Month: November 2022

Goto, Akihiro published the artcileRhI-catalyzed hydration of organonitriles under ambient conditions, Recommanded Product: 2-Methoxyacetamide, the main research area is hydration nitrile rhodium catalyst; amide preparation.

The hydration of organonitriles catalyzed by a RhI(OMe) species under nearly pH-neutral and ambient conditions (25°C, 1 atm) is chemoselective and high-yielding (93 to 99%) and has a broad substrate scope, and may thus be complementary to enzymic hydration methods for the introduction of a terminal amido group (CONH2) onto a carbon chain.

Angewandte Chemie, International Edition published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Recommanded Product: 2-Methoxyacetamide.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Tomas-Mendivil, Eder published the artcileExploring Rhodium(I) Complexes [RhCl(COD)(PR3)] (COD = 1,5-Cyclooctadiene) as Catalysts for Nitrile Hydration Reactions in Water: The Aminophosphines Make the Difference, Synthetic Route of 16332-06-2, the main research area is amide preparation; rhodium phosphine catalyst preparation hydration nitrile; rufinamide preparation.

Several rhodium(I) complexes, [RhCl(COD)(PR3)], containing potentially cooperative phosphine ligands, have been synthesized and evaluated as catalysts for the selective hydration of organonitriles into amides in water. Among the different phosphines screened, those of general composition P(NR2)3 led to the best results. In particular, complex [RhCl(COD){P(NMe2)3}] was able to promote the selective hydration of a large range of nitriles in water without the assistance of any additive, showing a particularly high activity with heteroaromatic and heteroaliph. substrates. Employing this catalyst, the antiepileptic drug rufinamide was synthesized in high yield by hydration of 4-cyano-1-(2,6-difluorobenzyl)-1H-1,2,3-triazole. For this particular transformation, complex [RhCl(COD){P(NMe2)3}] was more effective than related ruthenium catalysts.

ACS Catalysis published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Synthetic Route of 16332-06-2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Matsuoka, Aki published the artcileHydration of nitriles to amides by a chitin-supported ruthenium catalyst, Related Products of ethers-buliding-blocks, the main research area is amide preparation; nitrile chitin ruthenium catalyst hydration.

Chitin-supported ruthenium (Ru/chitin) promoted the hydration of nitriles to carboxamides under aqueous conditions. The nitrile hydration was performed on a gram-scale and was compatible with the presence of various functional groups including olefins, aldehydes, carboxylic esters and nitro and benzyloxycarbonyl groups. The Ru/chitin catalyst was easily prepared from com. available chitin, ruthenium(III) chloride and sodium borohydride. Anal. of Ru/chitin by high-resolution transmission electron microscopy indicated the presence of ruthenium nanoparticles on the chitin support.

RSC Advances published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Knapp, Spring Melody M. published the artcileCatalytic Nitrile Hydration with [Ru(η6-p-cymene)Cl2(PR2R’)] Complexes: Secondary Coordination Sphere Effects with Phosphine Oxide and Phosphinite Ligands, Recommanded Product: 2-Methoxyacetamide, the main research area is cymene ruthenium phosphine oxide phosphinite preparation catalyst nitrile hydration; crystal mol structure cymeneruthenium phosphine oxide phosphinite complex; mol structure calculation cymeneruthenium phosphine oxide phosphinite nitrile hydration.

The rates of nitrile hydration reactions were investigated using [Ru(η6-p-cymene)Cl2(PR2R’)] complexes as homogeneous catalysts, where PR2R’ = PMe2(CH2P(O)Me2), PMe2(CH2CH2P(O)Me2), PPh2(CH2P(O)Ph2), PPh2(CH2CH2P(O)Ph2), PMe2OH, P(OEt)2OH. These catalysts were studied because the rate of the nitrile-to-amide hydration reaction was hypothesized to be affected by the position of the hydrogen bond accepting group in the secondary coordination sphere of the catalyst. Experiments showed that the rate of nitrile hydration was fastest when using [Ru(η6-p-cymene)Cl2PMe2OH]: i.e., the catalyst with the hydrogen bond accepting group capable of forming the most stable ring in the transition state of the rate-limiting step. This catalyst is also active at pH 3.5 and at low temperatures-conditions where α-hydroxynitriles (cyanohydrins) produce less cyanide, a known poison for organometallic nitrile hydration catalysts. The [Ru(η6-p-cymene)Cl2PMe2OH] catalyst completely converts the cyanohydrins glycolonitrile and lactonitrile to their corresponding α-hydroxyamides faster than previously investigated catalysts. [Ru(η6-p-cymene)Cl2PMe2OH] is not, however, a good catalyst for acetone cyanohydrin hydration, because it is susceptible to cyanide poisoning. Protecting the -OH group of acetone cyanohydrin was an effective way to prevent cyanide poisoning, resulting in quant. hydration of acetone cyanohydrin acetate.

Organometallics published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Recommanded Product: 2-Methoxyacetamide.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Babon, Juan C. published the artcileHydration of Aliphatic Nitriles Catalyzed by an Osmium Polyhydride: Evidence for an Alternative Mechanism, Formula: C3H7NO2, the main research area is aliphatic nitrile hydration mechanism osmium polyhydride catalyst crystal structure.

The hexahydride OsH6(PiPr3)2 competently catalyzes the hydration of aliphatic nitriles to amides. The main metal species under the catalytic conditions are the trihydride osmium(IV) amidate derivatives OsH3{κ2-N,O-[HNC(O)R]}(PiPr3)2, which have been isolated and fully characterized for R = iPr and tBu. The rate of hydration is proportional to the concentrations of the catalyst precursor, nitrile, and water. When these exptl. findings and d. functional theory calculations are combined, the mechanism of catalysis has been established. Complexes OsH3{κ2-N,O-[HNC(O)R]}(PiPr3)2 dissociate the carbonyl group of the chelate to afford κ1-N-amidate derivatives, which coordinate the nitrile. The subsequent attack of an external water mol. to both the C(sp) atom of the nitrile and the N atom of the amidate affords the amide and regenerates the κ1-N-amidate catalysts. The attack is concerted and takes place through a cyclic six-membered transition state, which involves Cnitrile···O-H···Namidate interactions. Before the attack, the free carbonyl group of the κ1-N-amidate ligand fixes the water mol. in the vicinity of the C(sp) atom of the nitrile.

Inorganic Chemistry published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Formula: C3H7NO2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Nirmala, Muthukumaran published the artcileRuthenium(II) complexes incorporating salicylaldiminato-functionalized N-heterocyclic carbene ligands as efficient and versatile catalysts for hydration of organonitriles, Safety of 2-Methoxyacetamide, the main research area is salicylaldiminato imidazolidene heterocyclic carbene ruthenium preparation catalyst hydration organonitrile.

Authors describe a new synthetic procedure for synthesis of ruthenium(II) complexes containing salicylaldiminato functionalized mixed N-heterocyclic carbene (NHC) ligand and phosphine co-ligand. The complexes (3a-3d) have been obtained in good to excellent yields by transmetalation from the corresponding Ag-NHC complexes (2a-2d) as carbene transfer reagents. All the [Ru-NHC] complexes have been characterized by elemental analyses, spectroscopic methods as well as ESI mass spectrometry. The ligands 1a-1d show their versatility by switching to be O,N,C-chelating in these ruthenium(II) complexes. The resulting complexes have been evaluated as potential catalysts for the selective hydration of nitriles to primary amides, and related amide bond forming reactions, in environmentally friendly medium. The reaction tolerated ether, hydroxyl, nitro, bromo, formyl, pyridyl, benzyl and alkyl functional groups. The catalyst was stable for weeks and could be recovered and reused more than six times without significant loss of activity.

Inorganica Chimica Acta published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Safety of 2-Methoxyacetamide.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Fan, Qingqing published the artcileNickel-Catalyzed Sonogashira Coupling Reactions of Nonactivated Alkyl Chlorides under Mild Conditions, Safety of (2-Chloroethoxy)benzene, the main research area is nickel catalyzed Sonogashira coupling reaction nonactivated alkyl halide alkyne; bidentate phosphinobenzenethiol phosphinobenzeneselenol nickel chelate preparation Sonogashira catalyst; crystal structure bidentate phosphinobenzenethiol nickel chloride chelate; mol structure bidentate phosphinobenzenethiol nickel chloride chelate.

The two Ni chlorides 1 and 2 with [P,S] and [P,Se] bidentate ligands, resp., were synthesized and used as catalysts for Sonogashira coupling reaction. Both 1 and 2 are efficient catalysts for Sonogashira C(sp3)-C(sp) coupling reactions. Complex 1 has better catalytic activity than complex 2. In a combination of 1 mol % catalyst loading of 1 and CuI/Cs2CO3/DMSO at 25° for the coupling reactions of alkyl iodides with terminal alkynes, the corresponding coupling products were obtained in moderate to excellent yields. This catalytic system is also suitable for alkyl bromides at 40°. It must be pointed out that with NaI as an additive complex 1 could effectively catalyze the C(sp3)-C(sp) coupling of nonactivated alkyl chlorides with alkynes under mild conditions (50°) with low catalyst loading (1 mol %). Complex 1 is easy to synthesize and has efficient catalytic activity, especially for alkyl chlorides, under mild conditions.

Organometallics published new progress about Alkynes, α- Role: RCT (Reactant), RACT (Reactant or Reagent). 622-86-6 belongs to class ethers-buliding-blocks, name is (2-Chloroethoxy)benzene, and the molecular formula is C8H9ClO, Safety of (2-Chloroethoxy)benzene.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Li, Bin published the artcileVolatile-char interactions during biomass pyrolysis Effect of char preparation temperature, Recommanded Product: 4-Hydroxy-3-tert-butylanisole, the main research area is volatile char interactions biomass cellulose pyrolysis.

In this study, the effect of char preparation temperature on the interactions between cellulose volatiles and acid-washed sawdust char was investigated exptl. on a fixed-bed pyrolysis system. The results indicated that significant volatile-char interactions did exist at the pyrolysis temperature of 500 °C as evidenced by the great changes in the composition and distribution of pyrolysis products. The oxygen-containing functional groups as well as the aromatic ring systems in the char both acted as active sites during the volatile-char interactions. The changes in chem. structure of biochar caused by the different preparation temperatures would notably affect the final products of cellulose pyrolysis. Meanwhile, the acid-washed sawdust char was still found to participate in the reaction process, lower temperature chars would have higher reactivities, and an obvious weight loss of char was also observed after interactions. In addition, volatile-char interactions significantly increased the yields of non-condensable gases, especially those of CO and CO2, while decreased the yield of condensable vapors. The introduction of biochar into cellulose pyrolysis could promote the ring scission of pyranoses as well as the decarbonylation/decarboxylation and dehydration reactions, thus caused the yields of anhydrosugars and monoarom. compounds decreased and the yields of light ketones and acids increased.

Energy (Oxford, United Kingdom) published new progress about Acids Role: IMF (Industrial Manufacture), PREP (Preparation). 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, Recommanded Product: 4-Hydroxy-3-tert-butylanisole.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhao, Qiang published the artcileRadical α-addition involved electrooxidative [3 + 2] annulation of phenols and electron-deficient alkenes, Application In Synthesis of 121-00-6, the main research area is phenol alkene electrooxidative regioselective diastereoselective cycloaddition; aryl dihydrobenzofuran preparation green chem.

An electrooxidative [3 + 2] annulation of phenols and electron-deficient alkenes for the synthesis of C3-functionalized 2-aryl-2,3-dihydrobenzofuran derivatives was achieved. The ring construction started by a unique α-addition of carbon radicals derived from anodic oxidation of phenols to electron-deficient alkenes. The subsequent anodic oxidation of the resulting alkyl radical intermediates followed by trapping with the phenolic hydroxy group assembles the 2,3-dihydrobenzofuran core. Such a pathway enabled the installation of various electrophilic functionalities including alkoxycarbonyl, alkylaminocarbonyl, trifluoromethyl, and cyano groups at the C-3 of the 2,3-dihydrobenzofuran framework, which is unattainable by other intermol. reactions. The application of this method for a rapid synthesis of a bioactive natural product was demonstrated.

Chemical Science published new progress about [3+2] Cycloaddition reaction, stereoselective (electrochem.). 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, Application In Synthesis of 121-00-6.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Uyanik, Muhammet published the artcileHypoiodite-catalysed oxidative homocoupling of arenols and tandem oxidation/cross-coupling of hydroquinones with arenes, SDS of cas: 121-00-6, the main research area is biarenol biquinone preparation; arenol oxidative homocoupling hypoiodite catalyst; aryl quinone preparation; hydroquinone arene tandem oxidation coupling hypoiodite catalyst.

The hypoiodite-catalyzed oxidative C-C homocoupling of arenols to biarenols or biquinones using aqueous hydrogen peroxide as an oxidant was reported. In addition, by combining hypoiodite catalysis and lipophilic Lewis acid-assisted Bronsted acid catalysis under aqueous conditions, a tandem oxidation/cross-coupling reaction of hydroquinones with electron-rich arenes was achieved. These results highlighted the substantial scope of hypoiodite/acid co-catalysis for use in oxidative coupling reactions.

Chemical Communications (Cambridge, United Kingdom) published new progress about Biaryls Role: SPN (Synthetic Preparation), PREP (Preparation). 121-00-6 belongs to class ethers-buliding-blocks, name is 4-Hydroxy-3-tert-butylanisole, and the molecular formula is C11H16O2, SDS of cas: 121-00-6.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem