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This manuscript describes a highly enantioselective conjugate hydrazine addition to alpha,beta-unsaturated imides. The achiral template used has a significant impact on product enantioselectivity. Reactions at lower temperatures provide a protocol to add substituted hydrazines with selectivity resulting in the formation of a single pyrazolidinone product (>98:2 selectivity). A variety of chiral pyrazolidinones with potential as chiral auxiliaries and ligands are accessible through the new conjugate addition methodology. Copyright

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Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H998NO – PubChem

Application In Synthesis of Oxazolidin-2-one, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.497-25-6, Name is Oxazolidin-2-one, molecular formula is C3H5NO2. In a Article，once mentioned of 497-25-6

Small neutral carbonyl compounds (2-5) form very stable complexes (Ka’s ranging from 1E3 to 1E5 M-1) with ethyl 2,6-diaminonicotinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate (1) in dichloromethane.The dominant driving force for complexation between the host and guest.

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Oxazolidine – Wikipedia,
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Di(2-ethylhexyl) phthalate (DEHP) is the most common phthalate ester, which has been used as a plasticizer for the production of numerous polymers, particularly polyvinyl chloride (PVC). Many other groups have synthesized meso-DEHP indicating interest in this molecule, but we are the first to synthesize enantiomerically pure di[(R)-2-ethylhexyl] phthalate. We report herein, for the first time, the isolation-from the cultures of Bacillus thuringiensis, B. subtilis, and B. velezensis strains-of di[(R)-2-ethylhexyl] phthalate, enantiomerically pure and in good yields: its biological activity against bacteria and fungi was probed and for the first time its synthesis was done.

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Oxazolidine – Wikipedia,
Oxazolidine | C3H407NO – PubChem

Related Products of 497-25-6, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 497-25-6, molcular formula is C3H5NO2, introducing its new discovery.

Benzophenone is photoreduced by amides and lactams.The hydrogen atom alpha to the nitrogen atom is abstracted regioselectively; coupling of the two resulting radicals leads to adducts with a 1-phenylethanolamide structure.The use of this general reaction in synthetic reactions is demonstrated: adducts of benzophenone with amides, lactams, 2,4-imidazolinediones, tetrahydro-2H-1,3-oxazin-2-one and 2-oxazolidinone, and of dibenzosuberone, 9H-xanthenone, 9H-thioxanthenone and alpha-tetralone with 1-methyl-2-pyrrolidinone, N,N-dimethylacetamide and N,N-diethylacetamide are described.Kinetic parameters for dibenzosuberone and 9H-thioxanthenone are given.Knowledge of the rate constants of photoreduction (kr) and autodeactivation (kTa) allows optimization of the experimental procedure to provide adducts in good yields.

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Oxazolidine – Wikipedia,
Oxazolidine | C3H567NO – PubChem

Product Details of 497-25-6, Some examples of the diverse research done by chemistry experts include discovery of new medicines and vaccines, improving understanding of environmental issues, and development of new chemical products and materials.497-25-6, Name is Oxazolidin-2-one, molecular formula is C3H5NO2. In a Article，once mentioned of 497-25-6

Condensation of malononitrile, ethylcyanacetate and isopropylidene malonate with various O-ethyl cyclic carbamates leads to alpha-(tetrahydroxazole-1,3-ylidene-2) and alpha-(tetrahydroxazine-1,3-ylidene-2) malononitriles, ethylcyanacetates and isopropylidene malonates.

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Oxazolidine – Wikipedia,
Oxazolidine | C3H631NO – PubChem

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The electronic structure of a series of organic molecules of general formula <*>RN-(CH2)2-X-C=Y, which are also of interest in inorganic chemistry because of their properties as ligands towards metals, have been investigated by X-ray photoelectron spectroscopy.The results suggest a general picture of atomic charge distribution within the investigated molecules, and allow an assessment of the effect of the different substituent groups X, Y, R (X=NR’, O, S, CH2; Y=O, S, Se; R, R’=H, alkyl) on the electronic structure of the ligands.Satisfactory correlation is foundbetween experimental binding energies and computed CNDO/2 atomic charges, after correction for intramolecular Madelung potentials.

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Oxazolidine – Wikipedia,
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Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. Reference of 497-25-6. Introducing a new discovery about 497-25-6, Name is Oxazolidin-2-one

The alkylation reactions of enolates derived from the highly diastereoselective conjugate additions of lithium (R)-N-benzyl-N-alpha-methylbenzylamide (R)-1 to N,N-dimethyl crotonamide 2 and N,N-dimethyl cinnamide 3 have been investigated.The alkylations of enolates derived from 3 are shown to afford anti-alpha-alkyl-beta-amino carboxamides with excellent stereocontrol: the stereochemistry is assigned with the aid of a single crystal X-ray structure of (2R,3S,alphaR)-N,N-dimethyl-2-benzyl-3-phenyl-3-(N-benzyl-N-alpha-methylbenzylamino)propanamide (2R,3S,alphaR)-10.As a result of the difficulty encountered is hydrolysing these hindered beta-amino amides such as 10, an alternative procedure is developed involving conjugate addition-alkylations with alpha,beta-unsaturated N-acyloxazolidin-2-ones as substrates, giving selectively alkylated products which are susceptible to reductive cleavage.

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Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H475NO – PubChem

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The equilibrium C-H bond acidities of three cyclic carboxylic esters wherein the alkoxycarbonyl group is locked into an E conformation have been shown to be about 4 pKHA units greater than those of their acyclic analogues.Also, replacement of an alpha-methylene group in 2-indanone by an oxygen atom to form a cyclic ester of this type has been shown to cause an acidity increase of a comparable magnitude.These acidity increases are roughly one-half that observed for Meldrum’s acid, a similarly constituted cyclic diester, relative to that of an acyclic analogue, dimethyl malonate.A similar increase in the N-H acidity of an acyclic carbamate was found to occur when its alkoxycarbonyl moiety was locked into a five-membered (2-oxazolidone) ring.These structural changes were found to cause little or no change in the BDEs of the acidic C-H or N-H bonds in these esters or carbamates.On the other hand, introduction of a C=C bond into 2-oxazolidone caused a 15 kcal/mol decrease in BDE.

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Oxazolidine – Wikipedia,
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Pyrromethenone 7, the C,D-ring segment of phytochrome (Pr, 4), has been prepared in an efficient fashion employing three new strategies. Each of these has potential advantages for the synthesis of labeled material. Our first approach is related to the Gossauer synthesis, with the difference that strong alkali is avoided in the condensation of the C- and D-ring components 8 and 17. The key silyloxypyrrole 17 was readily prepared on multigram scales beginning with inexpensive butyrolactone (10). A second synthesis began with 2-acetylbutyrolactone (41). The key steps involved conversion of 41 to the Z-enoltriflate 42, followed by Pd(0)-catalyzed coupling with trimethylsilylacetylene, p-chlorophenylselenide ring opening, and finally, amidation to afford the ring-D synthon 45 having the proper geometry and oxidation state for conversion to 7. Sonogashira coupling of 45 with the iodopyrrole 22, followed by oxidative elimination, and F- -induced 5-exo-dig cyclization of the resultant pyrroloalkyne 47, then completed the synthesis. In similar fashion, we have also prepared pyrromethenone 6, the C,D-ring segment of phycocyanin (2).

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Oxazolidine – Wikipedia,
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A highly efficient Bi(OTf)3-catalyzed multicomponent synthesis of arylglycines from readily available starting materials is described. The reaction proceeds under mild conditions and provides a general route to various N-protected arylglycines. the Partner Organisations 2014.

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Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H964NO – PubChem