Tag: M.W:200-300

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: 57399-11-8, is researched, Molecular C14H9Cl, about Discovery of a novel series of N-hydroxypyridone derivatives protecting astrocytes against hydrogen peroxide-induced toxicity via improved mitochondrial functionality, the main research direction is hydroxy pyridone derivative preparation astrocyte neuroprotectant mitochondria; Astrocytes; Ciclopirox; N-hydroxypyridone; Neuroprotection; Oxidative stress.Formula: C14H9Cl.

Astrocytes play a key role in brain homeostasis, protecting neurons against neurotoxic stimuli such as oxidative stress. Therefore, the neuroprotective therapeutics that enhance astrocytic functionality has been regarded as a promising strategy to reduce brain damage. We previously reported that ciclopirox, a well-known antifungal N-hydroxypyridone compound, protects astrocytes from oxidative stress by enhancing mitochondrial function. Using the N-hydroxypyridone scaffold, we have synthesized a series of cytoprotective derivatives Mitochondrial activity assay showed that N-hydroxypyridone derivatives with biphenyl group have comparable to better protective effects than ciclopirox in astrocytes exposed to H2O2. N-hydroxypyridone derivatives, especially 11g, inhibited H2O2-induced deterioration of mitochondrial membrane potential and oxygen consumption rate, and significantly improved cell viability of astrocytes. The results indicate that the N-hydroxypyridone motif can provide a novel cytoprotective scaffold for astrocytes via enhancing mitochondrial functionality.

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

Lerch, Swantje; Strassner, Thomas published an article about the compound: 1-Bromoundecane( cas:693-67-4,SMILESS:CCCCCCCCCCCBr ).SDS of cas: 693-67-4. 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.

A series of tunable aryl alkyl ionic liquids I [R = 2-Me, 4-Br, 2,4-di-Me, etc.; n = 4,5,6,7,8,9,10,11,12] with different properties due to the electron-donating or -withdrawing effect of the substituents at the aryl ring was developed. Herein, a wide variety of those ionic liquids (ILs) was presented in terms of their cation structure. The synthesized ILs containing the bromide or bis(trifluoromethane)sulfonimide anion and 1-aryl-3-alkyl imidazolium cations with various substituents in the ortho and/ or para position of the Ph ring and alkyl chains of different lengths varying from Bu to dodecyl. The differences of their phys. properties (m.p., thermal decomposition, viscosity, electro-chem. window) of these ILs were reported according to their structure.

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Tetrahydroisoquinoline – Wikipedia,
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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 Chalcogen bonding and liquid crystallinity: Understanding the anomalous behaviour of the 4′-(alkylthio)[1,1′-biphenyl]-4-carbonitriles (nSCB), published in 2022-01-15, which mentions a compound: 693-67-4, mainly applied to alkylthio biphenyl carbonitrile preparation chalcogen bonding liquid crystallinity, SDS of cas: 693-67-4.

The synthesis and characterization of the first eleven members of the 4′-(alkylthio)[1,1′-biphenyl]-4-carbonitriles, I [n = 1, 2, 3, etc.] was reported. All eleven members I showed monotropic liquid crystal behavior. The first six members were exclusively nematogenic, the seventh member showed nematic and smectic A phases and the higher homologues only smectic A behavior. A comparison of their transitional behavior with that of the corresponding alkyl and alkyloxy-cyanobiphenyls revealed a new pattern of behavior. Specifically, the nematic-isotropic transition temperatures showed a large decrease on passing from the methylthio to ethylthio homologues. This unexpected behavior was interpreted in terms of chalcogen bonding.

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

Reference of 1-Bromoundecane. 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 Imidazole and benzoimidazole derived new ionic liquid crystal compounds: synthesis, characterisation, mesomorphic properties and DFT computations. Author is Mohammad, AbdulKarim-Talaq; Khalefa, Omar S.; Srinivasa, H. T.; Ameen, Wissam Ahmed.

Four new series of ionic liquid crystals derived from imidazole bromonium and benzimidazole bromonium salts with spacer alkyl chain (Cn, n = 2, 4) were synthesized and characterized. The following tests and measurements have been performed: the FT-IR, 1H-NMR and 13C-NMR spectroscopy in addition to a CHN elemental anal. techniques. Both the differential scanning calorimetry and the polarizing optical microscopy measurements were applied for the evaluation of liquid crystals properties. The outcome confirms the existence of a smectic A liquid crystalline phase. A D. Functional Theory computations were performed to obtain the shape of the mol. structure that corresponds to the ground-state energy.

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

Application In Synthesis of 7-Bromo-5-nitro-1H-indole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 7-Bromo-5-nitro-1H-indole, is researched, Molecular C8H5BrN2O2, CAS is 87240-07-1, about Novel Pyrrolopyridone Bromodomain and Extra-Terminal Motif (BET) Inhibitors Effective in Endocrine-Resistant ER+ Breast Cancer with Acquired Resistance to Fulvestrant and Palbociclib. Author is Li, Yangfeng; Zhao, Jiong; Gutgesell, Lauren M.; Shen, Zhengnan; Ratia, Kiira; Dye, Katherine; Dubrovskyi, Oleksii; Zhao, Huiping; Huang, Fei; Tonetti, Debra A.; Thatcher, Gregory R. J.; Xiong, Rui.

Acquired resistance to fulvestrant and palbociclib is a new challenge to treatment of estrogen receptor pos. (ER+) breast cancer. ER is expressed in most resistance settings; thus, bromodomain and extra-terminal protein inhibitors (BETi) that target BET-amplified ER-mediated transcription have therapeutic potential. Novel pyrrolopyridone BETi leveraged novel interactions with L92/L94 confirmed by a cocrystal structure of 27 with BRD4. Optimization of BETi using growth inhibition in fulvestrant-resistant (MCF-7:CFR) cells was confirmed in endocrine-resistant, palbociclib-resistant, and ESR1 mutant cell lines. 27 was more potent in MCF-7:CFR cells than six BET inhibitors in clin. trials. Transcriptomic anal. differentiated 27 from the benchmark BETi, JQ-1, showing downregulation of oncogenes and upregulation of tumor suppressors and apoptosis. The therapeutic approach was validated by oral administration of 27 in orthotopic xenografts of endocrine-resistant breast cancer in monotherapy and in combination with fulvestrant. Importantly, at an equivalent dose in rats, thrombocytopenia was mitigated.

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

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called α-Hydroxy-Tetrazoles as Latent Ethynyl Moieties: A Mechanistic Investigation, published in 2019, which mentions a compound: 57399-11-8, Name is 4-Chloro-4′-ethynyl-1,1′-biphenyl, Molecular C14H9Cl, Application of 57399-11-8.

This article focuses on the dehydration of α-hydroxy-tetrazoles, leading to tetraazafulvenes and then to vinylic carbenes that rearrange into ethynyl moieties through the Fritsch-Buttenberg-Wiechell rearrangement. Each step of this sequence was scrutinized, either by examination of the substrate and/or dehydrating agent scope, or through AM1 calculations, to understand the limiting step of this process. This underrated transformation appears to be a viable alternative to existing methods used for transforming aldehydes into alkynes.

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

Computed Properties of C11H23Br. 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 Synthesis and antibacterial activity of new tetrakisquaternary ammonium compounds based on pentaerythritol and 3-hydroxypyridine. Author is Vereshchagin, A. N.; Minaeva, A. P.; Egorov, M. P..

Tetrakisquaternary ammonium compounds based on pentaerythritol I (n = 7, 8, 9, 10, 11, 12) were synthesized for the first time. Bacteriostatic effect of the obtained compounds I was evaluated towards opportunistic gram-pos. Methicillin-resistant Staphylococcus aureus (strain ATCC 25923), gram-neg. Escherichia coli (ATCC 25922), and Pseudomonas aeruginosa (ATCC 27853). The activity of reported salts I was evaluated competitively with that of known antiseptics, Octenidine Dihydrochloride and Chlorhexidine Digluconate. The effect of length of the alkyl substituent in the salts I on their biol. activity was established. These new compounds I are based on available pentaerythritol and 3-hydroxypyridine.

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

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.Reference of 2,6-Dimethyl-3,5-heptanedione. The article 《Alkyl Chain Tuning of Small Molecule Acceptors for Efficient Organic Solar Cells》 in relation to this compound, is published in Joule. Let’s take a look at the latest research on this compound (cas:693-67-4).

The field of organic solar cells has seen rapid developments after the report of a high-efficiency (15.7%) small mol. acceptor (SMA) named Y6. In this paper, we design and synthesize a family of SMAs with an aromatic backbone identical to that of Y6 but with different alkyl chains to investigate the influence of alkyl chains on the properties and performance of the SMAs. First, we show that it is beneficial to use branched alkyl chains on the nitrogen atoms of the pyrrole motif of the Y6. In addition, the branching position of the alkyl chains also has a major influence on material and device properties. The SMA with 3rd-position branched alkyl chains (named N3) exhibits optimal solubility and electronic and morphol. properties, thus yielding the best performance. Further device optimization using a ternary strategy allows us to achieve a high efficiency of 16.74% (and a certified efficiency of 16.42%).

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

Reference of 1-Bromoundecane. 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: 1-Bromoundecane, is researched, Molecular C11H23Br, CAS is 693-67-4, about Synthesis and Docking Study of N-(Cinnamoyl)-N’-(substituted)acryloyl Hydrazide Derivatives Containing Pyridinium Moieties as a Novel Class of Filamentous Temperature-Sensitive Protein Z Inhibitors against the Intractable Xanthomonas oryzae pv. oryzae Infections in Rice. Author is Zhou, Xiang; Feng, Yu-Mei; Qi, Pu-Ying; Shao, Wu-Bin; Wu, Zhi-Bing; Liu, Li-Wei; Wang, Yi; Ma, Hao-Dong; Wang, Pei-Yi; Li, Zhong; Yang, Song.

A series of novel N-(cinnamoyl)-N’-(substituted)acryloyl hydrazide derivatives containing pyridinium moieties I•X- [n = 4-11; R = Ph, 4-FC6H4, 2-thienyl, etc.; X = Br, I] were designed, and the anti-Xoo activity was determined The bioassay results showed that compound I•Br- [n = 10; R = Ph; X = Br] had excellent anti-Xoo activity (EC50 = 0.99 mg L-1) in vitro and distinct curative activity (63.2% at 200 mg L-1) in vivo. Further studies revealed that these designed compounds were XooFtsZ inhibitors, validating by the reduced GTPase activity of recombinant XooFtsZ, the non-filamentous XooFtsZ assembly observed in the TEM images, and the prolonged Xoo cells from the fluorescence patterns. Computational docking studies showed that compound I•Br- [n = 10; R = Ph; X = Br] had strong interactions with ASN34, GLN193, and GLN197 residues located in the α helix regions of XooFtsZ. The present study demonstrated the developed FtsZ inhibitors could serve as agents to control Xoo-induced infections.

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

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called One-step zwitterionization and quaternization of thick PDMAEMA layer grafted through subsurface-initiated ATRP for robust antibiofouling and antibacterial coating on PDMS, published in 2022-03-15, which mentions a compound: 693-67-4, Name is 1-Bromoundecane, Molecular C11H23Br, Computed Properties of C11H23Br.

In this work, we demonstrate the grafting of thick poly((2-dimethylamino) Et methacrylate) (PDMAEMA) layer on PDMS via subsurface-initiated atom transfer radical polymerization (SSI-ATRP). The self-migration of DMAEMA monomers into the subsurface of PDMS is proven to be the dominant factor for the success of SSI-ATRP. The as-prepared thick microscale graft layer on PDMS shows much better abrasion resistance than nanoscale graft layer obtained by conventional surface-initiated atom transfer radical polymerization (SI-ATRP) under identical condition. Taking advantage of the tertiary amines of PDMAEMA, the simultaneous zwitterionization and quaternization of the PDMAEMA thick layer is realized through a facile one-step process. The effect of zwitterionization and quaternization degree on the antibiofouling and antibacterial properties is investigated. The results show that a relatively high zwitterionization degree (75 mol%) and a low quaternization degree (25 mol%) exhibit a good well-balanced effect on both fouling repellence and bactericidal activity. This work may lead to the development of robust bifunctional antibiofouling and antibacterial surfaces via SSI-ATRP strategy.

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