Amides zinc oxide

A number of basic materials such as hydroxides, hydrides and amides of alkaline and alkaline earth metals and metal oxides such as zinc oxide and antimony oxide are useful catalysts for the reaction. Acid ester-exchange catalysts such as boric acid, p-toluene sulphonic acid and zinc chloride are less... 

Bahrami K, Khodaei MM, Farrokhi A (2009) Highly efficient solvent-free synthesis of dihydropyrimidinones catalyzed by zinc oxide. Synth Commun 39 1801-1808 74. Gross GA, Wurziger H, Schober A (2006) Solid-phase synthesis of 4,6-diaryl-3,4-dihydro-pyrimidine-2(lH)-one-5-carboxylic acid amide derivatives a Biginelli three-component-condensation protocol based on immobilized beta-ketoamides. J Comb Chem 8 153-155 Desai B, Dallinger D, Kappe CO (2006) Microwave-assisted solution phase synthesis of dihydropyrimidine C5 amides and esters. Tetrahedron 62 4651 664 Kumar A, Maurya RA (2007) An efficient bakers yeast catalyzed synthesis of 3,4-dihydro-pyrimidin-2-(lH)-ones. Tetrahedron Lett 48 4569-4571 77. Zalavadiya P, Tala S, Akbari J, Joshi H (2009) Multi-component synthesis of dihydropyrimidines by iodine catalyst at ambient temperature and in-vitro anti mycobacterial activity. Arch Pharm 342 469-475... 

Under solvent-free conditions, one-step Beckmann rearrangement of a variety of ketones and aldehydes proceeded in the presence of alumina sulfuric acid 285 (equation 93). Good selectivities were also obtained in the rearrangement of aldoximes to primary amides using zinc oxide as catalyst " (equation 93). 

PHENYLTRIDECANE (123-02-4) CjsHji Combustible liquid (flash point 230°F/110°C). Violent reaction with bases, amines, amides, and inorganic hydroxides and with diazo compounds. Incompatible with nitric acid, strong oxidizers. On small fire use water spray, dry chemical powder (such as Purple-K-Powder), alcohol resistant foam, or CO2 extinguishers. PHILOSOPHERS WOOL (1314-13 -2) see zinc oxide. 

ZINC BUTTER or ZINC CHLORIDE or ZINC (CHLORURE de) (French) (7646-85-7) ZnCl2 Noncombustible solid. Reacts with water, forming a medium-strong acidic solution (pH about 4) zinc oxychloride may be formed with large amounts of water. Violent reaction with strong bases, amines, amides, and inorganic hydroxides potassium. Attacks metals as fume or in the presence of moisture. Thermal decomposition forms toxic zinc oxides and hydrogen chloride fumes. 

Nitriles are made by heating fatty acids with ammonia at 280-360 °C in the presence of a catalyst such as zinc oxide or manganese acetate, probably via the amide. They are used almost entirely to furnish amines by hydrogenation in the presence of... 

The solvent-free one step Beckmann rearrangement of ketones 1 and aldehydes in the presence of zinc oxide afforded the corresponding amides 3 (R = alkyl, aryl, cycloalkyl = H, cycloalky 1). Symmetrical ketones furnished the amides in good to excellent yields. In the case of unsymmetrical ketones the reaction was selective and one of the two possible amides was formed. Aromatic and aliphatic aldehydes were converted to the corresponding primary amides. 

A vulcanizing system for NBRs had the following composition, phr stearic acid, 2.0 Sulfenamide Ts (7V-cyclohexylbenzothiazole-2-sulfen-amide), 1.5 zinc oxide, 5.0 and sulfur, 0.75. EPDM of the Royalen brand, the DSM and domestic EPDM was vulcanized with supported Peroximon F-40 taken in an amount of 5.5 phr. Each rubber was mixed with its vulcanizing system by roll milling at 40-60 °C for 15 min. Then, a rubber blend was prepared under the same conditions. The blends were vulcanized at 170 °C within 15 min. 

Additives used in final products Fillers aluminum hydroxide, calcium carbonate, clay, carbon nanotubes, magnesium hydroxide, montmorillonite, red phosphorus, quartz, silica, wood fiber, zinc oxide, zinc powder Plasticizers EVAC is used as plasticizer in PVC and PLA therefore it seldom requires plasticization Antistatics 2-methyl-3-propyl benzothiazolium iodide, alkylether triethyl ammonium sulfate, organic amide Antiblocking tty amide, laponite, silica Release methylstyryl silicone oil Slip eru-camide, oleamide, stearamide Thermal stabilizer BHT ... 

In the same time period of Price s work, Hill, Bailey and Fitzpatrick of Union Carbide Corporation developed some improved catalysts for polymerizing ethylene oxide to high polymer(l ). These new catalysts included improvements on the very early systems of Staudinger, i.e., strontium, calciiom, and zinc oxides and carbonates, as well as some new, even better, systems based on calcium alkoxides(ii) and amides(j . Bailey used the latter systems in 1958 to make water-soluble ethylene oxide-unsaturated epoxide copolymers(17). Vulcanizates of these copolymers were very water sensitive and thus not very useful in the conventional elastomer area. 

The new silazane 5 may be reacted with activated metals, organometallic compounds or simple metal amides, or may first be transformed to its lithium salt and then reacted with metal(II) chlorides [11]. In all these cases, metal derivatives of 5 are obtained with the general formula j [Mc (/BuO)Si 9N(9M, which have no further base coordinated to the metal. So far we have synthesized amides with M = Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Ba, all elements in oxidation state +2. X-ray structure determinations have been performed on the calcium, manganese, iron, zinc, and barium derivatives. 

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