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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: (S)-Butan-2-ol( cas:4221-99-2 ) is researched.Category: tetrahydrofurans.Kilic, Ahmet; Balci, Tugba Ersayan; Arslan, Nevin; Aydemir, Murat; Durap, Feyyaz; Okumus, Veysi; Tekin, Recep published the article 《Synthesis of cis-1,2-diol-type chiral ligands and their dioxaborinane derivatives: Application for the asymmetric transfer hydrogenation of various ketones and biological evaluation》 about this compound( cas:4221-99-2 ) in Applied Organometallic Chemistry. Keywords: diol chiral ligand dioxaborinane preparation radical scavenging antibacterial; reducing power DNA binding cleavage diol chiral ligand dioxaborinane; chiral stereoselective transfer hydrogenation ketone diol chiral ligand dioxaborinane. Let’s learn more about this compound (cas:4221-99-2).

Two cis-1,2-diol-type chiral ligands (T1 and T2) and their tri-coordinated chiral dioxaborinane (T(1-2)B(1-2)) and four-coordinated chiral dioxaborinane adducts with 4-tert-Bu pyridine sustained by N → B dative bonds (T(1-2)B(1-2)-N) were synthesized and characterized by various spectroscopic techniques such as NMR (1H, 13C, and 11B), FT-IR and UV-Vis spectroscopy, LC-MS/MS, and elemental anal. It was suggested that both ferrocene and trifluoromethyl groups played key roles in the catalytic and biol. studies because they could tune the solubility of the chiral dioxaborinane complexes and adjust the strength of intermol. interactions. To assess the biol. activities of newly synthesized chiral dioxaborinane compounds, DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging, reducing power, antibacterial, DNA binding, and DNA cleavage activities were tested. Then, all chiral dioxaborinane complexes were investigated as catalysts for the asym. transfer hydrogenation of various ketones under suitable conditions. The results indicated that the chiral dioxaborinane catalysts performed well with high yields.

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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: 4221-99-2, is researched, SMILESS is C[C@H](O)CC, Molecular C4H10OJournal, Article, Chemistry – A European Journal called Kinetic control of a self-assembly pathway towards hidden chiral microcoils, Author is Guo, Yongxian; Liu, Yin; Gong, Yanjun; Xiong, Wei; Zhang, Chuang; Zhao, Jincai; Che, Yanke, the main research direction is chiral microcoil self assembly kinetic control; azobenzene; chirality; kinetic control; pathway complexity; photoisomerization.Application of 4221-99-2.

Manipulating the self-assembly pathway is essentially important in the supramol. synthesis of organic nano- and microarchitectures. Herein, we design a series of photoisomerizable chiral mols., and realize precise control over pathway complexity with external light stimuli. The hidden single-handed microcoils, rather than the straight microribbons through spontaneous assembly, are obtained through a kinetically controlled pathway. The competition between mol. interactions in metastable photostationary intermediates gives rise to a variety of mol. packing and thereby the possibility of chirality transfer from mols. to supramol. assemblies.

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Tetrahydrofuran – Wikipedia,
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Name: (S)-Butan-2-ol. 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: (S)-Butan-2-ol, is researched, Molecular C4H10O, CAS is 4221-99-2, about Separation of 2-Bromobutane, 2-Chlorobutane, 2-Chloropentane, and 2-Butanol Enantiomers Using a Stationary Phase Based on a Supramolecular Uracil Structure. Author is Nafikova, A. R.; Allayarova, D. A.; Gus’kov, V. Yu..

Abstract: the authors proposed a new chiral stationary phase based on a supramol. uracil structure with induced chirality. According to the Kondepudi effect, mech. stirring gives a supramol. structure layer on the surface of an adsorbent with a predominance of 1 of types of chiral supramol. clusters. The obtained stationary phase was used for the gas-chromatog. separation of enantiomers of 2-bromobutane, 2-chlorobutane, 2-chloropentane, and 2-butanol. The effectiveness of a 1-m column packed with an inert stationary phase modified with uracil is 200-400 theor. plates. The enantiomers of 2-bromobutane and 2-chlorobutane were completely separated using the proposed stationary phase in 210 and 180 s, resp., at 45°. The enantiomers of 2-chloropentane were separated at 60 and 65° in 170 and 160 s, resp. The enantiomers of 2-butanol were partially separated at 100°. The enantioselectivity of the proposed stationary phase is probably associated with the adsorption of 1 enantiomer outside the cavity of the supramol. structure and the other enantiomer inside it.

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Tetrahydrofuran – Wikipedia,
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Name: (S)-Butan-2-ol. 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: (S)-Butan-2-ol, is researched, Molecular C4H10O, CAS is 4221-99-2, about Time-space-resolved origami hierarchical electronics for ultrasensitive detection of physical and chemical stimuli.

Recent years have witnessed thriving progress of flexible and portable electronics, with very high demand for cost-effective and tailor-made multifunctional devices. Here, we report on an ingenious origami hierarchical sensor array (OHSA) written with a conductive ink. Thanks to origami as a controllable hierarchical framework for loading ink material, we have demonstrated that OHSA possesses unique time-space-resolved, high-discriminative pattern recognition (TSR-HDPR) features, qualifying it as a smart sensing device for simultaneous sensing and distinguishing of complex phys. and chem. stimuli, including temperature, relative humidity, light and volatile organic compounds (VOCs). Of special importance, OSHA has shown very high sensitivity in differentiating between structural isomers and chiral enantiomers of VOCs – opening a door for wide variety of unique opportunities in several length scales.

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Tetrahydrofuran – Wikipedia,
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Gilissen, Pieter J.; Slootbeek, Annemiek D.; Ouyang, Jiangkun; Vanthuyne, Nicolas; Bakker, Rob; Elemans, Johannes A. A. W.; Nolte, Roeland J. M. published the article 《Enantioselective synthesis of chiral porphyrin macrocyclic hosts and kinetic enantiorecognition of viologen guests》. Keywords: chiral porphyrin preparation enantioselective kinetic enantiorecognition viologen guest.They researched the compound: (S)-Butan-2-ol( cas:4221-99-2 ).Related Products of 4221-99-2. 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:4221-99-2) here.

The asym. synthesis of two enantiomeric C2-sym. porphyrin macrocyclic hosts (R,R,R,R)/(S,S,S,S)-I that thread and bind different viologen guests is described. Time-resolved fluorescence studies show that these hosts display a factor 3 kinetic preference (ΔΔGon = 3 kJ mol-1) for threading onto the different enantiomers of a viologen guest appended with bulky chiral 1-phenylethoxy termini. A smaller kinetic selectivity (ΔΔGon = 1 kJ mol-1) is observed for viologens equipped with small chiral sec-butoxy termini. Kinetic selectivity is absent when the C2-sym. hosts are threaded onto chiral viologens appended with chiral tails in which the chiral moieties are located in the centers of the chains, rather than at the chain termini. The reason is that the termini of the latter guests, which engage in the initial stages of the threading process (entron effect), cannot discriminate because they are achiral, in contrast to the chiral termini of the former guests. Finally, the experiments show that the threading and de-threading rates are balanced in such a way that the observed binding constants are highly similar for all the investigated host-guest complexes, i.e. there is no thermodn. selectivity.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Application In Synthesis of (S)-Butan-2-ol. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (S)-Butan-2-ol, is researched, Molecular C4H10O, CAS is 4221-99-2, about Preliminary exploration on enzyme-promoted asymmetric biomimetic synthesis of resveratrol dimers. Author is Lei, Tian; Guan, Xingchao; Kang, Xiaodong; Wang, Yuefei; Han, Li; Li, Wenling.

The asym. biomimetic synthesis of resveratrol dimers was preliminarily explored using the enzyme-mediated oxidative coupling reactions of chiral resveratrol derivatives as the key step. The horseradish peroxidase-H2O2-promoted oxidations of 11,13-di-sec-butylresveratrol ether and 3,5-dibromoresveratrol di-sec-Bu ethers generated an 8-5-coupled intermediate and several 8-8-coupled dimeric mixtures, resp. The acid-catalyzed debutylation of the coupling dimers and hydrogenolytic debromination synthesized natural (+)-δ-viniferin (I) and unnatural (+)-isoquadrangularin A (II) with undetermined stereoisomer ratio.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Name: (S)-Butan-2-ol. 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: (S)-Butan-2-ol, is researched, Molecular C4H10O, CAS is 4221-99-2, about Time-space-resolved origami hierarchical electronics for ultrasensitive detection of physical and chemical stimuli.

Recent years have witnessed thriving progress of flexible and portable electronics, with very high demand for cost-effective and tailor-made multifunctional devices. Here, we report on an ingenious origami hierarchical sensor array (OHSA) written with a conductive ink. Thanks to origami as a controllable hierarchical framework for loading ink material, we have demonstrated that OHSA possesses unique time-space-resolved, high-discriminative pattern recognition (TSR-HDPR) features, qualifying it as a smart sensing device for simultaneous sensing and distinguishing of complex phys. and chem. stimuli, including temperature, relative humidity, light and volatile organic compounds (VOCs). Of special importance, OSHA has shown very high sensitivity in differentiating between structural isomers and chiral enantiomers of VOCs – opening a door for wide variety of unique opportunities in several length scales.

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Reference:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – 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.Gus’kov, V. Yu.; Gainullina, Yu. Yu.; Uteeva, Zh. D.; Musabirov, D. E. researched the compound: (S)-Butan-2-ol( cas:4221-99-2 ).Recommanded Product: (S)-Butan-2-ol.They published the article 《Application of a Chiral Stationary Phase Based on 3,4,9,10-Perylenetetracarboxylic Acid to the Separation of Enantiomers under the Conditions of Gas and Liquid Chromatography》 about this compound( cas:4221-99-2 ) in Journal of Analytical Chemistry. Keywords: chiral stationary phase perylenetetracarboxylic acid separation enantiomer GC HPLC. We’ll tell you more about this compound (cas:4221-99-2).

Abstract: A chiral stationary phase is proposed on the basis of 3,4,9,10-perylenetetracarboxylic acid (3,4,9,10-perylentetracarbonacid, PTCA). The PTCA mol. itself is not chiral; however, it can form chiral supramol. structures. Symmetry breaking during the self-assembly of PTCA supramol. structures was carried out similarly to the Viedma ripening process. The obtained stationary phases with PTCA multilayers on an inert solid support and C18 silica were used to sep. racemates in gas and liquid chromatog., resp. It was found that the proposed stationary phases exhibit enantioselectivity with respect to pairs of enantiomers bearing a hydroxyl group at an asym. carbon atom. Enantiomers of butanol-2, pentanol-2, and 1-methoxy-propanol-2 were separated by gas chromatog. The separation of menthols was achieved in the normal-phase HPLC mode. It was shown that the separation of the last named compounds is possible up to a concentration of 0.04 mg/mL inclusive.

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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 Preparation of Enantioenriched Alkylcarbastannatranes via Nucleophilic Inversion of Alkyl Mesylates for Use in Stereospecific Cross-Coupling Reactions, published in 2019-10-28, which mentions a compound: 4221-99-2, Name is (S)-Butan-2-ol, Molecular C4H10O, Related Products of 4221-99-2.

The authors report the preparation of enantioenriched secondary alkylcarbastannatranes via a stereoinvertive SN2 reaction of enantioenriched alkyl mesylates and carbastannatranyl anion equivalent Using this process, enantioenriched secondary alcs. may be converted into highly enantioenriched alkylcarbastannatranes, which are useful in stereospecific cross-coupling reactions.

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Application In Synthesis of (S)-Butan-2-ol. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Butan-2-ol, is researched, Molecular C4H10O, CAS is 4221-99-2, about Straightforward N-alkylation of diketopyrrolopyrroles through the Mitsunobu reaction with benzyl, α-branched, and chiral alcohols. Author is Mastropasqua Talamo, Maurizio; Pop, Flavia; Avarvari, Narcis.

The N-alkylation of diketopyrrolopyrroles (DPPs) I (Ar = 2-thienyl, 4-bromophenyl, 2-pyridyl) represents a fundamental step to ensure solubility and further processability. Commonly used nucleophilic substitution in halogenated derivatives is replaced in this work by the Mitsunobu reaction affording unprecedented DPPs with α-branched and chiral chains e.g., II.

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