Hydrazines and hydrazones

2- diaryl-l-picrylhydrazines to the corresponding hydrazyls can be achieved with potassium permanganate.396 

Dilithium salts of carboxylic acids add to glyoxal mono(dimethylhydrazone) to give salts which with -toluenesulphonyl chloride afford the corresponding unsaturated 

In the preparation of phenylhydrazone derivatives401 of some a-ketoesters, the (E)-isomer was found to predominate, but could be partially isomerized into the (Z)-isomer by keeping as a solution in 

The lithiation of hydrazones derived from (R)- or (S)-l-amino-2-methoxymethylpyrrolidine, followed by Michael addition, is the basis of a diastereoselective and enantioselective synthesis of 5-oxo-esters.4 Lithiated heterocyclic hydrazones can 

5-Hydrazino-A -isoxazolines have been prepared either from the corresponding 5-hydroxy-compounds and either IJ, -dialkyl- or acyl-hydrazines upon refluxing in benzene with a cation exchange 

Hydrazones have also been obtained by the action of 

These phthalimides also reacted with sodium methoxide to afford N.-alkylidenephthalic acid monohydrazides. Treatment of (trimethyl-silyl-arylvinylhydrazines with bromines afforded enediazenium salts which reacted with nucleophiles (amines, alcohols, thiols, 

Reaction of 1,3,4-oxadiazoles with concentrated hydrochloric acid in tetrahydrofuran followed by condensation with aldehydes 

Hydroxylamines have been obtained from reductions of nitroalkenes with borane-tetrahydrofuran, and it has also been shown that catalytic quantities of sodium borohydride greatly accelerate the rates 454 

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Of the further functional derivatives of cyclopropenones in the diphenyl series, the oxime115,121) and several hydrazones115) (e.g. 158/159), and a2ines (e.g. 760U5)), are easily available from the ethoxy cation 75 and hydroxylamine, hydrazines, and hydrazones, respectively. Sometimes oximation of cyclopropenones produces unexpected results (see later and Ref.42 ). 

The production of hydrazine and hydrazones by reduction of nitrosamines is another route for NOC production. Piperazine also leads to production of NOC and its use as an antihelminthic has decreased considerably in most developed countries, though not in the case of developing countries due to its low cost. 

Simpler insertion reactions have been demonstrated in the case of coordinated hydrazines and hydrazones, where the terminal amino group is still nucleophilic (equation 58).J99 200... 

A. A. Potekhin. The Chemistry of the Functionally Substituted Hydrazines and Hydrazones. The Influence of Structural Factors on Ring-Chain Equilibria (in Russian). Thesis Doct. Chem. Sci. Diss., Leningrad State University, 1989. 

Preparative studies have been reported on the phosphorylation of a series of hydrazines and hydrazones and on the phosphorylation of vicinal diamines with diphenyl phosphorochloridate. The cyclic phosphoramidate esters (12) and (13) may be obtained by treatment of the appropriate acyclic... 

Most of the recent preparations of the tetrazine ring have been based on cyclocondensations of nitrile imines with hydrazines and hydrazones. These synthetic studies have been reviewed recently by Farwanah and Awadallah <2005MOL492>. 

Other general references in this section are presented as titles, as follows The behavior of 3-ferrocenyl-1-methyl-1,2-pentamethyleneallyl and 1,5-diferrocenyl-3-methyl-2,4-tetramethylene-l,4-dienyl carbocations in the cationic dimerisa-tion of 1,3-dienes Linear and nonlinear optical properties of diiron p-vinylcar-byne acceptor and stilbenyl donor based chromophores Organometallic iron(II) hydrazines and hydrazones - syntheses, characterisations and the X-ray crystal structures of [Fe(ri -Cp)(r -C6H5NHNH2)] PF6 and [Fe(ri -Cp)(ri -p-MeQH4NHN = CMez)] +PF6-. ... 

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