino, Et, 102-3°/5, 131.5°, 169°, -; piperidino, Bu, 124-5°/6, 108-9°, 164.7°, -; piperidino, PhCH2, 149-50°/1, 113°, 193.5°, -; piperidino, Ph, 114-20°/3, -, 192-5°, -; piperidino, CPh3, 171°/1, -, 214°, -; morpholino, Me, 82°/2, 129°, 203°, 151°; morpholino, Et, 108°/6, 108°, 188-9°, -; morpholino, Bu, 131-2°/6, 150°, 173°, 115°; morpholino, PhCH2, 154°/1, 125°, 189-90°, -; pyrrolidino, Me, 76°/5, 147°, 128°, 166°; pyrrolidino, Et, 85°/6, 114°, 146°, -; pyrrolidino, Bu, 106-8°/5, 97°, 74-5°, 115°; pyrrolidino, PhCH2, 145-6°/3, 102°, 152°, 154°. IV (R =pyrrolidino) (V), b3 75°, picrate m. 111-12°, gave a hygroscopic HCl salt. III (R = piperidino) b2 141°; HCl salt m. 184°; methiodide m. 141.5°. The action of the compounds on blood pressure and on respiration was given. II (R = N-piperidino, R’ = CPh3) and V had strong antinicotinic action. The effect of the piperidino and pyrrolidino propionates was increased by quaternization.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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: 2-Chloropyridine 1-oxide, is researched, Molecular C5H4ClNO, CAS is 2402-95-1, about Carbon-13 nuclear magnetic resonance spectra of substituted pyridine N-oxides.Safety of 2-Chloropyridine 1-oxide.

13C NMR spectra of substituted pyridine N-oxides were examined and compared to the spectra of the corresponding free pyridine bases. The N-oxide functionality causes significant shielding at the C-2, C-4, and C-6 positions. This shielding was associated with electron d. donation by the N-oxide functionality to these positions. The N-oxide functionality also caused an enhancement of the substituent α-effect for -NMe2, -OMe, and -NO2 groups.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Quality Control of 3,5-Dimethyl-4-nitropyridine 1-oxide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 3,5-Dimethyl-4-nitropyridine 1-oxide, is researched, Molecular C7H8N2O3, CAS is 14248-66-9, about Electrophilic properties of nitroheterocyclic compounds.. Author is Zieba-Mizgala, Anna; Puszko, Aniela; Regiec, Andrzej; Kuduk-Jaworska, Janina.

Investigation of the reduction potential and calculation of the partition coefficient n-octanol/water allow the assessment of the potential suitability of nitropyridine N-oxide compounds in radiotherapy of cancer. Experiments were carried out using cyclic voltammetry with HMDE as working electrode. The electrode reduction of the investigated compounds is quite irreversible and strongly dependent on pH.

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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

HPLC of Formula: 3235-67-4. 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: 1-Piperidineacetic Acid, is researched, Molecular C7H13NO2, CAS is 3235-67-4, about Glyoxal derivatives. III. Reaction of glyoxal with some secondary amines. Author is Kliegman, Jonathan M.; Barnes, Robert K..

Both 40 and 80% aqueous glyoxal reacted with morpholine in the cold to give 1,1,2,2-tetramorpholinoethane (I) which on vacuum distillation gave 1,1,2-trimorpholinoethane (II), but on boiling the reactions mixture gave 4-(morpholinoacetyl)morpholine (III). III was also obtained by treating II with moist Me2CHOH. I reacted with hydroxy aliphatics to give 1,2-dialkoxy-1,2-dimorpholinoethanes. Piperidine similarly gave piperidinoacetyl-piperidine. PhNHMe reacted with glyoxal to give 1-methyl-3-(N-methyl-N-phenylamino)indole.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Application of 3235-67-4. 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-Piperidineacetic Acid, is researched, Molecular C7H13NO2, CAS is 3235-67-4, about Discovery of N-((1-(4-(3-(3-((6,7-Dimethoxyquinolin-3-yl)oxy)phenyl)ureido)-2-(trifluoromethyl)phenyl)piperidin-4-yl)methyl)propionamide (CHMFL-KIT-8140) as a Highly Potent Type II Inhibitor Capable of Inhibiting the T670I “”Gatekeeper”” Mutant of cKIT Kinase. Author is Li, Binhua; Wang, Aoli; Liu, Juan; Qi, Ziping; Liu, Xiaochuan; Yu, Kailin; Wu, Hong; Chen, Cheng; Hu, Chen; Wang, Wenchao; Wu, Jiaxin; Hu, Zhenquan; Ye, Ling; Zou, Fengming; Liu, Feiyang; Wang, Beilei; Wang, Li; Ren, Tao; Zhang, Shaojuan; Bai, Mingfeng; Zhang, Shanchun; Liu, Jing; Liu, Qingsong.

CKIT kinase inhibitors, e.g., imatinib could induce drug-acquired mutations such as cKIT T670I that rendered drug resistance after chronic treatment. Through a type II kinase inhibitor design approach the authors discovered a highly potent type II cKIT kinase inhibitor compound 35 (CHMFL-KIT-8140), which potently inhibited both cKIT wt (IC50: 33 nM) and cKIT gatekeeper T670I mutant (IC50: 99 nM). Compound 35 displayed strong anti-proliferative effect against GISTs cancer cell lines GIST-T1 (cKIT wt, GI50: 4 nM) and GIST-5R (cKIT T670I, GI50: 26 nM). In the cellular context it strongly inhibited c-KIT mediated signaling pathways and induced apoptosis. In the BaF3-TEL-cKIT-T670I isogenic cell inoculated xenograft mouse model, 35 exhibited dose dependent tumor growth suppression efficacy and 100 mg/kg dosage provided 47.7% tumor growth inhibition (TGI) without obvious toxicity. The authors believe compound 35 would be a good pharmacol. tool for exploration of the cKIT-T670I mutant mediated pathol. in GISTs.

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Isoxazole – Wikipedia,
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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.Kubo, Keiji; Oda, Katsuaki; Kaneko, Tatsuhiko; Satoh, Hiroshi; Nohara, Akira researched the compound: 3,5-Dimethyl-4-nitropyridine 1-oxide( cas:14248-66-9 ).Reference of 3,5-Dimethyl-4-nitropyridine 1-oxide.They published the article 《Synthesis of 2-[[(4-fluoroalkoxy-2-pyridyl)methyl]sulfinyl]-1H-benzimidazoles as antiulcer agents》 about this compound( cas:14248-66-9 ) in Chemical & Pharmaceutical Bulletin. Keywords: benzimidazole fluoroalkoxypyridylmethylsulfinyl preparation antiulcer. We’ll tell you more about this compound (cas:14248-66-9).

Many title compounds (I, R1 = H, F, alkoxy, CF3 or MeSO2, R2 and R4 = H or Me, R3 = CF3, C2F5, HCF2CF2 or CCl3) were synthesized and tested for antisecretory, antiulcer, and cytoprotective activities. Most of these compounds were superior to omeprazole in antisecretory and antiulcer potencies, and especially in protecting the gastric mucosa from ethanol-induced damage. AG-1749 (Iansoprazole) (I, R1 = R4 = H, R2 = Me, R3 = CF3), was selected for further development and clin. evaluation.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem