Month: April 2022

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: cis-Dichlorobis(pyridine)platinum(II), is researched, Molecular C10H10Cl2N2Pt, CAS is 15227-42-6, about Activation of the trans geometry in platinum antitumor complexes. Synthesis, characterization, and biological activity of complexes with the planar ligands pyridine, N-methylimidazole, thiazole, and quinoline. Crystal and molecular structure of trans-dichlorobis(thiazole)platinum(II), the main research direction is antitumor platinum chloro nitrogen donor complex; crystal structure platinum chloro thiazole complex.Reference of cis-Dichlorobis(pyridine)platinum(II).

The presence of planar ligands in trans-[PtCl2(py)2] greatly enhances the cytotoxicity of such species, with respect both to their corresponding cis isomer and also to trans-[PtCl2(NH3)2]. The cytotoxicity of trans-[PtCl2(py)2] in murine tumor cell lines is equivalent to the anticancer drug cisplatin, cis-[PtCl2(NH3)2]. The generality of this effect was studied for a range of structures with planar ligands of formula trans-[PtCl2(L)(L’)]. Three distinct series were examined-(1) L = L’ = py, N-methylimidazole (N-MeIm), and thiazole (Tz), (2) L = quinoline (quin), L’ = MeRSO where (R = Me, CH2Ph, Ph), and (3) L = quinoline, L’ = NH3. The synthesis and chem. characterization of all new complexes are described. An x-ray crystal structure determination for trans-[PtCl2(Tz)2] confirmed the geometry with N-bound thiazole. The crystals are monoclinic, space group C2/c, a 8.088(3), b 14.964(4), c 8.847(2) Å, β 99.50(2), Z = 4, R = 0.0545, Rw = 0.0655. Pt has the expected square planar coordination with l(Pt-Cl) = 2.300(5) Å and l(Pt-N) = 2.024(18) and 2.077(17) Å. Bond angles are normal with N(1)-Pt-N(2) = 180.0(1)°, N(1)-Pt-Cl(1) = 90.4(1)°, and N(2)-Pt-Cl(1A) = 89.6(1)°. The intensity data were collected with MoKα radiation with λ = 0.71073 Å. The thiazole rings are not coplanar but slightly tilted to each other at an angle of 14.3°. The dihedral angles between the Pt coordination plane and the thiazole rings are 119.3 and 105.0°. The biol. studies confirm the generality of activation of the trans geometry using planar ligands. Cytotoxicity tests in murine leukemia (L1210) cell lines both sensitive and rendered resistant to cisplatin show that the complexes show equivalent cytostatic activity to that of cisplatin. The activity is an order of magnitude greater than trans-[PtCl2(NH3)2]. The cytotoxicity is further marked by consistent activity in the cisplatin-resistant cell line. Contrary to the well-established but empirical structure-activity relationships, the trans geometry can give platinum complexes with cytotoxicity equivalent to that of the analogous cis isomer. The results point to a further source of platinum antitumor complexes acting by a different mol. mechanism to cisplatin with potential for antitumor activity complementary to that of the clin. used drug.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Kukushkin, Yu. N.; Sedova, G. N.; Belyaev, A. N.; Konovalov, L. V. published an article about the compound: cis-Dichlorobis(pyridine)platinum(II)( cas:15227-42-6,SMILESS:[Cl-][Pt+2]([N]1=CC=CC=C1)([Cl-])[N]2=CC=CC=C2 ).Formula: C10H10Cl2N2Pt. 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:15227-42-6) through the article.

The thermal behavior of onium chloroplatinates of the type (AH)2[PtCl6] (A = NH3, MeNH2, 0.5 en, piperidine, py, γ-picoline, NH2Ph, p-toluidine, quinoline, 0.5 2,2′-bipyridine) was studied by derivatog. and IR spectral anal. The heating of solid (AH)2[PtCl6] led to the formation of trans-PtL2Cl4 (L = py, γ-picoline) and cis-PtQ2Cl4 (Q = p-toluidine) and subsequently to the formation of cis-PtA2Cl2. When (AH)2[PtCl6] (A = piperidine) was heated (AH)2[PtCl4] was formed. These results were compared with those for the corresponding palladates.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Magnetically enhanced polymersupported ceria nanocatalysts for the hydration of nitriles, the main research direction is magnetite nitrile polystyrene ceria nanocatalyst hydration heterogeneous catalysis.COA of Formula: C6H6N2O.

The heterogeneous catalysis of the hydration of nitriles to amides is a process of great industrial relevance in which cerium(IV) oxide (also referred to as ceria) has shown an outstanding catalytic performance. The use of non-supported ceria nanoparticles is related to difficulties in the purification of the product and the recovery and recyclability of the catalyst. Therefore, in this work, ceria nanoparticles are supported on a polymer matrix either by synthesizing polymer particles by so-called Pickering miniemulsions while using ceria nanoparticles as emulsion stabilizers or, as a comparison, by in-situ crystallization on preformed polymer particles. The former strategy presents significant advantages over the latter in terms of time and consumption of resources, and it facilitates an easier scale-up of the process. In both strategies, the incorporation of a magnetoresponsive core within the polymer matrix allows the recovery and the recycling of the catalyst by simple application of a magnetic field and offers an enhancement of the catalytic efficiency.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Synthetic Route of C10H10Cl2N2Pt. 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: cis-Dichlorobis(pyridine)platinum(II), is researched, Molecular C10H10Cl2N2Pt, CAS is 15227-42-6, about Bis(pentafluorophenyl) complexes of palladium(II) and of platinum(II). Author is Uson, R.; Fornies, J.; Gimeno, J.; Espinet, P.; Navarro, R..

The preparation of 8 bis(pentafluorophenyl) complexes of Pd(II) and of Pt(II) with monodentate and bidentate N-donor ligands is described together with a preparation of a Pd(II) complex of 1,2-bis(diphenylphosphino)ethane. Assignments of cis or trans configuration are discussed which depend upon the splitting or disappearance of certain bands in ir.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – 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: 1452-77-3, is researched, Molecular C6H6N2O, about Conceptual design, environmental, and economic evaluation of direct copolymerization process of carbon dioxide and 1,4-butanediol, the main research direction is carbon dioxide butanediol copolymerization.Synthetic Route of C6H6N2O.

The routes to convert CO2 into environmentally benign materials have attracted wide attentions. In this work, an emerging process to produce poly(butylene carbonate) (or PBC) from direct copolymerization of carbon dioxide and 1,4-butanediol is firstly simulated with analyses on the CO2 emission ratio (CO2-e, in kg-CO2/kg-PBC) and yearly unit manufacturing cost of product (YUMC, in USD/kg). In order to address the issues associated with large amount of solvents used in the lab scale, two proposed scenarios including the reduction of solvent amount, and heat integration by vapor recompression cycle (VRC) were simulated. It is found that CO2-e is reduced by 82.0% (from 30.06 to 5.42) when the solvent amount is reduced to 10%, and another 19.9% reduction in CO2-e (to 4.34) when applying the VRC. YUMCs are reduced by ca. 68% for both proposed scenarios (from 5.62 to ca. 1.8). The findings reported in this study may prove informative for developing CO2 conversion technologies from lab scale to industrial scale.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Shuai, Xiaomin; Cai, Zhiqiang; Zhao, Xinyu; Chen, Yujie; Zhang, Qian; Ma, Ziwei; Hu, Junjie; Sun, Tao; Hu, Shaoqiang published the article 《A new stationary phase for capillary gas chromatography: Calix[4]resorcinarene functionalized with imidazolium cationic units》. Keywords: capillary gas chromatog stationary phase imidazolium functionalized.They researched the compound: 1-Bromoundecane( cas:693-67-4 ).Reference of 1-Bromoundecane. 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:693-67-4) here.

A novel calix[4]resorcinarene-based ionic liquid (C4RA-2IL) was synthesized, structurally characterized, and statically coated on capillary column as stationary phase for capillary gas chromatog. (GC). The column efficiency of the C4RA-2IL column is 3345 plates m-1, which are determined by n-dodecane at 120 °C. Based on its McReynolds constants, the C4RA-2IL column showed moderate polarity. Particularly, the C4RA-2IL column show high separation performance for a wide range of analytes and some difficult separation of meta/para-isomers. Moreover, it exhibited excellent selectivity for critical aromatic isomers of chloroaniline, bromaniline, iodoaniline, toluidine and xylidine isomers and shows advantageous separation capability over the com. polysiloxane stationary phase. This work presents a promising future of calixarene-based ionic liquid as a new type of stationary phase in GC separations

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

HPLC of Formula: 15227-42-6. 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: cis-Dichlorobis(pyridine)platinum(II), is researched, Molecular C10H10Cl2N2Pt, CAS is 15227-42-6, about The investigation of platinum(II) complexes with adenine, adenosine and 2-aminopyrimidines. Author is Stetsenko, A. I.; Dmitrieva, E. S.; Yakovlev, K. I..

[Pt2(NH3)4Cl2L]Cl2 (L = adenine, adenosine) were prepared by the addition of ligand to cis-[Pt(NH3)2Cl2] solution [Pt(NH3)2L](NO3)2 were obtained by adding L to cis-[Pt(NH3)2(H2O)2](NO3)2 solution 2-Aminopyrimidine (L1) and 2-amino-4-phenylpyrimidine (L2) reacted with aqueous K2[PtCl4] to yield trans-[PtL12Cl2] and trans-[PtL22Cl2], resp. The cis-[PtA2L12]Cl2 (A = NH3, pyridine, 0.5 ethylenediamine) were obtained by the substitution reaction of cis-[PtA2Cl2] with 2-aminopyrimidine. The cis-[PtA2(H2O)2](NO3)2 reacted with 2-aminopyrimidine to afford cis-[PtA2L12](NO3)2 and cis-[PtA2L1](NO3)2 (A = NH3, 0.5 ethylenediamine), depending on the stoichiometric ratios of the reactants.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Quality Control of cis-Dichlorobis(pyridine)platinum(II). Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: cis-Dichlorobis(pyridine)platinum(II), is researched, Molecular C10H10Cl2N2Pt, CAS is 15227-42-6, about Chemical assembling of silica surface using a reaction of catalytic hydrosilylation. Author is Vekki, D. A.; Kuchaev, E. A..

Chem. assembling of the silica surface modified by dimethylchlorosilane was performed by the catalytic hydrosilylation of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, α-Me styrene, acetophenone, allyl Bu and allyl glycidyl ethers with dimethylchlorosilane. The effect of the nature of complexes of platinum, palladium, rhodium and ruthenium on the parameters of hydrosilylation was studied. It was shown that the maximum rate of hydrosilylation was observed in the reaction with allyl glycidyl ether, and min., with α-methylstyrene; the most effective catalyst of hydrosilylation was [Rh(CO)2(acac)].

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Name: Picolinamide. 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: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Dipicolinamide and isophthalamide based fluorescent chemosensors: Recognition and detection of assorted analytes.

A review. This perspective focuses on a variety of fluorescent receptors based on dipicolinamide and isophthalamide groups and their significant roles in the mol. recognition, sensing and detection of assorted analytes ranging from metal ions, anions, neutral mols., drugs and explosives. Both the “”turn-on”” and “”turn-off”” nature of sensing highlights noteworthy applications in many fields encompassing biol., medicinal, environmental and anal. disciplines.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Hall, Matthew D.; Daly, Helen L.; Zhang, Jenny Z.; Zhang, Mei; Alderden, Rebecca A.; Pursche, Daniel; Foran, Garry J.; Hambley, Trevor W. published the article 《Quantitative measurement of the reduction of platinum(iv) complexes using X-ray absorption near-edge spectroscopy (XANES)》. Keywords: platinum complex ovarian cancer cytotoxic.They researched the compound: cis-Dichlorobis(pyridine)platinum(II)( cas:15227-42-6 ).Synthetic Route of C10H10Cl2N2Pt. 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:15227-42-6) here.

The platinum(ii) drugs cisplatin, carboplatin and oxaliplatin are usefully employed against a range of malignancies, but toxicities and resistance have spurred the search for improved analogs. This has included investigation of the platinum(iv) oxidation state, which provides greater kinetic inertness. It is generally accepted that Pt(iv) complexes must be reduced to Pt(ii) for activation. As such, the ability to monitor reduction of Pt(iv) complexes is critical to guiding the design of candidates, and providing mechanistic understanding. Here we report in full that the white line height of X-ray absorption near-edge spectra (XANES) of Pt complexes, normalized to the post-edge min., can be used to quant. determine the proportion of each oxidation state in a mixture A series of Pt(iv) complexes based on the Pt(ii) complexes cisplatin and transplatin were prepared with chlorido, acetato or hydroxido axial ligands, and studies into their reduction potential and cytotoxicity against A2780 human ovarian cancer cells were performed, demonstrating the relationship between reduction potential and cytotoxicity. Anal. of white line height demonstrated a clear and consistent difference between Pt(ii) (1.52 ± 0.05) and Pt(iv) (2.43 ± 0.19) complexes. Reduction of Pt(iv) complexes over time in cell growth media and A2780 cells was observed by XANES, and shown to correspond with their reduction potentials and cytotoxicities. We propose that this method is useful for monitoring reduction of metal-based drug candidates in complex biol. systems.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem