Month: April 2022

Howle, Jerry A.; Gale, Glen R.; Smith, Alayne B. 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 ).Related Products of 15227-42-6. 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 antitumor and antimitotic action of the pyridine-tritiated square-planar Pt complex cis-dichloro(dipyridine)platinum(II) (I) [15227-42-6] seems to depend on the dissociation of 1 or both chlorine atoms from the platinum atom. The resulting cationic, aquated species subsequently forms a bond with nucleic acid. I associate avidly with calf thymus DNA, high mol. weight yeast RNA, and bacterial and yeast tRNA, but not with bovine serum albumin, dextran, or purified erythrocyte membranes. Dialysis of the Pt-nucleic acid complexes in distilled water or NaCl results in loss of a portion of the original radioactivity. The Pt-DNA bond is resistant to dissociation by solubilization in alkali followed by trichloroacetic acid (TCA) precipitation Bonding of I to DNA in vitro is inhibited by NaCl; however, prior alkylation of the DNA with nitrogen mustard does not influence its subsequent bonding with I. I associate with intact Ehrlich ascites tumor cells in vitro at 2.deg. and 37.deg. and resists dissociation by washing with saline or TCA as well as solubilization in alkali followed by re-precipitation with TCA.

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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – 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: cis-Dichlorobis(pyridine)platinum(II), is researched, Molecular C10H10Cl2N2Pt, CAS is 15227-42-6, about Interaction of cis platinum(II) compounds with poly(L-glutamate). A doubly anchored spin-label and a doubly anchored chromophore-label.COA of Formula: C10H10Cl2N2Pt.

The free-radical 4-amino-2,2,6,6-tetramethylpiperidinyl-1-oxy [14691-88-4] yields cis-Pt(ATMPO)2(NO3)2 [64716-94-5], which is used to label poly(L-glutamate) (I), poly(L-aspartate) (II), and poly(L-lysine) (III). Labeling occurs by displacement of nitrate by polymer side chains. EPR spectra of oriented films of labeled I are strongly anisotropic; several arguments suggest that the major cause is g anisotropy. Spectra of solutions, in several solvents, of labeled I are also anisotropic and monitor the helix-coil transition and polymer aggregation. Since monofunctional, side-chain labels show only isotropic motions, Pt must be bifunctionally anchored to adjacent carboxylates, requiring the label to follow backbone segmental motions. With shorter side chains (II) adjacent double anchoring is impossible; with longer side chains (III), flexibility reduces coupling to backbone motion; in each, therefore, spectra are isotropic. Chromophoric compounds, particularly cis-Pt(bipy)(H2O)2][NO3]2 [64800-95-9], are similarly used. Bifunctional attachment is evidenced by the absence of base-induced UV spectral shifts (characteristic of attachment of OH- to Pt) shown by label alone, and by similarity of the spectra of labeled polymer and labeled oxalate. Induced CD appears for α helix in the region of the chromophore π-π* bands; transition to random coil drastically reduces this CD. With extensively labeled polymer differences in the course of the helix-coil transition as monitored by CD in the backbone region with that monitored in the chromophore region show that the label stabilizes its attached helical residue. A study of Corey-Pauling-Koltun models and extant theories suggests that the induced CD arises by coupling of the carboxylate π-π* and the bound chromophore 1B1 elec. transition moments.

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

Recommanded Product: 1-Bromoundecane. 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-Bromoundecane, is researched, Molecular C11H23Br, CAS is 693-67-4, about The Guanidine-Promoted Direct Synthesis of Open-Chained Carbonates. Author is Shang, Yuhan; Zheng, Mai; Zhang, Haibo; Zhou, Xiaohai.

In order to reduce CO2 accumulation in the atm., chem. fixation methodologies were developed and proved to be promising. In general, CO2 was turned into cyclic carbonates by cycloaddition with epoxides. However, the cyclic carbonates need to be converted into open-chained carbonates by transesterification for industrial usage, which results in wasted energy and materials. Herein, a process catalyzed by tetramethylguanidine (TMG) to afford linear carbonates directly is reported. This process is greener and shows potential for industrial applications.

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Picolinamide( cas:1452-77-3 ) is researched.Reference of Picolinamide.Jadresko, Dijana; Markovic, Berislav; Medvidovic-Kosanovic, Martina; Matkovic-Calogovic, Dubravka; Szechenyi, Aleksandar; Pockaj, Marta; Balic, Tomislav; Popovic, Zora published the article 《Structural and electrochemical properties of two novel CdX2 (X = Br, I) picolinamide complexes》 about this compound( cas:1452-77-3 ) in Polyhedron. Keywords: cadmium bromine iodine picolinamide complex preparation thermal stability electrochem; crystal structure cadmium bromine iodine picolinamide complex. Let’s learn more about this compound (cas:1452-77-3).

Two novel discrete cadmium(II) complexes, namely [CdBr2(pia)2] (1) and [CdI2(pia)2] (2) were prepared by reactions of aqueous solutions of CdX2 (X = Br, I) salts with picolinamide (pia) in the 2:1 ligand to metal stoichiometric ratio. Both compounds were characterized by elemental anal., IR-spectroscopy, TG/DSC analyses and electrochem. methods. The electrochem. characteristics of both ligand (pia) and prepared complexes were studied by cyclic and (cyclic) square-wave voltammetry, on a static mercury drop electrode (SMDE), in aqueous media over a wide pH range. The mol. and crystal structure of the compounds was determined by the single crystal X-ray diffraction method. X-ray structure anal. of 1 and 2 have shown that the compounds are isostructural with minor differences in the bond angles of the coordination sphere. In both compounds the Cd(II) ion is coordinated by two halide atoms and two mutually orthogonal picolinamide ligands that act as N,O-chelators in a distorted octahedral arrangement. In the crystal structure, the mols. of 1 and 2 are primarily linked via strong head-to-head amide hydrogen bond interactions forming dimers. In 1 the adjacent dimers are connected via N-H···Br hydrogen bonds and offset face to face π···π interactions that involve pyridine rings, while in the structure of 2, the dimers are connected via C-H···O, C-H···N and N-H···I hydrogen bonds into the final 3D structure. The intermol. interactions in both crystal structures were further studied by Hirshfeld surface anal. Electrochem. anal. of 2-picolinamide indicates the irreversible nature of its electro-reduction reaction on SMDE at pH 2. To provide better insight into the redox mechanism and electrokinetic properties of 2-picolinamide, the study of the effect of signal frequency on CSWV response was carried out, too. The electrochem. reduction of complex 2 involves two electron transfer reactions at -0.55 V and -0.83 V, indicating two redox active centers in the mol., while complex 1 appears to be apparently electro-inactive in the studied potential range.

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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 Manipulating Cocrystal Size and Morphology using a Combination of Temperature Cycling and Additives, the main research direction is cocrystal size morphol manipulation temperature cycling additive combination.Related Products of 1452-77-3.

A cooling crystallization of HOBz and isonicotinamide in EtOH yields the 1:1 cocrystal with an extreme needle-like morphol. with an initial mean aspect ratio of ~10 and a size of ~64μm. The use of suspension temperature cycling in combination with tailor-made additives alleviates such extreme needle-like morphols. and increases the average particle size of this cocrystal material. Temperature cycling of the cocrystal suspensions in EtOH alone reduces the mean aspect ratio from 10 to 3.3 while it increases the average crystal size from 64 to 450μm. The further addition of low concentrations of benzamide or nicotinamide suppresses the growth rate at the tip of the needle even more, resulting in a more favorable equant morphol. An iterative mechanism in which additives are incorporated in the lattice structure and released during the temperature increase in each cycle is proposed. Thus, the incorporation of an additive at the normally fast growing and potential needle tips and its release during the temperature increase part of the cycle effectively makes an additive action catalytic. The simultaneous use of temperature cycling and tailor-made additives offers a new and effective approach for the elimination of unsatisfactory needle-like crystal morphologies and a small crystal size during the production of a pharmaceutical cocrystal material. The simultaneous use of temperature cycling and tailor-made additives offers a new and effective approach for morphol. control of a pharmaceutical cocrystal.

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

Synthetic Route of C10H10Cl2N2Pt. 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 Mass spectrometry of platinum(II) complexes. Comparison of cis and trans isomers. Fragmentation and rearrangement pathways. Author is Haake, P.; Mastin, S. H..

The mass spectra of 8 pairs of cis and trans isomers of PtL2X2 (L=NH3, pyridine PEt3, or PPh3; X=Cl, Br, or I) are presented and discussed. Two chelates, Pt(bipy)Cl2 and Pt(dpm)Cl2(dpm=di-α-pyridylmethane), are also included. The most significant results are: (1) parent ions can be observed for almost all these relatively involatile coordination compounds; (2) most ligand fragmentations and rearrangements occur with ligand-metal bonds intact; (3) some rearrangements appear to involve the metal; (4) cis and trans isomers of phosphine complexes give different fragmentation patterns; (5) spectra of chelates differ considerably from the spectra of analogous nonchelates; (6) in Pt(NH3)2Cl2 and Pt(py)2Cl2, little or no difference is observed in the spectra of cis and trans isomers after electron impact. Therefore, excitation to a tetrahedral state may take place.

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1-Bromoundecane( cas:693-67-4 ) is researched.Recommanded Product: 693-67-4.Buniya, Meaad K.; Mohammad, Abdulkarim-Talaq; Al-Majidi, Suaad Mohammed Husain published the article 《Antibacterial studies of some novel Schiff base compounds》 about this compound( cas:693-67-4 ) in Materials Today: Proceedings. Keywords: aminomethyl benzyliminomethyl phenyl alkoxybenzoate Schiff base preparation antibacterial. Let’s learn more about this compound (cas:693-67-4).

A new series of 4-(((4-(aminomethyl)benzyl)imino)methyl)Ph 4-(alkyloxy)benzoates I [R = n-hexyl, n-octyl, n-tetradecyl, etc.] were synthesized and characterized. The condensation reaction of 4-formylphenyl 4-(alkyloxy)benzoate with 1,4-bis(aminomethyl)benzene yielded the title Schiff base compounds I. Titled compounds I containing a terminal alkoxy chain range from n = 6-14 carbon atoms. FT-IR and multinuclear-NMR were used to determine the structures of target compounds I. Compounds I were subjected antimicrobial studies found to have significant activity against the selected bacterial under study.

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

Application of 693-67-4. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-Bromoundecane, is researched, Molecular C11H23Br, CAS is 693-67-4, about Reactivity Ratios of MMA and N,N-Dimethyl-N-{2-[(2-methylprop-2-enoyl)oxy]ethyl}undecane-1-aminium Bromide in Thermal and UV Initiation Copolymerization. Author is Liu, Yixian; Xu, William Z.; Charpentier, Paul A..

Reactivity ratios for the copolymerization of Me methacrylate (MMA) and a quaternary ammonium compound (QAC) N,N-dimethyl-N-{2-[(2-methylprop-2-enoyl)oxy]ethyl}undecane-1-aminium bromide (dMEMUABr) were measured for the first time by using a thermal initiator azobisisobutyronitrile (AIBN) in deuterated DMSO (DMSO-d6) and deuterated chloroform (CDCl3) and a photo initiator 2-hydroxy-2-methylpropiophenone (HMP) under UV irradiation in CDCl3, resp. The consumption profiles for monomer in the thermal initiation copolymerization were monitored by in-situ 1H NMR while the data were analyzed by the Meyo-Lewis, Kelen-Tudos, and Meyer-Lowry methods, showing that the reactivity ratio of dMEMUABr is lower than that of MMA in DMSO-d6 but much higher in CDCl3. The significantly different reactivity ratios of dMEMUABr in DMSO-d6 from that in CDCl3 are attributed to micelle formation. These findings enable addnl. flexibility in the design and development of antimicrobial poly(MMA-co-dMEMUABr) coatings with desired copolymer chain sequence.

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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 15227-42-6, is researched, SMILESS is [Cl-][Pt+2]([N]1=CC=CC=C1)([Cl-])[N]2=CC=CC=C2, Molecular C10H10Cl2N2PtJournal, Article, Research Support, Non-U.S. Gov’t, Research Support, U.S. Gov’t, P.H.S., Cancer Research called Activation of the trans geometry in platinum antitumor complexes: a survey of the cytotoxicity of trans complexes containing planar ligands in murine L1210 and human tumor panels and studies on their mechanism of action, Author is Farrell, Nicholas; Kelland, Lloyd R.; Roberts, John D.; Van Beusichem, Marijo, the main research direction is trans platinum antitumor complex resistance structure.HPLC of Formula: 15227-42-6.

The cytotoxicity of transplatinum complexes of structural formula trans-[PtCl2(L)L’)] {L = L’ = pyridine or thiazole, or L = quinoline (R’ = methyl; R” = Me, Ph or CH2phenyl) and L’ = R’R”SO] has been studied in murine L1210 and human tumor cell lines. The results confirm previous observations that use of a sterically hindered planar ligand greatly enhances cytotoxicity, in comparison to trans-[PtCl2(NH3)2], such that in some cases cytotoxicity equivalent to that of the clin. used agent cisplatin [cis-{PtCl2(NH3)2]] is obtained. Results from both the panel of human ovarian carcinoma cell lines and the National Cancer Institute screening panel confirm a different pattern of cytotoxicity, with respect to cisplatin. The new trans-platinum complexes are also non-cross-resistant with cisplatin in both murine and human (human ovarian carcinoma panel) tumor cell lines. Preliminary mechanistic studies using both cis- and trans-[PtCl2(pyridine)2] in L1210 cells have been carried out, to delineate the reasons for both the dramatically enhanced cytotoxicity and the lack of cross-resistance with the clin. used agents. Intracellular uptake is enhanced for pyridine relative to ammine (NH3) complexes. The pyridine complexes also inhibit DNA synthesis, implying a role for DNA binding in their mechanism of action. Binding of the pyridine complexes to calf thymus DNA is, however, significantly less than for the analogous ammine complexes. The presence of trans-pyridine ligands results in steric hindrance, which retards the rate of reaction of trans-[PtCl2(pyridine)2], relative to trans[PtCl2(NH3)2], with other important biomols. such as glutathione. The results point to a potential new class of platinum antitumor complexes acting by a new mechanism and with activity complementary to agents such as cisplatin.

Compound(15227-42-6)HPLC of Formula: 15227-42-6 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(cis-Dichlorobis(pyridine)platinum(II)), if you are interested, you can check out my other related articles.

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

Related Products of 693-67-4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-Bromoundecane, is researched, Molecular C11H23Br, CAS is 693-67-4, about Facilitated transport of copper(II) across polymer inclusion membrane with triazole derivatives as carrier. Author is Gajda, Bernadeta; Plackowski, Radoslaw; Skrzypczak, Andrzej; Bogacki, Mariusz B..

This study investigates copper(II) ion transport through a polymer inclusion membrane (PIM) containing 1-alkyl-1,2,4-triazole (n = 8, 9, 10, 11, 12, 14), o-nitrophenyl octyl ether as the plasticizer and cellulose triacetate as the polymer matrix. The feeding phase was a solution of 0.1 mol/dm3CuCl2 and an equimolar (0.1 mol/dm3) mixture of copper, nickel, and cobalt chlorides with varying concentrations of chloride anions (from 0.5 to 5.0 mol/dm3) established with NaCl. The receiving phase was demineralized water. The flow rate of the source and receiving phases through the membrane module was within the range from 0.5 cm3/min to 4.5 cm3/min. The tests were carried out at temperatures of 20, 30, 40 and 50°C. Transport of NaCl through the membrane was excluded for the duration of the test. It was noted that the flow rate through the membrane changes depending on the length of the carbon chain in the alkyl substituent from 16.1μmol/(m2s) to 1.59μmol/(m2s) in the following order: C8 > C9 > C10 > C11 > C12 > C14. The activation energy was 71.3 ± 3.0 kJ/mol, indicating ion transport through the PIM controlled with a chem. reaction. Results for transport in case of the concurrent separation of copper(II), nickel(II), and cobalt(II) indicate a possibility to sep. them in a selective manner.

Compound(693-67-4)Related Products of 693-67-4 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(1-Bromoundecane), if you are interested, you can check out my other related articles.

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