Reaction with ethylenediamine

Stability of the bidentate and multidentate complexes in aqueous solution [16] compared with monodentate complexes. Kinetic studies of gold(III) reactions with ethylenediamine and related ligands show that the initial displacement of one end of the chelate is most often followed by rapid reclosure of the ring, rather than displacement of the second bond to the metal ion [15]. 

The synthesis and biological testing of the pyrazine compound 123 was described by Wang et al. [34], The same benzoin intermediate 22 was formed as described in Scheme 2. A three-step reaction was then performed to obtain the desired pyrazine 123, shown in Scheme 31 (i) oxidation of Q1SO4 in aqueous pyridine, (ii) reaction with ethylenediamine in EtOH, and (iii) aromatization in the presence of elemental sulfur. 

Reaction with ethylenediamine (en) in aqueous potassium chloride solution forms Cu(ll)-ethylenediamine complex, while Cu ion is reduced to its metallic state ... 

Glover E.G. Kayser, Quantitative Spectro-photometric Analysis of Polynitroaromatic Compounds by Reaction with Ethylenediamine , NOLTR-67-175 (1977) 68) S.S. Al-Kazraji... 

If tri8(ethylenediamine)chromium(III) chloride is prepared by the method of Rollinson and Bailar,7 it is worthy of note that if the dehydration of the hydrated chromium (III) sulfate is performed in a vacuum oven (2-3 mm. Hg, 70-80°C.) the anhydrous sulfate is obtained in a much more reactive form so that the reaction with ethylenediamine, when started by local heating, proceeds by itself and is finished within an hour. Editor s note For an alternative preparation, see Inorganic Syntheses, 10, 33 (1967) also ref. 26. 

The first step in this minimalistic transcription/translation process that mimic genealogical criteria in Fig. 46 involves Michael addition of methyl acrylate to the nucleophilic ammonia surface to produce an electrophilic, carbomethoxy functionalized surface, followed by reaction with ethylenediamine to translate the functionalized dendrimer surface back to a nucleophilic primary amine functionalized surface. This iterative sequence is the key in providing alternating nucleophilic... 

Acetophenone, A/-methyloxazolidine derivative, lithiation, 56, 261 Acetyl hypofluorite fluorination of uracil by, 59, 3 fluorination using, 60, 7 reaction with pyridines, 58, 280, 289 Acetylacetone, hexafluoro-, reaction with ethylenediamine, 56, 3 Acetylene cyclic dimer, trimer. tetramer, dissociation energies, 56, 343 Acetylenes, activated reactions with 3-diazo-azoles, 59, 70... 

Benzoxazole, 2-trimethylsilyl-, -trimethylstannyl-, 56, 221 Benzoyl isocyanide, possible intermediate in fragmentation, 56, 80 Benzoylacetone, reaction with ethylenediamine, 56, 4 Benzoylation of uracils, photochemical, using diphenyl-l,3,4-oxadiazole, 55,... 

Buta-l,3-diyne, reaction with ethylenediamine, 56, 9 Butane-2,3-dione, perlluoro-, heterocycles from, 59, 17... 

Butane-1,3-dione, 1-phenyl-, reaction with ethylenediamine, 56, 4 But-2-ene, perlluoro-, cyclocondensations with 1,2-dinucIeophiles, 60, 17 But-2-en-l-ol, cycloaddition to nitrile... 

Reaction of the hemialdal (11), or its hydrate, with amino and hydrazino compounds in water or methanol has been studied. Aromatic amines and benzylamine gave derivatives (16) of the hemialdal piperidine also gave a hemialdal derivative. Reaction with ethylenediamine gave the tricyclic compound (17). ... 

While nonfluorinated 1,3-diketones on Cu+2 and Ni+2 matrices form N,N -ethylenebis-(aminovinylketone) chelates in their reactions with ethylenediamine, fluorinated 1,3-diketones give 2,3-dihydro-1 //-l, 4-diazepines 39 via the intermediate formation of metal chelates. 

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