Tag: M.W:100-200

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 Influence of solvents on intramolecular hydrogen bonds with large proton polarizability, published in 1982-07-31, which mentions a compound: 1127-45-3, mainly applied to hydrogen bond intramol NMR; proton polarizability hydrogen bond NMR, Synthetic Route of C9H7NO2.

A large number of compounds with intramol. hydrogen bonds with great proton polarizability were studied by 1H NMR in solvents of various polarities. With the homoconjugated hydrogen bonds, small changes of the chem. shift of the hydrogen-bonded proton are observed with increasing polarity of the solvent, whereby the signal shifts toward lower field. This effect is explained by increasing removal of the counterions from the homoconjugated hydrogen bonds and thus, by decreasing induced dipole interaction of the counterions and the hydrogen bonds with great proton polarizability. In the case of heteroconjugated hydrogen bonds analogous but much greater shifts are observed They are explained by a shift of the OH···N ⇌ O-···H+N equilibrium to the right-hand side with increasing polarity of the solvent. With hydrogen bonds showing no great proton polarizability these effects do not occur.

If you want to learn more about this compound(8-Hydroxyquinoline 1-oxide)Synthetic Route of C9H7NO2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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: 19777-66-3, is researched, Molecular C3H12Cl2N2, about Optically active derivatives of imidazolines. α-Adrenergic blocking properties, the main research direction is imidazoline stereoisomer preparation adrenergic blocker.SDS of cas: 19777-66-3.

The title compounds I (R and R1 = H, Me, or PhCH2; R2 = 1-naphthylmethyl, PhCH2, or 2,6-dichloroaniline) as salts were prepared from an optically active 1,2-diamine-2HCl and an imino ester HCl, and converted to a stable solid salt. I were evaluated for α-adrenergic activity on rabbit aortic strips. Compared to naphazoline or tolazoline, substitution of a Me or PhCH2 at the 4 position of the imidazoline ring resulted in moderate α-blocking activity with no apparent stereoselectivity with such substitution.

If you want to learn more about this compound((S)-Propane-1,2-diamine dihydrochloride)SDS of cas: 19777-66-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(19777-66-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Name: 8-Hydroxyquinoline 1-oxide. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about 8-Hydroxyquinolines are bactericidal against Mycobacterium tuberculosis. Author is Odingo, Joshua O.; Early, Julie V.; Smith, Jake; Johnson, James; Bailey, Mai A.; Files, Megan; Guzman, Junitta; Ollinger, Juliane; Korkegian, Aaron; Kumar, Anuradha; Ovechkina, Yulia; Parish, Tanya.

There is an urgent need for new treatments effective against Mycobacterium tuberculosis, the causative agent of tuberculosis. The 8-hydroxyquinoline series is a privileged scaffold with anticancer, antifungal, and antibacterial activities. We conducted a structure-activity relationship study of the series regarding its antitubercular activity using 26 analogs. The 8-hydroxyquinolines showed good activity against M. tuberculosis, with min. inhibitory concentrations (MIC90) of <5μM for some analogs. Small substitutions at C5 resulted in the most potent activity. Substitutions at C2 generally decreased potency, although a sub-family of 2-styryl-substituted analogs retained activity. Representative compounds demonstrated bactericidal activity against replicating M. tuberculosis with >4 log kill at 10× MIC over 14 days. The majority of the compounds demonstrated cytotoxicity (IC50 of <100μM). Further development of this series as antitubercular agents should address the cytotoxicity liability. However, the 8-hydroxyquinoline series represents a useful tool for chem. genomics to identify novel targets in M. tuberculosis. If you want to learn more about this compound(8-Hydroxyquinoline 1-oxide)Name: 8-Hydroxyquinoline 1-oxide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1127-45-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-(Bromomethyl)-4-ethylbenzene, is researched, Molecular C9H11Br, CAS is 57825-30-6, about Phenylboronic acid-catalyzed tandem construction of S-S and C-S bonds: a new method for the synthesis of benzyl disulfanylsulfone derivatives from S-benzyl thiosulfonates, the main research direction is benzyl disulfanylsulfone preparation metal free; thiosulfonate benzyl tandem dimerization sulfonylation phenylboronic acid catalyst.Application In Synthesis of 1-(Bromomethyl)-4-ethylbenzene.

A unique phenylboronic acid-catalyzed dimerization-sulfonylation of S-benzyl thiosulfonates has been disclosed. A metal-free tandem construction of S-S and C-S bonds is an operationally simple method to access a wide range of benzyl disulfanylsulfone derivatives I (Ar1 = C6H5, 4-ClC6H5, 1-naphthyl, etc.; Ar2 = C6H5, 4-MeOC6H5, 2-thienyl, etc.) in high to excellent yields. Moreover, the robustness of this tandem transformation has been demonstrated by gram-scale reactions, and a plausible mechanism is also proposed.

If you want to learn more about this compound(1-(Bromomethyl)-4-ethylbenzene)Application In Synthesis of 1-(Bromomethyl)-4-ethylbenzene, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(57825-30-6).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

SDS of cas: 57825-30-6. 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-(Bromomethyl)-4-ethylbenzene, is researched, Molecular C9H11Br, CAS is 57825-30-6, about Design, synthesis and activity evaluation of 9-substituted-2-amino-6-guanidinopurines as acrosin inhibitors. Author is Zhang, Xiao-Meng; Zhu, Ju; Liu, Xue-Fei; Sheng, Chun-Quan; Zheng, Can-Hui; Fu, Xiao-Dan; Song, Yun-Long; Zhou, You-Jun; Lu, Jia-Guo.

Acrosin, a trypsin-like endoprotease, present in the acrosome of spermatozoa, is a promising target for contraceptive agents. Based on the previous homol. modeling and the anal. of the properties of the activity site of human acrosin, a series of 9-substituted-2-amino-6-guanidinopurines were designed and synthesized on a scaffold represented by KF950. The structures of all the title compounds were confined by 1H NMR, MS, IR and elemental anal. Intermediate 5m was determined by single crystal X-ray diffraction anal. The inhibitory activities against acrosin of all target compounds were tested in vitro and all of them exhibited much more inhibitory activities against acrosin, resp., with pos. control, TLCK. Compound 6z exhibited similar inhibitory activities against KF950.

If you want to learn more about this compound(1-(Bromomethyl)-4-ethylbenzene)SDS of cas: 57825-30-6, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(57825-30-6).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Related Products of 13940-83-5. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Binder properties of the metal fluoride-hydrogen fluoride-water system. Author is Sychev, M. M.; Sviderskaya, O. I.; Borisova, V. B.; Lazareva, N. V..

The binding properties of the MFm-HF-H2O system were investigated, where M is Na, K, Mg, Co, Ni, or Zr and m an integer. The systems KF-HF-H2O and ZrF4-HF-H2O had the highest yield strength, showing promising tech. utilization.

If you want to learn more about this compound(Nickel(ii)fluoridetetrahydrate)Related Products of 13940-83-5, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(13940-83-5).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Joergensen, Christian Klixbull; Berthou, Herve published the article 《Photoelectron spectra induced by x-rays of above 600 nonmetallic compounds containing 77 elements》. Keywords: photoelectron spectra inorganic compound; bonding inorganic photoelectron spectra; x ray photoelectron spectra inorganic.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Recommanded Product: 13940-83-5. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:13940-83-5) here.

The photoelectron spectra induced by Al (1486.6 eV) or Mg (1253.6 eV) x-ray excitation of >600 compounds indicate that the chem. shift (dI) of the ionization energy (I) of the inner shells is not only dependent on the oxidation state of a given element, but also on the ligands. Even for a fixed oxidation state, dI was 2-8 eV in a comparative study of all elements which are neither noble gases nor strongly radioactive. However, this conclusion is, to some extent, modified by reproducible pos. potentials on nonconducting samples which were measured at 1-4V in typical cases and compared with the theory for almost ionic cubic crystals and with experiments with mixtures of nonconducting powd. MgF2, BaSO4, and ThF4 and metals such as Au, Tl2O3, and CuS. The widths and highly varying intensities of photoelectron signals are theor. discussed. The d and f shells of transition and post-transition group atoms give relatively intense signals even for I 8-30 eV since the 1486.6-eV photons most readily ionize shells with small average radii. Interesting relations can be established with electron transfer spectra and optical electronegativities. Special satellites occur in Cu(II), La(III) and other lanthanide compounds The adaptation of the electronic d. of the neighbor atoms in the ionized system contribute to dI which cannot be explained exclusively on the basis of fractional at. charges and the Madelung potential.

If you want to learn more about this compound(Nickel(ii)fluoridetetrahydrate)Recommanded Product: 13940-83-5, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(13940-83-5).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Icelli, Orhan; Erzeneoglu, Salih published the article 《The mass attenuation coefficients in some vanadium and nickel compounds》. Keywords: x ray mass attenuation coefficient vanadium nickel compound.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Recommanded Product: 13940-83-5. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:13940-83-5) here.

The mass attenuation coefficients for V2O3, VO2, VF3, NH4VO3, VF4, NiF2, NiCl2, NiCl2.H2O, NiF2.4H2O, NiCl2.6H2O, Ni(ClO4)2.6H2O were measured at x-ray energies 15.746-40.930 keV using a Si(Li) detector. The measured values are compared with the theor. ones calculated using WinXcom.

If you want to learn more about this compound(Nickel(ii)fluoridetetrahydrate)Recommanded Product: 13940-83-5, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(13940-83-5).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Category: quinoxaline. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about A new and facile route for the synthesis of chiral 1,2-diamines and 2,3-diamino acids. Author is Nadir, Upender K.; Krishna, R. Vijaya; Singh, Anamika.

The synthesis of chiral diamines and diamino acids has been achieved from the corresponding N-arylsulfonyl aziridines through reaction with a chiral isocyanate and subsequent hydrolysis of 2-imidazolidinones. The method appears to be general and of wide applicability.

If you want to learn more about this compound((S)-Propane-1,2-diamine dihydrochloride)Category: quinoxaline, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(19777-66-3).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-(Bromomethyl)-4-ethylbenzene, is researched, Molecular C9H11Br, CAS is 57825-30-6, about Design, synthesis and evaluation of 3-(imidazol-1-ylmethyl)indoles as antileishmanial agents. Part II, the main research direction is benzylimidazolylmethylindole preparation antileishmanial agent; indole benzylimidazolylmethyl preparation antileishmanial agent.Formula: C9H11Br.

A new series of 1-benzyl-3-(imidazol-1-ylmethyl)indoles were synthesized according to a previous 3D-QSAR predictive model and assayed for their antiparasitic activity upon Leishmania mexicana promastigotes. The biol. results obtained for these twelve mols. showed an IC50 ranging from 2.3 to 32 μM and mainly illustrated the importance of the hydrophobic parameter in the para-position of the benzyl group. In order to improve the activities of these compounds and to check the potential influence of the electronic parameter on this particular position, a Craig diagram was used to select original electro-donating and lipophilic substituents. Synthesis and biol. evaluation of ten new compounds (IC50 between 2.5 and 5.4 μM) confirmed that only the hydrophobic field is essential for a high level of activity.

If you want to learn more about this compound(1-(Bromomethyl)-4-ethylbenzene)Formula: C9H11Br, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(57825-30-6).

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider