Month: April 2022

Greed, Stephanie; Briggs, Edward L.; Idiris, Fahima I. M.; White, Andrew J. P.; Luecking, Ulrich; Bull, James A. published the article 《Synthesis of Highly Enantioenriched Sulfonimidoyl Fluorides and Sulfonimidamides by Stereospecific Sulfur-Fluorine Exchange (SuFEx) Reaction》. Keywords: enantioenriched sulfonimidoyl fluoride sulfonimidamide preparation stereospecific SuFEx; SuFEx reactions; chirality; sulfonimidamides; sulfur; synthetic methods.They researched the compound: Methyl 3-bromopropanoate( cas:3395-91-3 ).Name: Methyl 3-bromopropanoate. 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:3395-91-3) here.

Sulfonimidamides present exciting opportunities as chiral isosteres of sulfonamides, with potential for addnl. directional interactions. Here the authors present the first modular enantioselective synthesis of sulfonimidamides, including the first stereoselective synthesis of enantioenriched sulfonimidoyl fluorides, and studies on their reactivity. A new route to sulfonimidoyl fluorides is presented from solid bench-stable, N-Boc-sulfinamide salt building blocks. Enantioenriched arylsulfonimidoyl fluorides are shown to be readily racemized by fluoride ions. Conditions are developed, which trap fluoride and enable the stereospecific reaction of sulfonimidoyl fluorides with primary and secondary amines (100% es) generating sulfonimidamides with up to 99% ee. Aryl and alkyl sulfonimidoyl fluoride reagents are suitable for mild late stage functionalization reactions, exemplified by coupling with a selection of complex amines in marketed drugs.

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

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.Liu, Xin; Longwitz, Lars; Spiegelberg, Brian; Toenjes, Jan; Beweries, Torsten; Werner, Thomas researched the compound: Bis(2-(Di(adamantan-1-yl)phosphino)ethyl)amine( cas:1086138-36-4 ).Reference of Bis(2-(Di(adamantan-1-yl)phosphino)ethyl)amine.They published the article 《Erbium-Catalyzed Regioselective Isomerization-Cobalt-Catalyzed Transfer Hydrogenation Sequence for the Synthesis of Anti-Markovnikov Alcohols from Epoxides under Mild Conditions》 about this compound( cas:1086138-36-4 ) in ACS Catalysis. Keywords: tandem erbium catalyst regioselective isomerization cobalt transfer hydrogenation epoxide; synthesis anti Markovnikov alc. We’ll tell you more about this compound (cas:1086138-36-4).

Herein, we report an efficient isomerization-transfer hydrogenation reaction sequence based on a cobalt pincer catalyst (1 mol%), which allows the synthesis of a series of anti-Markovnikov alcs. from terminal and internal epoxides under mild reaction conditions (≤55°, 8 h) at low catalyst loading. The reaction proceeds by Lewis acid (3 mol % Er(OTf)3)-catalyzed epoxide isomerization and subsequent cobalt-catalyzed transfer hydrogenation using ammonia borane as the hydrogen source. The general applicability of this methodol. is highlighted by the synthesis of 43 alcs. from epoxides. A variety of terminal (23 examples) and 1,2-disubstituted internal epoxides (14 examples) bearing different functional groups are converted to the desired anti-Markovnikov alcs. in excellent selectivity and yields of up to 98%. For selected examples, it is shown that the reaction can be performed on a preparative scale up to 50 mmol. Notably, the isomerization step proceeds via the most stable carbocation. Thus, the regiochem. is controlled by stereoelectronic effects. As a result, in some cases, rearrangement of the carbon framework is observed when tri- and tetra-substituted epoxides (6 examples) are converted. A variety of functional groups are tolerated under the reaction conditions even though aldehydes and ketones are also reduced to the resp. alcs. under the reaction conditions. Mechanistic studies and control experiments were used to investigate the role of the Lewis acid in the reaction. Besides acting as the catalyst for the epoxide isomerization, the Lewis acid was found to facilitate the dehydrogenation of the hydrogen donor, which enhances the rate of the transfer hydrogenation step. These experiments addnl. indicate the direct transfer of hydrogen from the amine borane in the reduction step.

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Zhang, Ruiping; Wang, Zhenjun; Xu, Liying; Xu, Yuling; Lin, Yi; Zhang, Ying; Sun, Yao; Yang, Guangfu published the article 《Rational Design of a Multifunctional Molecular Dye with Single Dose and Laser for Efficiency NIR-II Fluorescence/Photoacoustic Imaging Guided Photothermal Therapy》. Keywords: preparation multifunctional dye fluorescence photoacoustic imaging photothermal therapy.They researched the compound: Methyl 3-bromopropanoate( cas:3395-91-3 ).Recommanded Product: Methyl 3-bromopropanoate. 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:3395-91-3) here.

Multifunctional probes integrating accurate multi-diagnosis and efficient therapy hold great prospect in biomedical research. However, the sophisticated construction and difficulties in matching the ratios of doses and laser triggers of probes for each modality imaging and therapy are still hindered the extensive practice of multifunctional probes in biomedicine. We herein rational designed an organic dye SY1080 with intrinsic multifunction by both introducing 3,4-ethylenedioxy thiophene (EDOT) and the selenium containing acceptor unit into the backbone to balance the fluorescence brightness and emission wavelength. Under single dose and 808 nm laser irradiation conditions, SY1080 not only carried out NIR-II fluorescence/Photoacoustic imaging of real-time and noninvasive tumor delineation with excellent contrast, but also effectively ablated tumors with laser irradiation to perform PTT under the guidance of dual-modal imaging. These exciting results highlighted SY1080 as a multifunctional and universal phototheranostic platform for potential applications.

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

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, Article, Organic & Biomolecular Chemistry called Asymmetric α-alkylation of cyclic β-keto esters and β-keto amides by phase-transfer catalysis, Author is Wang, Yakun; Li, Yueyun; Lian, Mingming; Zhang, Jixia; Liu, Zhaomin; Tang, Xiaofei; Yin, Hang; Meng, Qingwei, which mentions a compound: 3395-91-3, SMILESS is O=C(OC)CCBr, Molecular C4H7BrO2, SDS of cas: 3395-91-3.

Without employing any transition metal, a highly enantioselective α-alkylation of cyclic β-keto esters and β-keto amides has been realized by phase-transfer catalysis. This improved procedure is applicable to different kinds of bromides with cinchona derivatives and gives the corresponding products e.g., I and e.g., II, in excellent enantiopurities (up to 98% ee) and good yields (up to 98%). Moreover, the reaction was scalable and the phase-transfer catalyst was recyclable. This provided an alternative and competitive method to the asym. α-alkylation of β-dicarbonyl compounds

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Category: benzothiophene. 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: tert-Butyl 4-(dimethylcarbamoyl)piperidine-1-carboxylate, is researched, Molecular C13H24N2O3, CAS is 254905-58-3, about The influence of conformational restriction in the C-terminus of growth hormone secretagogues on their potency.

In order to obtain more potent growth hormone secretagogues, a comparison of ipamorelin and NN703 suggested the addition of a polar group at the C-terminus of NN703. A study was conducted using constrained amines for this purpose. Here, substituted 4-piperidinylamino- and 4-dimethylaminopiperidino-substituents were found to give the most active compounds A replacement of the 4-dimethylaminopiperidino-substituent with 4-hydroxypiperidino resulted in a series of compounds, which showed in vitro activity with EC50 values in the low nanomolar range, and favorable kinetic properties, such as 40% oral bioavailability. The most promising compound was also tested in a swine in vivo model, resulting in a growth hormone level with a Cmax of over 40 ng mL-1.

In some applications, this compound(254905-58-3)Category: benzothiophene is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

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.Meyer, Tim; Konrath, Robert; Kamer, Paul C. J.; Wu, Xiao-Feng researched the compound: Bis(2-(Di(adamantan-1-yl)phosphino)ethyl)amine( cas:1086138-36-4 ).Formula: C44H69NP2.They published the article 《Pincer Ligand Enhanced Rhodium-Catalyzed Carbonylation of Formaldehyde: Direct Ethylene Glycol Production》 about this compound( cas:1086138-36-4 ) in Asian Journal of Organic Chemistry. Keywords: rhodium formaldehyde ethylene glycol carbonylation catalyst. We’ll tell you more about this compound (cas:1086138-36-4).

Formaldehyde is one of the most important bulk chems. and is produced on a million tone scale (52 million tons in 2017).[1] Since the middle of the last century, the challenge has remained to produce the valuable ethylene glycol (EG) directly from the C1 building block formaldehyde in a single step. In the systems reported so far, the reaction conditions were very harsh, often with pressures above 400 bar. However, under milder conditions, the selectivity was on the side of glycol aldehyde (GA) and the hydrogenation product methanol. Only traces of EG could be generated in the presence of a Rh catalyst. Herein, the authors describe a new Rh catalyst system with pincer ligand, which allows the direct one pot synthesis of EG from easy to handle paraformaldehyde (PFA) at remarkable mild conditions (70 bar, 100°C) and overcomes the aforementioned limitations with yield up to 40%.

In some applications, this compound(1086138-36-4)Formula: C44H69NP2 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Safety of Methyl 3-bromopropanoate. 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: Methyl 3-bromopropanoate, is researched, Molecular C4H7BrO2, CAS is 3395-91-3, about Understanding the Effect of the Electron Spin Relaxation on the Relaxivities of Mn(II) Complexes with Triazacyclononane Derivatives.

Investigating the relaxation of water 1H nuclei induced by paramagnetic Mn(II) complexes is important to understand the mechanisms that control the efficiency of contrast agents used in diagnostic magnetic resonance imaging (MRI). Herein, a series of potentially hexadentate triazacyclononane (TACN) derivatives containing different pendant arms were designed to explore the relaxation of the electron spin in the corresponding Mn(II) complexes using a combination of 1H NMR relaxometry and theor. calculations These ligands include 1,4,7-triazacyclononane-1,4,7-triacetic acid (H3NOTA) and three derivatives in which an acetate group is replaced by sulfonamide (H3NO2ASAm), amide (H2NO2AM) or pyridyl (H2NO2APy) pendants, resp. The analog of H3NOTA containing three propionate pendant arms (H3NOTPrA) was also investigated. The x-ray structure of the derivative containing two acetate groups and a sulfonamide pendant arm [Mn(NO2ASAm)]- evidenced six-coordination of the ligand to the metal ion, with the coordination polyhedron being close to a trigonal prism. The relaxivities of all complexes at 20 MHz and 25° (1.1-1.3 mM-1 s-1) are typical of systems that lack water mols. coordinated to the metal ion. The nuclear magnetic relaxation profiles evidence significant differences in the relaxivities of the complexes at low fields (<1 MHz), which are associated with different spin relaxation rates. The zero field splitting (ZFS) parameters calculated using DFT and CASSCF methods show that electronic relaxation is relatively insensitive to the nature of the donor atoms. However, the twist angle of the two tripodal faces that delineate the coordination polyhedron, defined by the N atoms of the TACN unit (lower face) and the donor atoms of the pendant arms (upper face), has an important effect in the ZFS parameters. A twist angle close to the ideal value for an octahedral coordination (60°), such as that in [Mn(NOTPrA)]-, leads to a small ZFS energy, whereas this value increases as the coordination polyhedron approaches to a trigonal prism. In some applications, this compound(3395-91-3)Safety of Methyl 3-bromopropanoate is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

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 Discovery of Novel Janus Kinase (JAK) and Histone Deacetylase (HDAC) Dual Inhibitors for the Treatment of Hematological Malignancies, published in 2019-04-25, which mentions a compound: 3395-91-3, mainly applied to pyrimidinaminopyrazole hydroxamate preparation JAK HDAC inhibitor hematol malignancy treatment; selected pyrimidinaminopyrazole compound pharmacokinetic study bioavailability antitumor efficacy, HPLC of Formula: 3395-91-3.

Concurrent inhibition of Janus kinase (JAK) and histone deacetylase (HDAC) could potentially improve the efficacy of the HDAC inhibitors in the treatment of cancers and resolve the problem of HDAC inhibitor resistance in some tumors. Here, a novel series of pyrimidin-2-amino-pyrazol hydroxamate derivatives as JAK and HDAC dual inhibitors was designed, synthesized, and evaluated, among which I possessed potent and balanced activities against both JAK2 and HDAC6 with half-maximal inhibitory concentration at the nanomolar level. I exhibited improved antiproliferative and proapoptotic activities over SAHA and ruxolitinib in several hematol. cell lines. Remarkably, I exhibited more potent antiproliferation effect than the combination of SAHA and ruxolitinib in HEL cells bearing JAK2V617F mutation. Pharmacokinetic studies in mice showed that I possessed good bioavailability after i.p. administration. Finally, I showed antitumor efficacy with no significant toxicity in a HEL xenograft model. Collectively, the results confirm the therapeutic potential of JAK and HDAC dual inhibitors in hematol. malignancies and provide valuable leads for further structural optimization and antitumor mechanism study.

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

COA of Formula: C4H7BrO2. 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: Methyl 3-bromopropanoate, is researched, Molecular C4H7BrO2, CAS is 3395-91-3, about Melanin-dot-mediated delivery of metallacycle for NIR-II/photoacoustic dual-modal imaging-guided chemo-photothermal synergistic therapy. Author is Sun, Yue; Ding, Feng; Chen, Zhao; Zhang, Ruiping; Li, Chonglu; Xu, Yuling; Zhang, Yi; Ni, Ruidong; Li, Xiaopeng; Yang, Guangfu; Sun, Yao; Stang, Peter J..

Discrete Pt(II) metallacycles have potential applications in biomedicine. Herein, we engineered a dual-modal imaging and chemo-photothermal therapeutic nano-agent 1 that incorporates discrete Pt(II) metallacycle 2 and fluorescent dye 3 (emission wavelength in the second near-IR channel [NIR-II]) into multifunctional melanin dots with photoacoustic signal and photothermal features. Nano-agent 1 has a good solubility, biocompatibility, and stability in vivo. Both photoacoustic imaging and NIR-II imaging in vivo confirmed that 1 can effectively accumulate at tumor sites with good signal-to-background ratio and favorable distribution. Guided by precise dual-modal imaging, nano-agent 1 exhibits a superior antitumor performance and less severe side effects compared with a single treatment because of the high efficiency of the chemo-photothermal synergistic therapy. This study shows that nano-agent 1 provides a promising multifunctional theranostic platform for potential applications in biomedicine.

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Functional brain imaging in larval zebrafish for characterising the effects of seizurogenic compounds acting via a range of pharmacological mechanisms》. Authors are Winter, Matthew J.; Pinion, Joseph; Tochwin, Anna; Takesono, Aya; Ball, Jonathan S.; Grabowski, Piotr; Metz, Jeremy; Trznadel, Maciej; Tse, Karen; Redfern, Will S.; Hetheridge, Malcolm J.; Goodfellow, Marc; Randall, Andrew D.; Tyler, Charles R..The article about the compound:XE991 Dihydrochloridecas:122955-13-9,SMILESS:O=C1C2=C(C=CC=C2)C(CC3=CC=NC=C3)(CC4=CC=NC=C4)C5=CC=CC=C15.[H]Cl.[H]Cl).Recommanded Product: 122955-13-9. Through the article, more information about this compound (cas:122955-13-9) is conveyed.

Functional brain imaging using genetically encoded Ca2+ sensors in larval zebrafish is being developed for studying seizures and epilepsy as a more ethical alternative to rodent models. Despite this, few data have been generated on pharmacol. mechanisms of action other than GABAA antagonism. Assessing larval responsiveness across multiple mechanisms is vital to test the translational power of this approach, as well as assessing its validity for detecting unwanted drug-induced seizures and testing antiepileptic drug efficacy. Using light-sheet imaging, we systematically analyzed the responsiveness of 4 days post fertilisation (dpf; which are not considered protected under European animal experiment legislation) transgenic larval zebrafish to treatment with 57 compounds spanning more than 12 drug classes with a link to seizure generation in mammals, alongside eight compounds with no such link. We show 4dpf zebrafish are responsive to a wide range of mechanisms implicated in seizure generation, with cerebellar circuitry activated regardless of the initiating pharmacol. Anal. of functional connectivity revealed compounds targeting cholinergic and monoaminergic reuptake, in particular, showed phenotypic consistency broadly mapping onto what is known about neurotransmitter-specific circuitry in the larval zebrafish brain. Many seizure-associated compounds also exhibited altered whole brain functional connectivity compared with controls. This work represents a significant step forward in understanding the translational power of 4dpf larval zebrafish for use in neuropharmacol. studies and for studying the events driving transition from small-scale pharmacol. activation of local circuits, to the large network-wide abnormal synchronous activity associated with seizures.

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Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem