Tag: M.W:100-200

Recommanded Product: 66-71-7. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Luminescence behavior of PMMA films doped with Tb(III) and Eu(III) complexes. Author is Knyazev, Andrey A.; Krupin, Aleksandr S.; Galyametdinov, Yuriy G..

Novel hybrid systems based on the poly(Me methacrylate) (PMMA) matrix and Eu(III) and Tb(III) tris(β-diketonates) complexes with 1,10-phenanthroline were synthesized and analyzed as light-conversion materials. Solutions of the Tb(III) and Eu(III) complexes doped into PMMA were spin-coated to fabricate films with various concentrations of luminophores. Long hydrocarbon substituents in the structure of complexes inhibit their crystallization In turn, it allows to vary the luminophore content in a polymer matrix in a broader range and achieve the maximum of emission with higher concentrations of dopants. The addition of the Tb(III) complex to the system results in a 26% increase in the relative luminescence quantum yield of the Eu(III) ions due to an addnl. energy transfer from the Tb(III) compound The results of this work illustrate that although the Eu(III) and Tb(III) complexes exhibit lower rate and efficiency of energy transfer than their well-known Tb(acac)3 and Eu(tta)3 analogs, the structural features of lanthanide complexes allow to efficiently dope a PMMA matrix with considerably larger amounts of luminophores. It offers broader application opportunities for the coordination Ln(III) compounds as polyfunctional materials for optics and optoelectronics.

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Electric Literature of C5H13NO. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (S)-1-(Dimethylamino)propan-2-ol, is researched, Molecular C5H13NO, CAS is 53636-17-2, about Rapid determination of enantiomeric excess using infrared thermography. Author is Millot, Nicolas; Borman, Phil; Anson, Mike S.; Campbell, Ian B.; Macdonald, Simon J. F.; Mahmoudian, Mahmoud.

IR thermog. (IRT) is presented as a novel technique to screen a potentially large number of asym. catalysts or substrates in a high-throughput fashion. IRT was used as a simple, rapid, and practical approach for initial screening of the substrate specificity of Candida antarctica lipase. This was carried out using a 96-well microtiter plate format. Potential advantages and limitations of IRT for the enzymic stereoselective acylation of primary and secondary alcs. of interest are discussed.

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Synthetic Route of C8H8FN. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Palladium-Catalyzed Direct and Specific C-7 Acylation of Indolines with 1,2-Diketones. Author is Xie, Guilin; Zhao, Yuhan; Cai, Changqun; Deng, Guo-Jun; Gong, Hang.

Herein, a palladium-catalyzed direct and specific C-7 acylation of indolines in the presence of an easily removed directing group was developed. This strategy usually considered as a practical strategy for the preparation of acylated indoles because indoline can be easily converted to indole under oxidation conditions. In particular, these strategy greatly improved the alkacylation yield of indolines for which only an unsatisfactory yield could be achieved in the previous studies. Furthermore, the reaction can be scaled up to gram level in the standard reaction conditions with a much lower palladium loading (1 mol %).

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Application of 53562-86-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Highly Enantioselective Hydrogenation of β-Keto Esters under Mild Conditions. Author is Burk, Mark J.; Harper, T. Gregory P.; Kalberg, Christopher S..

New bis(phospholane)-Ru catalysts have been developed and shown to allow the highly enantioselective hydrogenation of β-keto esters under mild conditions. In particular, the catalyst derived from i-Pr-BPE-RuBr2 [i-Pr-BPE = 1,2-bis(trans-2,5-diisopropylphospholano)ethane] performs efficiently under 60 psig hydrogen and provides a variety of β-hydroxy esters with enantioselectivities in the range 98-99% ee. Enantiomerically pure β-hydroxy esters are key intermediates in the synthesis of chiral phospholane ligands. On this basis, rare examples of “”asym. ligand breeder”” processes have been developed for the self-generative synthesis of the i-Pr-BPE and Cy-BPE ligands.

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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.Hirose, Akane; Maeda, Hayato; Tonouchi, Akio; Nehira, Tatsuo; Hashimoto, Masaru researched the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0 ).Application of 53562-86-0.They published the article 《Neomacrophorin I, II, and III, novel drimenyl cyclohexanes with hydroxylated butanoates from Trichoderma sp. 1212-03》 about this compound( cas:53562-86-0 ) in Tetrahedron. Keywords: neomacrophorin Trichoderma. We’ll tell you more about this compound (cas:53562-86-0).

Neomacrophorins I (1), II (2), and III (3) were isolated from the culture broth of Trichoderma sp. 1212-03 that was collected at Shirakami Mountainous area in Japan. Structural analyses disclosed that these resemble known macrophorins but possess axial-hydroxy group at C3 as well as different side chains at C7′. These are diastereomeric forms of macrophorins for 5′,6′-epoxide functionality. The NMR analyses suggested their relative configurational relationship between the C1-C15 drimene and C1′-C7′ epoxyquinone moieties. ECD spectral discussions verified them particularly for C5′,C6′-epoxyquinone (1), C5′,C6′-epoxysemiquinone (2 and 3), and 2″”,3″”-dihydroxybutanoate moiety in 1 and 2. The configuration of C3″”-stereocenter of 3 was determined by chiral GC-MS after converting into Me (S)-3″”-hydroxybutanoate by basic of 3 methanolysis. Biol. assays disclosed that 1 induces hyphal branching of Cochliobolus miyabeanus as well as cytotoxicity against human colorectal cancer COLO 201.

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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: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Rhodium-catalyzed hydrofunctionalization: Enantioselective coupling of indolines and 1,3-dienes.Application of 2343-22-8.

We communicate a strategy for the hydrofunctionalization of 1,3-dienes via Rh-hydride catalysis. Conjugated dienes are coupled to nucleophiles to demonstrate the feasibility of novel C-C, C-O, C-S, and C-N bond forming processes. In the presence of a chiral JoSPOphos ligand, hydroamination generates chiral allylic amines with high regio- and enantioselectivity. Tuning both the pKa and steric properties of an acid-additive is critical for enantiocontrol.

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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 Synthesis of optically active methadones, LAAM and bufuralol by lipase-catalysed acylations, published in 2003-03-07, which mentions a compound: 53636-17-2, Name is (S)-1-(Dimethylamino)propan-2-ol, Molecular C5H13NO, Name: (S)-1-(Dimethylamino)propan-2-ol.

(R)- and (S)-Methadones and levo-α-acetylmethadol (LAAM) have been synthesized starting from lipase-catalyzed acylation of dimethylaminopropan-2-ol. An approach to the synthesis of (R)-bufuralol is also presented.

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Reference of (S)-Methyl 3-hydroxybutanoate. 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)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about A new efficient synthesis of both enantiomers of macrosphelide core: A potential precursor for functionalized macrosphelides. Author is Matsuya, Yuji; Kawaguchi, Takanori; Nemoto, Hideo; Nozaki, Hiroshi; Hamada, Hiroki.

The asym. synthesis of a macrosphelide core (I) and its enantiomer was achieved from (S)- or (R)-3-hydroxybutyrate in excellent yields. These compounds are potentially useful precursors for the preparation of biol. important macrosphelide analogs.

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Safety of 6-Acetylbenzo[d]oxazol-2(3H)-one. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 6-Acetylbenzo[d]oxazol-2(3H)-one, is researched, Molecular C9H7NO3, CAS is 54903-09-2, about Acylation of 2,3-dihydrobenzoxazol-2-one in a two-step method involving an acyl migration. Author is Cotelle, Nicole; Cotelle, Philippe; Lesieur, Daniel.

Acylation of dihydrobenzoxazolone I (R = R1 = H) with (R2CO)2O or with R2COCl in pyridine gave 90-99% I (R = R2 = Me, Pr, Me2CHCH2, Ph, o-, p-ClC6H4, etc.; R1 = H) (II). Treatment of II with polyphosphoric acid caused acyl migration to give 80-99% I (R = H, R1 = R2).

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Electric Literature of C5H10O3. 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)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Total synthesis of macrosphelides B and A.

An efficient total synthesis of macrosphelide B (I; R1R2 = O) has been developed in which the C(5)-O(10) and the C(11)-O(16) fragments were prepared from (S)-1-(2-furyl)ethanol of >98% ee via oxidation of the furan part. In addition, macrosphelide B was transformed stereoselectively into macrosphelide A (I; R1 = H, R2 = OH) by reduction followed by Mitsunobu inversion.

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