Hydrogen hydrazine hydrate

Mercury(II) oxide Chlorine, hydrazine hydrate, hydrogen peroxide, hypophosphorous acid, magnesium, phosphorus, sulfur, butadiene, hydrocarbons, methanethiol... 

Tin(ll) chloride Boron trifluoride, ethylene oxide, hydrazine hydrate, nitrates, Na, K, hydrogen peroxide... 

Toluenesulfonylhydrazide has been prepared by shaking 50% hydrazine hydrate and / -toluenesulfonyl chloride in benzene for several hours. Ammonia has been used as an agent for removing the hydrogen chloride evolved. ... 

Triazole has been prepared by the oxidation of substituted 1,2,4-triazoles, by the treatment of urazole with phosphorus pentasulfide, by heating equimolar quantities of formyl-hydrazine and formamide, by removal of the amino function of 4-amino-l,2,4-triazole, by oxidation of l,2,4-triazole-3(5)-thiol with hydrogen peroxide, by decarboxylation of 1,2,4-triazole-3(5)-carboxylic acid, by heating hydrazine salts with form-amide,by rapidly distilling hydrazine hydrate mixed with two molar equivalents of formamide, i by heating N,N -diformyl-hydrazine with excess ammonia in an autoclave at 200° for 24 hours, and by the reaction of 1,3,5-triazine and hydrazine monohydrochloride. ... 

Ethylene imine Hydrazine hydrate Hydrogen sulfide. Hydroxylamme salts Inorganic Hg. compounds lodates Iodides... 

Cyanamidopyrimidine (15) was converted to the thioureido derivative 16 by reaction with hydrogen sulfide and ammonium hydroxide and then cyclrzed to 18 with hydrazine hydrate. Cyclization to 18 presumably took place by elimination of a molecule of ammonia from the aminoguanidine intermediate 17 (65JCS3357) (Scheme 11). 

The catalytic activity of PCSs results from their semiconductor properties. The first studies in this field date from 1959—1961. Thus, we have demonstrated catalytic activity of products of the thermal transformation of PAN in the decomposition reactions of hydrogen peroxide, hydrazine hydrate, and formic acid270, 271. There is an indication of catalytic activity of poly(aminoquinone) in the reactions of the hydrogen peroxide decomposition272. ... 

Anhydrous hydrazine and sodium react in ether to form sodium hydrazide, which explodes in contact with air. Hydrazine hydrate and sodium react very exother-mally, generating hydrogen and ammonia. 

Pyrazoles were synthesized in the authors laboratory by Le Blanc et al. from the epoxy-ketone as already stated in Sect. 3.1.1a, Scheme 35 [80]. The synthetic strategy employed by Le Blanc et al. [80] was based upon that the strategy published by Bhat et al. [81] who also described the synthesis of pyrazoles but did not report cytotoxic evaluation on the synthesized compounds. Scheme 48 shows the synthesis of the most active compound (178). Dissolution of the epoxide (179) with a xylenes followed by treatment with p-toluenesulfonic acid and hydrazine hydrate produced the pure nitro-pyrazole 180 in good yield (60%). Catalytic hydrogenation with palladium on activated carbon allowed the amino-pyrazole (178) to be obtained in a pure form. This synthesis allowed relatively large numbers of compounds to be produced as the crude product was sufficiently pure. Yield, reaction time, and purification compared to reported approaches were improved [50, 61, and 81]. Cytotoxicity of these pyrazole analogs was disappointing. The planarity of these compounds may account for this, as CA-4, 7 is a twisted molecule. 

Hydrogen donors that function poorly with homogenous catalysts include hydrazine hydrate, alkenes (e.g., cyclohexene), and ascorbic acid. This is somewhat surprising as they can be very effective in heterogeneous transfer hydrogenation. 

Finally, the amino metabolites of the NMs have been synthesized by researchers and used as standards. These synthesis methods include reduction of NMs with hydrogen in the presence of Pd/charcoal to form the amino metabolites [ 15,16,23] or reaction of NMs with hydrazine hydrate and Raney nickel [ 14,23]. A metabolite of HHCB, HHCB-lactone, has also been synthesized and used as a standard [17]. 

Scheme 7 shows formation of a new fused ring described by Mohan and Kataria <1998IJB819>. These authors reported that treatment of the benzylidene compound 19 with hydrazine hydrate in acetic acid in the presence of sodium acetate gave the tricyclic fused pyrazoline derivative 20 in acceptable yield (61%). The two hydrogen atoms at the site of the ring closure were found to be as. 

For the replacement of oxygen by hydrogen in ketones and aldehydes the method of Kishner and Wolff is used as often as is that of Clemmensen. In the former method the hydrazone or semicarbazone of the carbonyl compound is heated for several hours—preferably in the presence of hydrazine hydrate—in a sealed tube or autoclave with sodium ethoxide at about 160°. The explanation of the reaction is that, under the catalytic influence of the ethoxide, the hydrazone is transformed into a diimine which then decomposes in the same way as does phenyldiimine (p. 286) ... 

Uses Manufacture of acrylonitrile, hydrazine hydrate, hydrogen cyanide, nitric acid, sodium carbonate, urethane, explosives, synthetic fibers, fertilizers refrigerant condensation catalyst dyeing neutralizing agent synthetic fibers latex preservative fuel cells, rocket fuel nitrocellulose nitroparaffins ethylenediamine, melamine sulfite cooking liquors developing diazo films yeast nutrient. 

Lauwiner, M. Rys, P. Wissmann, J. (1998) Reduction of aromatic nitro compounds with hydrogene hydrate in the presence of an iron oxide hydroxide catalyst. I. The reduction of monosubstituted nitrobenyenes with hydrazine hydrate in the presence of ferrihydrite. 

Hydrazine hydrate is used as a reducing agent in synthetic and analytical reactions and as a solvent for many inorganic compounds. It also is used with methanol as a propellant for rocket engines. Another apphcation is catalytic decomposition of hydrogen peroxide. 

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