Month: April 2022

Synthetic Route of C10H10Cl2N2Pt. 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 Microcalorimetric studies of the thermal decomposition of ammonia-halide and amine-halide complexes of platinum(II), [Pt(NH2R)2X2]. Author is Al Takhin, Ghassan; Skinner, Henry A.; Zaki, Ahmed A..

The standard heats of formation of the crystalline compounds [PtL2X2] [L = NH2R (R = H, Me, CHMe2, Bu, Et, Pr, CH2CHMe2), en, pyridine; X = Cl, Br, I] were derived from the enthalpies of thermal decomposition of their cis isomers at elevated temperatures The enthalpy of sublimation (ΔHsub) of [PtL2Cl2] (L = pyridine) is estimated as 170 kJ/mol, which gives an average pyridine-Pt bond-dissociation enthalpy of 122 kJ/mol in the gas phase. For other amine ligands, the bond-dissociation enthalpy is less than for the pyridine complex, falling to a min. of 97 kJ/mol for NH3. These imply sublimation heats of 270-300 kJ/mol in the Cl complexes.

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Recommanded Product: Picolinamide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Phase Transfer Ceria-Supported Nanocatalyst for Nitrile Hydration Reaction. Author is Gupta, Nikitra N.; Punekar, Amrin S.; Raj, Karthik Raja E. K.; Ghodekar, Medha M.; Patil, Vipul S.; Gopinath, Chinnakonda S.; Raja, Thirumalaiswamy.

The present study elaborates the catalytic effect of rare-earth metal oxides (Sm2O3 and La2O3) over ceria as a support phase transfer catalyst. The synthesized catalysts have been subjected to different characterization techniques, such as field-emission SEM, high-resolution transmission electron microscopy, powder X-ray diffraction, N2 adsorption-desorption (BET surface anal.), temperature-programmed desorption study (NH3/CO2-TPD), Fourier transform IR, Raman anal., and XPS to get better insights into the catalytic activity of the catalysts for hydration of nitrile.

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Sun, Han-Li; Liu, Da-Qi; Wang, Jun-Jie; Niu, Dawen; Zhu, Rong published an article about the compound: 1-Bromoundecane( cas:693-67-4,SMILESS:CCCCCCCCCCCBr ).Application In Synthesis of 1-Bromoundecane. 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:693-67-4) through the article.

In the pursuit of creating macromols. with controlled mol. weight, sequence, and end groups, condensation polymerization remains an underexploited synthetic tool because of its intrinsic step-growth nature. Introducing chain-growth pathways into condensation polymerization calls for highly efficient chemistries that effect the challenging differentiation between functional groups of the same type present in monomers and polymers. Here, we address this challenge by a catalyst bifurcation strategy that enables a copper-catalyzed chain-growth condensation polymerization Using a copper(I) arylacetylide as an initiator/precatalyst along with a phosphine ligand, polydiynes of controllable mol. weights and end groups are synthesized from readily available propargyl carbonates, including a block copolymer. This method provides a new chain-growth access to functional acetylenic polymers, a class of useful materials that have been obtained essentially by step-growth methods to date. This work demonstrates the power of dual-role transition metal catalysis in accomplishing unusual selectivity in organic synthesis.

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Recommanded Product: 3-(2,5-Dichloropyrimidin-4-yl)-1-(phenylsulfonyl)-1H-indole. 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: 3-(2,5-Dichloropyrimidin-4-yl)-1-(phenylsulfonyl)-1H-indole, is researched, Molecular C18H11Cl2N3O2S, CAS is 882562-40-5, about Discovery of SY-5609: A Selective, Noncovalent Inhibitor of CDK7. Author is Marineau, Jason J.; Hamman, Kristin B.; Hu, Shanhu; Alnemy, Sydney; Mihalich, Janessa; Kabro, Anzhelika; Whitmore, Kenneth Matthew; Winter, Dana K.; Roy, Stephanie; Ciblat, Stephane; Ke, Nan; Savinainen, Anneli; Wilsily, Ashraf; Malojcic, Goran; Zahler, Robert; Schmidt, Darby; Bradley, Michael J.; Waters, Nigel J.; Chuaqui, Claudio.

CDK7 has emerged as an exciting target in oncol. due to its roles in two important processes that are misregulated in cancer cells: cell cycle and transcription. This report describes the discovery of SY-5609, a highly potent (sub-nM CDK7 Kd) and selective, orally available inhibitor of CDK7 that entered the clinic in 2020 (ClinicalTrials.gov Identifier: NCT04247126). Structure-based design was leveraged to obtain high selectivity (>4000-times the closest off target) and slow off-rate binding kinetics desirable for potent cellular activity. Finally, incorporation of a phosphine oxide as an atypical hydrogen bond acceptor helped provide the required potency and metabolic stability. The development candidate SY-5609 displays potent inhibition of CDK7 in cells and demonstrates strong efficacy in mouse xenograft models when dosed as low as 2 mg/kg.

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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: 1-Bromoundecane, is researched, Molecular C11H23Br, CAS is 693-67-4, about Synthesis and Microbiological Properties of Novel Bis-Quaternary Ammonium Compounds Based on Biphenyl Spacer.Quality Control of 1-Bromoundecane.

Novel gemini (tail-head-spacer-head-tail) bis-quaternary ammonium compounds (bis-QACs) I (Hal = Cl, Br, I; n = 7, 8, 9, etc.) with a biphenyl spacer between two pyridinium heads were synthesized and compared with commonly used antiseptics such as benzalkonium chloride (BAC) and chlorhexidine digluconate (CHG). The series of compounds showed high inhibitory activity against five bacterial strains and two fungi. The compounds, which contain C8H17-C10H21 aliphatic tails were best within the series. A counterion change does not affect MIC in general. Cytotoxicity on human embryonic kidney cells and haemolysis were also investigated. Among the bis-QACs, cytotoxic effect was lower for I (Hal = Br; n = 12), which is the closest structural analog of BAC.

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Tetrahydroisoquinoline – Wikipedia,
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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-Bromoundecane(SMILESS: CCCCCCCCCCCBr,cas:693-67-4) is researched.Electric Literature of C4H10O2.Br2Ni. The article 《Catalytic Asymmetric Fluorination of Copper Carbene Complexes: Preparative Advances and a Mechanistic Rationale》 in relation to this compound, is published in Chemistry – A European Journal. Let’s take a look at the latest research on this compound (cas:693-67-4).

The Cu-catalyzed reaction of substituted α-diazoesters with fluoride gives α-fluoroesters with ee values of up to 95%, provided that chiral indane-derived bis(oxazoline) ligands were used that carry bulky benzyl substituents at the bridge and moderately bulky iso-Pr groups on their core. The apparently homogeneous solution of CsF in C6F6/hexafluoroisopropanol (HFIP) is the best reaction medium, but CsF in the biphasic mixture CH2Cl2/HFIP also provides good results. DFT studies suggest that fluoride initially attacks the Cu- rather than the C-atom of the transient donor/acceptor carbene intermediate. This unusual step is followed by 1,2-fluoride shift; for this migratory insertion to occur, the carbene must rotate about the Cu-C bond to ensure orbital overlap. The directionality of this rotatory movement within the C2-sym. binding site determines the sense of induction. This model is in excellent accord with the absolute configuration of the resulting product as determined by x-ray diffraction using single crystals of this a priori wax-like material grown by capillary crystallization

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: D-Alanine methylamide hydrochloride( cas:61302-99-6 ) is researched.Formula: C4H11ClN2O.Crisma, M.; Fasman, G. D.; Balaram, H.; Balaram, P. published the article 《Peptide models for β-turns. A circular dichroism study》 about this compound( cas:61302-99-6 ) in International Journal of Peptide & Protein Research. Keywords: peptide beta turn conformation CD. Let’s learn more about this compound (cas:61302-99-6).

The CD spectra of β-turn model peptides PhCH2O2C-Aib-Pro-Aib-Pro-OMe (I, Aib = NHCMe2CO), Piv-Pro-Aib-NHMe (II, Piv = Me3CCO), Piv-Pro-D-Ala-NHMe (III), and Piv-Pro-Val-NHMe (IV) were examined in methanol, hexafluoroisopropanol, and cyclohexane. Type I and Type II β-turns were observed for I and II, resp., in the solid state, while the Pro-D-Ala sequence adopts a Type II β-turn in a related peptide crystal structure. A class C spectrum was observed for I in various solvents, suggesting a variant of a Type I (III) structure. The Type II β-turn is characterized by a CD spectrum having two pos. CD bands at ∼230 nm and ∼202 nm, a feature observed in III in cyclohexane and methanol and for II in methanol. II exhibits solvent-dependent CD spectra, which may be rationalized by considering Type II, III and V reverse turn structures. IV adopts non-β-turn structures in polar solvents, but exhibits a class B spectrum in cyclohexane suggesting a population of Type I β-turns.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of the Taiwan Institute of Chemical Engineers called Conceptual design, environmental, and economic evaluation of direct copolymerization process of carbon dioxide and 1,4-butanediol, Author is Yu, Yueh-Cheng; Wang, Ting-Ya; Chang, Li-Hsuan; Wu, Pei-Jhen; Yu, Bor-Yih; Yu, Wen-Yueh, which mentions a compound: 1452-77-3, SMILESS is O=C(N)C1=NC=CC=C1, Molecular C6H6N2O, Product Details of 1452-77-3.

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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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.Inuki, Shinsuke; Hirata, Natsumi; Kashiwabara, Emi; Kishi, Junichiro; Aiba, Toshihiko; Teratani, Toshiaki; Nakamura, Wataru; Kojima, Yoshimi; Maruyama, Toru; Kanai, Takanori; Fujimoto, Yukari researched the compound: 1-Bromoundecane( cas:693-67-4 ).Recommanded Product: 1-Bromoundecane.They published the article 《Polar functional group-containing glycolipid CD1d ligands modulate cytokine-biasing responses and prevent experimental colitis》 about this compound( cas:693-67-4 ) in Scientific Reports. Keywords: SAR glycolipid ligand polar functional group cytokine biasing colitis. We’ll tell you more about this compound (cas:693-67-4).

The MHC class I-like mol. CD1d is a nonpolymorphic antigen-presenting glycoprotein, and its ligands include glycolipids, such as α-GalCer. The complexes between CD1d and ligands activate natural killer T cells by T cell receptor recognition, leading to the secretion of various cytokines (IFN-γ, IL-4, IL-17A, etc.). Herein, we report structure-activity relationship studies of α-GalCer derivatives containing various functional groups in their lipid acyl chains. Several derivatives have been identified as potent CD1d ligands displaying higher cytokine induction levels and/or unique cytokine polarization. The studies also indicated that flexibility of the lipid moiety can affect the binding affinity, the total cytokine production level and/or cytokine biasing. Based on our immunol. evaluation and investigation of physicochem. properties, we chose bisamide- and Bz amide-containing derivatives 2 and 3, and evaluated their in vivo efficacy in a DSS-induced model of ulcerative colitis. The derivative 3 that exhibits Th2- and Th17-biasing responses, demonstrated significant protective effects against intestinal inflammation in the DSS-induced model, after a single i.p. injection.

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Tetrahydroisoquinoline – Wikipedia,
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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.Computed Properties of C11H23Br.Wang, Senlin; Wu, Hongshuai; Chen, Fanghui; Zhang, Yu; Zhang, Yuchen; Sun, Baiwang published the article 《The antitumor activity of 4,4′-bipyridinium amphiphiles》 about this compound( cas:693-67-4 ) in RSC Advances. Keywords: alveolar basal carcinoma cell bipyridinium amphiphile antitumor SAR. Let’s learn more about this compound (cas:693-67-4).

A series of 4,4′-bipyridinium amphiphiles, compounds I [n = 8-16] were synthesized and their anticancer activities were further evaluated. MTT assay showed that the cytotoxicity first increased and then decreased with the growth of carbon chains (8-16 C) at both ends of bipyridyl. Specifically, compounds with saturated carbon chains consisting of 13 carbons at both ends of bipyridyl displayed the best cell inhibitory activity with IC50 values in the low-micromolar range, which were even superior to that of cisplatin, against all the tested human cancer cells and cisplatin-resistant A549 cancer cells in vitro. In addition, compound I [n = 13] could evidently arrest the G2/M phase of the cell cycle in a dose-dependent manner. Moreover, this study demonstrates the potent performance of compound I [n = 13] in cell growth inhibition and apoptosis induction via a conceivable approach of membrane damage.

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Tetrahydroisoquinoline – Wikipedia,
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