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A convenient procedure for the formylation of amines and alcohols using cyanomethyl formate

A simple metyod for the direct formylation of amines using cyanomethyl formate is described. The formylation succeeds in moderate to high yields under mild and neutral conditions. Thus, formamides 2a-f, 2i-m are obtained at room temperature. A chemoselective N-formylation is achieved in the case of ethanolamine. The formylation of nitroanilines and the O-formylation of alcohols only succeeds in the presence of a catalytic amount of imidazole leading to 2g,h and 3a-e, respectively.

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Catalytic enantioselective synthesis of alpha-arylaminocyclobutanones

A catalytic enantioselective synthesis of alpha-arylaminocyclobutanones from racemic alpha-hydroxycyclobutanone and a selection of N-alkylanilines has been established, via a tandem condensation/keto-enol tautomerization process reminiscent of the Amadori and Heyns rearrangements.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Nucleophilic Amination and Etherification of Aryl Alkyl Thioethers

A transition-metal-free protocol capable of synthesizing diarylated aniline derivatives is reported. This method could be further employed to prepare aryl alkyl ethers. A wide range of thioethers, anilines, as well as alcohols were tolerated thanks to the mild reaction conditions. The strength of our method was demonstrated by performing a gram-scale reaction (20 mmol) followed by conversion of the nitrile group into synthetically useful aldehyde, ketone, and carboxylic acid.

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The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 33282-15-4 is helpful to your research. Application of 33282-15-4

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N-formylation of amines catalyzed by nanogold under aerobic oxidation conditions with MeOH or formalin

Gold nanoclusters stabilized by poly(N-vinyl-2-pyrrolidone) (Au:PVP) are active and selective catalysts for N-formylation of amines under aerobic oxidation using methanol or formalin as a formyl source.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Selective formylation or methylation of amines using carbon dioxide catalysed by a rhodium perimidine-based NHC complex

Carbon dioxide can play a vital role as a sustainable feedstock for chemical synthesis. To be viable, the employed protocol should be as mild as possible. Herein we report a methodology to incorporate CO2 into primary, secondary, aromatic or alkyl amines catalysed by a Rh(i) complex bearing a perimidine-based NHC/phosphine pincer ligand. The periminide-based ligand belongs to a class of 6-membered NHC ligand accessed through chelate-assisted double C-H activation. N-Formylation and -methylation of amines were performed using a balloon of CO2, and phenylsilane as the reducing agent. Product selectivity between formylated and methylated products was tuned by changing the solvent, reaction temperature and the quantity of phenylsilane used. Medium to excellent conversions, as well as tolerance to a range of functional groups, were achieved. Stoichiometric reactions with reactants employed in catalysis and time course studies suggested that formylation and methylation reactions of interest begin with hydrosilylation of CO2 followed by reaction with amine substrates.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Access to newly functionalized imidazole derivatives: Efficient synthesis of novel 5-amino-2-thioimidazoles using propylphosphonic anhydride (T3P)

We describe here an efficient method to synthesize 5-amino-2-thioimidazole compounds by T3P-mediated cyclization of N-acetamidoisothiourea intermediates. The newly functionalized 5-amino-2-thioimidazole compounds are finally obtained in 5 steps from an amine as starting block.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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HISTONE DEMETHYLASE INHIBITORS

This disclosure relates to compounds that inhibit histone demethylase activity. In particular, the disclosure relates to compounds that inhibit histone lysine demethylase KDM5B, pharmaceutical compositions and methods of use, such as methods of treating cancer using the compounds and pharmaceutical compositions disclosed herein.

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Isoxazole – Wikipedia,
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Efficient synthesis of N,N-disubstituted 5-aminothiophene-2-carboxaldehydes by nucleophilic aromatic substitution in water

We have developed the first synthesis of N,N-disubstituted 5-aminothiophene-2-carboxaldehydes by Nucleophilic Aromatic Substitution of 5-bromothiophene-2-carboxaldehyde in water. This study shows selectivity between primary and secondary amines leading to the corresponding imines or amino derivatives respectively.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Asymmetric alpha-arylation of amino acids

Quaternary amino acids, in which the alpha-carbon that bears the amino and carboxyl groups also carries two carbon substituents, have an important role as modifiers of peptide conformation and bioactivity and as precursors of medicinally important compounds1,2. In contrast to enantioselective alkylation at this alpha-carbon, for which there are several methods3?8, general enantioselective introduction of an aryl substituent at the alpha-carbon is synthetically challenging9. Nonetheless, the resultant alpha-aryl amino acids and their derivatives are valuable precursors to bioactive molecules10,11. Here we describe the synthesis of quaternary alpha-aryl amino acids from enantiopure amino acid precursors by alpha-arylation without loss of stereochemical integrity. Our approach relies on the temporary formation of a second stereogenic centre in an N?-arylurea adduct12 of an imidazolidinone derivative6 of the precursor amino acid, and uses readily available enantiopure amino acids both as a precursor and as a source of asymmetry. It avoids the use of valuable transition metals, and enables arylation with electron-rich, electron-poor and heterocyclic substituents. Either enantiomer of the product can be formed from a single amino acid precursor. The method is practical and scalable, and provides the opportunity to produce alpha-arylated quaternary amino acids in multi-gram quantities.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Spirocyclization by palladium-catalyzed domino heck-direct C-H arylation reactions: Synthesis of spirodihydroquinolin-2-ones

Treatment of a DMA solution of anilide 1 with a catalytic amount of palladium acetate (0.025 equiv) and XPhos (0.05 equiv) in the presence of potassium carbonate (2.0 equiv) at 100 C afforded dihydroquinolin-2-ones spiro-fused to dihydrofuranyl, indolinyl, and indanyl 2 in good to excellent yields. The reaction went through a domino sequence involving a 5-exo-trig Heck cyclization followed by an intramolecular direct C-H functionalization.

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Reference£º
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem