Heterocyclic Building Blocks-Oxazolidine

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Revisiting the Julia-Colonna enantioselective epoxidation: Supramolecular catalysis in water

We describe an efficient epoxidation process leading to chiral epoxyketones using the reusable homo-oligopeptide poly-l-leucine (PLL) in pure water, without any organic co-solvent. A range of substituted epoxyketones can be accessed with good conversions and high enantioselectivities. Based on the experimental results and computational studies, we propose a mechanism that demonstrates the importance of both the alpha-helical structure and the presence of a hydrophobic groove of the homo-oligopeptide catalyst for reactivity and selectivity.

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Oxazolidine | C3H1495NO – PubChem

 

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Vinyl ester resin modified with acrylated epoxidised soybean (AESO) and linseed (AELO) oils: Effect of additional urethane crosslinking

Bisphenol A-based vinyl ester resin (VE) was modified with acrylated epoxidised soybean and linseed oils (AESO and AELO, respectively) in 10 wt.%. The double bond/epoxy ratio in these functionalised vegetable oils was practically the same, i.e. 30/70%, allowing us to deduce effects caused by the different unsaturations in the parent oils. The crosslink density of the resins was enhanced by adding polyisocyanate. The glass transition temperature (Tg) of the hybrids was determined by differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). Resistance to thermal degradation was assessed by thermogravimetric analysis (TGA). The fracture toughness and energy (Kc and Gc, respectively) were determined on compact tension specimens at room temperature. Incorporation of AESO and AELO reduced the Tg of VE along with slight reductions in the Kc and Gc data. The Tg reduction was less for AELO than AESO which was attributed to the higher functionality of AELO compared to AESO. Urethane crosslinking of VE (VEUH) prominently enhanced the Tg. Modification of VEUH with AES(L)O enhanced the Tg due to additional crosslinks. Urethane hybridisation was associated with a strong decrease in both Kc and Gc compared to those of the parent VE. Kc and Gc of VEUH did not change practically as a function of blending with AES(L)O. Incorporation of AES(L)O reduced the resistance to thermal degradation of both VE and VEUH.

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Oxazolidine | C3H571NO – PubChem

 

Electric Literature of 3190-70-3, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.3190-70-3, Name is (S)-4-Isobutyloxazolidine-2,5-dione, molecular formula is C7H11NO3. In a Article£¬once mentioned of 3190-70-3

15N NMR Spectroscopy; 24-Chemical Shifts and Coupling Constants of alpha-Amino Acid N-Carboxyanhydrides and Related Heterocycles

The chemical shifts of amino acid N-carboxyanhydrides (NCAs) and cyclic or linear urethanes are less sensitive to solvent effects than those of amides and lactams.The values of the one-bond 15N-1H coupling constants depend on the solvent and are 5-8 Hz larger than those of ureas and amides.The 15N-13C coupling constant of the N-CO group is also unusually high, while that of the N-CH group lies within the range known for N-acetylated aliphatic amines.The one-bond 15N-13C coupling constant was found to be insensitive to conformational changes.

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Oxazolidine | C3H1510NO – PubChem

 

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INHIBITORS OF PRENYL-PROTEIN TRANSFERASE

The present invention is directed to peptidomimetic piperazine-containing macrocyclic compounds which inhibit a prenyl-protein transferase (FTase) and the prenylation of the oncogene protein Ras. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting prenyl-protein transferase and the prenylation of the oncogene protein Ras.

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Oxazolidine | C3H132NO – PubChem

 

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. name: (R)-4-Benzyl-2-oxazolidinone. Introducing a new discovery about 102029-44-7, Name is (R)-4-Benzyl-2-oxazolidinone

SPIRO COMPOUNDS AND PHARMACEUTICAL USE THEREOF

The Spiro compound represented by the following general formula [Ia], its pharmaceutically acceptable salt or a solvate thereof

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One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, category: oxazolidine, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 497-25-6, Name is Oxazolidin-2-one, molecular formula is C3H5NO2

Synthesis of new beta- and gamma-aminopyrrolidinephosphonates via 1,3-dipolar cycloaddition of substituted vinylphosphonates

Synthesis of alpha- and beta-(aminomethyl)vinylphosphonates was achieved from vinyl bromide via a cross-coupling reaction with triethyl phosphite and by cross-metathesis of allyl bromide and vinylphosphonate, respectively. The 1,3-dipolar cycloaddition of these vinylphosphonates with a dipole in the presence of trifluoroacetic acid afforded selectively the beta-aminopyrrolidinephosphonates. Syntheses of cis- and trans-gamma-aminopyrrolidinephosphonates are also described.

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In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Recommanded Product: 95715-86-9, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 95715-86-9, name is Methyl (R)-N-Boc-2,2-dimethyloxazolidine-4-carboxylate. In an article£¬Which mentioned a new discovery about 95715-86-9

INDOLE COMPOUND AS INHIBITOR OF NECROSIS

The present invention relates to an indole compound represented by formula (1), a pharmaceutically acceptable salt or isomer thereof, a composition for prevention or treatment of necrosis and necrosis-associated diseases, and a method for preparing the composition, the composition comprising the indole compound or the pharmaceutically acceptable salt or isomer thereof as an active ingredient.

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Stereospecific Nucleophilic Addition Reactions to Olefins. Addition of Thiols to alpha,beta-Unsaturated Carboxylic Acid Derivatives

Stereospecific nucleophilic addition of thiols to derivatives of alpha,beta-unsaturated carboxylic acids is described.The additions are carried out at room temperature in the presence of a catalytic amount of lithium thiolate and an excess of thiol as a proton source.Erythro and threo adducts are obtained with high diastereoselectivity from E and Z olefins, respectively.This anti addition suggests that the enolate generated by nucleophilic addition undergoes rapid protonation prior to conformational change in the intermediate.

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In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 875444-08-9, name is (4S,5R)-5-(3,5-Bis(trifluoromethyl)phenyl)-4-methyloxazolidin-2-one, introducing its new discovery. name: (4S,5R)-5-(3,5-Bis(trifluoromethyl)phenyl)-4-methyloxazolidin-2-one

NOVEL OXAZOLIDINONE DERIVATIVE AS CETP INHIBITOR, ITS PREPARATION METHOD, AND PHARMACEUTICAL COMPOSITION COMPRISING THE SAME

Disclosed are a novel oxazolidinone derivative exhibiting inhibitory activity against CETP, a preparation method thereof, and a pharmaceutical composition comprising the same. Exhibiting excellent inhibitory activity against CETP, the oxazolidinone derivative can be effectively applied to the prevention or treatment of various CETP enzyme activity- or HDL cholesterol level-related diseases such as dyslipidemia, atherosclerosis, and coronary heart disease.

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Oxazolidine | C3H2773NO – PubChem

 

Related Products of 102029-44-7, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 102029-44-7, Name is (R)-4-Benzyl-2-oxazolidinone, molecular formula is C10H11NO2. In a Patent£¬once mentioned of 102029-44-7

NITROGEN-CONTAINING HETEROCYCLIC COMPOUND AND USE THEREOF

The present invention relates to a compound represented by the formulawherein ring A is a nitrogen-containing heterocycle optionally further having substituent(s), ring B is an aromatic ring optionally having substituent(s), ring C is a cyclic group optionally having substituent(s), R1 is a hydrogen atom, a hydrocarbon group optionally having substituent(s), an acyl group, a heterocyclic group optionally having substituent(s) or an amino group optionally having substituent(s), R2 is an optionally halogenated C1-6 alkyl group, m and n are each an integer of 0 to 5, m+n is an integer of 2 to 5, and is a single bond or a double bond, or a salt thereof and the like. Since the compound has a superior tachykinin receptor antagonistic action, and is useful as an agent for the prophylaxis or treatment of various diseases such as lower urinary tract diseases, gastrointestinal diseases, central nervous system diseases and the like.

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