Tag: M.W:200-300

Quality Control of (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid. 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: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Two Homochiral Bimetallic Metal-Organic Frameworks Composed of a Paramagnetic Metalloligand and Chiral Camphorates: Multifunctional Properties of Sorption, Magnetism, and Enantioselective Separation. Author is Ryu, Dae Won; Lee, Woo Ram; Lim, Kwang Soo; Phang, Won Ju; Hong, Chang Seop.

Two porous metal-organic frameworks [Co(Tt)2][Cu4(D-cam)4]·5H2O·DMF (1; Tt = tris(triazolyl)borate, D-H2cam = D-(+)-camphoric acid or (1R,3S)-1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid) and [Co(Tt)2][Cu4(L-cam)4]·5H2O·2DMF (2; L-H2cam = L-(-)-camphoric acid or (1S,3R)-1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid) were prepared by mixing Cu2+, Co(Tt), and camphoric acid under solvothermal conditions. The structures of 1 and 2 reveal that the two-dimensional layers composed of chiral ligands and Cu-Cu paddlewheel units are connected through the metalloligands to form three-dimensional networks. These solids show multifunctional properties such as gas adsorption onto the pores of the frameworks, antiferromagnetic coupling between spin carriers, and a small enantioselective separation of racemic alcs.

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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: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid( cas:560-09-8 ) is researched.Application of 560-09-8.Usami, Atsushi; Motooka, Ryota; Miyazawa, Mitsuo published the article 《Highly selective biotransformation of (+)-(1S)- and (-)-(1R)-camphorquinone by Aspergillus wentii》 about this compound( cas:560-09-8 ) in Biocatalysis and Biotransformation. Keywords: Aspergillus selective biotransformation camphorquinone. Let’s learn more about this compound (cas:560-09-8).

To clarify the structures of biotransformation products and metabolic pathways, the biotransformation of monoterpenoids, (+)- and (-)-camphorquinone (1a and b), has been investigated using Aspergillus wentii as a biocatalyst. Compound 1a was converted to (-)-(2S)-exo-hydroxycamphor (2a), (-)-(2S)-endo-hydroxycamphor (3a), (-)-(3S)-exo-hydroxycamphor (4a), (-)-(3S)-endo-hydroxycamphor (5a), and (+)-camphoric acid (6a). Compound 1b was converted to (+)-(2R)-exo-hydroxycamphor (2b), (+)-(2R)-endo-hydroxycamphor (3b), (+)-(3R)-exo-hydroxycamphor (4b), (+)-(3R)-endo-hydroxycamphor (5b), and (-)-camphoric acid (6b). Compound 1a mainly produced 2a (65.0%) with stereoselectivity, whereas 1b afforded 3b (84.3%) with high stereoselectivity. These structures were confirmed by gas chromatog.-mass spectrometry, IR, 1H NMR (NMR), and 13C NMR spectral data. The products illustrate the marked ability of A. wentii for enzymic oxidation and ketone reduction

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Gu, Zhi-Gang; Fu, Wen-Qiang; Wu, Xin; Zhang, Jian published the article 《Liquid-phase epitaxial growth of a homochiral MOF thin film on poly(L-DOPA) functionalized substrate for improved enantiomer separation》. Keywords: liquid phase epitaxial growth homochiral metal organic framework film; copper camphorate homochiral metal organic framework film; DOPA polymer substrate MOF functionalized enantiomer separation GC.They researched the compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid( cas:560-09-8 ).HPLC of Formula: 560-09-8. 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:560-09-8) here.

A homochiral MOF film grown on a functionalized substrate in a capillary column with high orientation and homogeneity was successfully prepared by using a layer-by-layer liquid phase epitaxial method; by introducing self-polymerized 3,4-dihydroxy-L-phenylalanine (poly(L-DOPA)) as a chiral substrate, the obtained enantiopure substrate mounted homochiral MOF thin film showed improved enantiomer separation

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Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

SDS of cas: 560-09-8. 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: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Chiral Reticular Self-Assembly of Achiral AIEgen into Optically Pure Metal-Organic Frameworks (MOFs) with Dual Mechano-Switchable Circularly Polarized Luminescence.

Circularly polarized luminescence (CPL) is attractive in understanding the excited-state chirality and developing advanced materials. A chiral reticular self-assembly strategy to unite achiral AIEgens, chirality donors, and metal ions to fabricate optically pure AIEgen metal-organic frameworks (MOFs) as efficient CPL materials is proposed. CPL activity of the single-crystal AIEgen MOF was generated by the framework-enabled strong emission from AIEgens and through-space chirality transfer from chirality donors to achiral AIEgens via metal-ion bridges. A dual mechano-switched blue and red shifted CPL activity was achieved via ultrasonication and grinding, which enabled the rotation or stacking change of AIEgen rotors with the intact homochiral framework. This work provided not only an insightful view of the aggregation-induced emission (AIE) mechanism, but also an efficient and versatile strategy for the preparation of stimuli-responsive CPL materials.

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Isothiazole – Wikipedia,
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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The polymorphism of organic compounds》. Authors are Naveau, J..The article about the compound:(1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acidcas:560-09-8,SMILESS:CC1(C)[C@@H](CC[C@]1(C)C(O)=O)C(O)=O).SDS of cas: 560-09-8. Through the article, more information about this compound (cas:560-09-8) is conveyed.

Observations were made of the polymorphic transformations of organic compounds on the stage of a polarizing microscope. The crystals were cooled to -165° and heated to 200°. Under normal pressure polymorphism could not be proved for several compounds Enantiotropic pseudotransition was exhibited by phenol at -2°, caused by impurities. 1-Methylcyclopentanol, phenol, cyclopentyl cyanide, Me3COH, and CHI3 showed no true polymorphism. MeCN was not enantiotropic. Glutaric acid, lauryl alc., chloral hydrate, Me2C(Et)OH, and succinonitrile were enantiotropic. Hydroquinone, malonitrile, and Me oxalate were dimorphic monotropes. d-Camphoric acid was a true monotrope. 55 references.

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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: 560-09-8, is researched, SMILESS is CC1(C)[C@@H](CC[C@]1(C)C(O)=O)C(O)=O, Molecular C10H16O4Journal, Journal of Molecular Structure called Investigation on two homologus series of ferroelectric hydrogen bond liquid crystals derived from camphoric acid and alkyloxy/alkyl benzoic acids, Author is Mohan, M. L. N. Madhu; Pal, Kaushik, the main research direction is hydrogen bonded liquid crystal camphoric alkyl benzoic carboxylic acids; homologus ferroelec hydrogen bond liquid crystal poly phase morphism.Synthetic Route of C10H16O4.

Two ferroelec. series comprising of 12 mesogens are investigated. In the first homologous series, Camphoric acid abbreviated as CA which is a ferroelec. ingredient, formed hydrogen bonds with benzoic acids with oxygen atom abbreviated as nBAO. The carbon chain of the benzoic acids varied from 5 to 12 atoms. Thus eight homologous members are synthesized. This mesogenic homologous series is represented as CA+nBAO. Similarly, Camphoric acid formed hydrogen bonds with alkyl benzoic acids abbreviated as nBA. The carbon number of the benzoic acids varied from 5 to 8. This mesogenic homologous series is represented as CA+nBA. Phases observed includes a new phase variant Smectic X*, and conventional phases C*, I* and G*. DSC thermograms exposed the Tc and corresponding ΔH magnitudes. Dielec. relaxations in smectic C* are discussed for a selected mesogen. The existence of oxygen in CA+nBAO facilitated presence of abundance poly phase morphism.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid(SMILESS: CC1(C)[C@@H](CC[C@]1(C)C(O)=O)C(O)=O,cas:560-09-8) is researched.Synthetic Route of Al2H8O13S3. The article 《Oriented Circular Dichroism Analysis of Chiral Surface-Anchored Metal-Organic Frameworks Grown by Liquid-Phase Epitaxy and upon Loading with Chiral Guest Compounds》 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:560-09-8).

Oriented CD (OCD) is explored and successfully applied to study chiral surface-anchored metal-organic frameworks (SURMOFs) based on camphoric acid (D- and Lcam) [Cu2(Dcam)2x(Lcam)2-2x(dabco)]n (dabco = 1,4-diazabicyclo-[2.2.2]-octane). The three-dimensional chiral SURMOFs with high-quality orientation were grown on quartz glass plates by using a layer-by-layer LPE method. The growth orientation, as determined by XRD, could be switched between the [001] and [110] direction by using either OH- or COOH-terminated substrates. These SURMOFs were characterized by using OCD, which confirmed the ratio as well as the orientation of the enantiomeric linker mols. Theor. computations demonstrate that the OCD band intensities of the enantiopure [Cu2(Dcam)2(dabco)]n grown in different orientations are a direct result of the anisotropic nature of the chiral SURMOFs. Finally, the enantiopure [Cu2(Dcam)2(dabco)]n and [Cu2(Lcam)2(dabco)]n SURMOFs were loaded with the two chiral forms of Et lactate [(+)-ethyl-D-lactate and (-)-ethyl-L-lactate]. An enantioselective enrichment of >60% was observed by OCD when the chiral host scaffold was loaded from the racemic mixture

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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: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about HPLC detection and evaluation of chiral compounds with a laser-based chiroptical detector.Formula: C10H16O4.

The sensitivity and ruggedness of chiroptical detectors have improved considerably during the past decade. The authors examine >230 chiral compounds using the latest laser-based polarimetry detector for HPLC. They also examine the relation between optical rotation at the detector wavelength of 675 nm and the sodium D line. The authors consider the sensitivity, linear dynamic range, and effect of solvent composition on rotation and its general use as an HPLC detector for chiral compounds

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Quality Control of (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Vitamin D3: synthesis of seco C-9,11,21-trisnor-17-methyl-1α, 25-dihydroxyvitamin D3 analogues. Author is Wu, Yusheng; Sabbe, Katrien; De Clercq, Pierre; Vandewalle, Maurits; Bouillon, Roger; Verstuyf, Annemieke.

The synthesis and biol. activities of seco C-9,11,21-trisnor-17-methyl-1α,25-dihydroxyvitamin D3 analogs (D-ring analogs) are described. Synthesized analogs were evaluated for their affinity for the vitamin D receptor, in vivo calcemic effects in mice, and anti-proliferative activity in various cell lines.

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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com

Formula: C10H16O4. 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: (1S,3R)-1,2,2-Trimethylcyclopentane-1,3-dicarboxylic acid, is researched, Molecular C10H16O4, CAS is 560-09-8, about Enantiopure Metal-Organic Framework Thin Films: Oriented SURMOF Growth and Enantioselective Adsorption. Author is Liu, Bo; Shekhah, Osama; Arslan, Hasan K.; Liu, Jinxuan; Woell, Christof; Fischer, Roland A..

The LPE growth of [Zn2[(+)cam]2(dabco)n] [(+)cam = (1R,3S)-(+)-camphoric acid, dabco = 1,4-diazabicyclo[2.2.2]octane] and its enantiomeric form and their application to the direct QCM (quartz crystal microbalance) monitoring of the uptake of a pair of enantiomeric guest mols., namely (2R,5R)-2,5-hexanediol (R-HDO) and (2S,5S)-2,5-hexanediol (S-HDO) from the gas phase under flow conditions are described. As examined by surface X-ray diffraction in out-of-plane and in-plane modes, the SURMOFs (surface-attached MOFs) were grown in (110) and (001) orientations on SAMs of MHDA and PPMT, with MHDA = 16-mercaptohexadecanoic acid; PPMT = (4,(4-pyridyl)phenyl)methanethiol, resp., on Au-coated QCM substrates. The difference of absolute uptake and absorption rate for each of the chosen enantiomeric probe mols. R-HDO and S-HDO is clear, and show significant enantioselectivity.

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