Nickel acetate sodium hydride

Nickel acetate/sodium hydride tert-amy I alcohol -[Pg.34]

Sodium hydride—Nickel acetate-Sodium 1-amyl oxide (Nic), NaH Ni(OAc) C2II5C(CII3)2ONa. 

Ethyl sulfate Flammable liquids Fluorine Formamide Freon 113 Glycerol Oxidizing materials, water Ammonium nitrate, chromic acid, the halogens, hydrogen peroxide, nitric acid Isolate from everything only lead and nickel resist prolonged attack Iodine, pyridine, sulfur trioxide Aluminum, barium, lithium, samarium, NaK alloy, titanium Acetic anhydride, hypochlorites, chromium(VI) oxide, perchlorates, alkali peroxides, sodium hydride... 

Sodium Hydride-Sodium (-amyl oride-Nickel acetate... 

Sodium hydride-Sodium r-amyl oxide-Nickel acetate (NiCRA, 10, 365)... 

Cyclododecene may be prepared from 1,5,9-cyclododecatriene by the catalytic reduction with Raney nickel and hydrogen diluted with nitrogen, with nickel sulfide on alumina, with cobalt, iron, or nickel in the presence of thiophene, with palladium on charcoal, with palladimn chloride in the presence of water, with palladium on barium sulfate, with cobalt acetate in the presence of cobalt carbonyl, and with cobalt carbonyl and tri- -butyl phosphine. It may also be obtained from the triene by reduction with lithium and ethylamine, by disproportionation, - by epoxidation followed by isomerization to a ketone and WoliT-Kishner reduction, and from cyclododecanone by the reaction of its hydrazone with sodium hydride. ... 

Another highly active non-pyrophoric nickel catalyst is prepared by reduction of nickel acetate in tetrahydrofuran by sodium hydride at 45° in the presence of tert-amyl alcohol (which acts as an activator). Such catalysts, referred to as Nic catalysts, compare with P nickel boride and are suitable for hydrogenations at room temperature and atmospheric pressure, and for partial reduction of acetylenes to civ-alkenes [49]. 

Hydrogenation using Raney nickel is carried out under mild conditions and gives cis alkenes from internal alkynes in yields ranging from 50 to 100% [356, 357, 358, 359, 360]. Half hydrogenation of alkynes was also achieved over nickel prepared by reduction of nickel acetate with sodium borohydride (P-2 nickel, nickel boride) [349,361,362] or by reduction with sodium hydride [49], or by reduction of nickel bromide with potassium-graphite [363]. Other catalysts are palladium on charcoal [364], on barium sulfate [365, 366], on... 

Although these catalytic partial hydrogenations of alkynes may well be regarded as the procedure of choice for (Z)-alkenes,25 other catalytic systems have been explored. These include a sodium hydride-sodium alkoxide-nickel(n) acetate reagent,26 and a sodium borohydride-palladium chloride-polyethylene glycol system.27 Diisobutylaluminium hydride (DIBAL) has also been used for the conversion of alkynes into (Z)-alkenes.28 ( )-Alkenes are formed when the internal triple bond is reduced with sodium in liquid ammonia.29... 

Reduction of nickel acetate with sodium hydride gave a nickel black catalyst that was active for the selective hydrogenation of acetylenes and dienes to the monoolefins. It was also capable of promoting the hydrogenation of carbonyl... 

As with the palladium salts, nickel acetate could be reduced by sodium hydride in alcoholic media to give the catalyst termed Ni-c, which is comparable... 

Raney nickel. Ruthenium-Silica. Sodium hydride-Nickel acetate-r-Amyl oxide. 

Related Reagents. Calcium Hydride Iron(III) Chloride-Sodium Hydride Lithium Aluminum Hydride Potassium Hydride Potassium Hydride-5-Butyllithium-(V,(V,(V, (V -Tetra-methylethylenediamine Potassium Hydride-Hexamethylphos-phoric Triatnide Sodium Borohydride Sodium Hydride-copper(II) Acetate-Sodium t-Pentoxide Sodium Hydride-nickel(II) Acetate-Sodium t-Pentoxide Sodium Hydride-palladium(II) Acetate-Sodium t-Pentoxide Tris(cyclopenta-dienyl)lanthanum-Sodium Hydride Lithium Hydride Sodium Telluride. 

Acetylacetone Aiumina Caicium chioride Calcium hydride trans-1,2-Dichioroethyiene Lithium bromide Magnesium perborate Nickel acetate Perchloroethylene Soda lime Sodium suifate Zinc oxide drying agent mfg. 

Caubere and coworkers [43] developed another specific method, based on the unique stoichiometric nickel reagent. Reagent NiCRA (complex reducing agent) was prepared by reaction of sodium hydride (6 eq.) and tert-amyX alcohol (2 eq.) followed by addition of anhydrous nickel(II) acetate (1 eq.) and 2,2 -bipyridine (bpy, 2 eq. or other... 

A mixture of tert-amyl alcohol (2.2 ml, 1.77 g, 20 mmol) and anhydrous THF (10 ml) was added dropwise to a suspension of degreased sodium hydride (1.44 g, 60 mmol) and dried nickel(ll) acetate (1.77 g, 10 mmol) in refluxing THF (20 ml) containing 2,2 -bipyridine (5, 3.12 g, 20 mmol). The reaction mixture was refluxed for 2 h to obtain a solution of NiCRA-bpy reagent. Then, the solution of 4-chloroanisole (76,... 

The selective reduction of enones may be achieved by use of the correct catalyst. Thus reduction of enones by sodium hydride-sodium alkoxide mixtures with zinc(ii) chloride as catalyst gives 1,2- whereas nickel(ii) acetate gives 1,4-reduction. Similarly, use of cobalt(ii) or nickel(ii) chlorides yields only saturated ketones from the borohydride reduction of /3-alkyl- or /3-aryl-thio-enones. ... 

Lithium aluminum hydride Raney nickel Palladium black Sodium acetate Sodium amalgam Ammonia Aluminum... 

Reductions with nickel acetate I sodium hydride (MeCOO)2NHNaH... 

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