Tris amines amines

Amino-ethanol. Di(2-hydroxyethyl)amine. Tri(2-hydro3cyethyl)amine. Monohydrate. Hexa-deriv. 

Pyrimidine-2,4,5-triamine, 6-hydroxy-as cofactor of phenylalanine hydroxylase, 1, 261 Pyrimidine-2,4,5-tri amines basic p/fa, 3, 61 Pyrimidine-2,4,6-triamines synthesis, 3, 115... 

Aromatic amines, Sulfuric acid Nielsen, A. T. etal., J. Org. Chem., 1980, 45, 2341-2347 The acid, prepared from 90-98% hydrogen peroxide and oleum or 100% sulfuric acid, is one of the most powerful known oxidants and its use for oxidising aromatic amines to nitro compounds has been studied. Some mono- di- and tri-amines are destroyed exothermically with violent fume-off. Precautions for use are detailed. 

Di(5-nonyl)-2,2 -bipyridine A-propyl(2-pyridyl)methanimine 2,2 6, 2" -Terpyridine 4,4, 4"-Tris(5-nonyl)-2,2 6, 2"-terpyridine N, N, N, N", /V -Pentamethy ldie(hyelenetriamine 1,1,4,7,10,10-Hexamethyltriethylenetetramine Tris[2-(dimethylaminoethyl]amine Tris[(2-pyridyl)methyl]amine... 

Compared with primary and secondary amines, tertiary amines are virtually unreac-tive towards carbenes and it has been demonstrated that they behave as phase-transfer catalysts for the generation of dichlorocarbene from chloroform. For example, tri-n-butylamine and its hydrochloride salt have the same catalytic effect as tetra-n-butylammonium chloride in the generation of dichlorocarbene and its subsequent insertion into the C=C bond of cyclohexene [20]. However, tertiary amines are generally insufficiently basic to deprotonate chloroform and the presence of sodium hydroxide is normally required. The initial reaction of the tertiary amine with chloroform, therefore, appears to be the formation of the A -ylid. This species does not partition between the two phases and cannot be responsible for the insertion reaction of the carbene in the C=C bond. Instead, it has been proposed that it acts as a lipophilic base for the deprotonation of chloroform (Scheme 7.26) to form a dichloromethylammonium ion-pair, which transfers into the organic phase where it decomposes to produce the carbene [21]. 

The synthetic and industrial importance of this reaction lies in its generality, and the ease with which the amino substituent in the products can be subsequently transformed into other functionalities. Pyridine itself is more difficult to aminate than quinoline or isoquinoline, and it does not react with potassium amide in liquid ammonia even on prolonged treatment. However, pyridine is aminated in good yield by sodamide in toluene, and di- and tri-amination can be achieved with excess sodamide at higher temperatures. The 4-position is substituted last in triamination y-amination is very difficult indeed and only takes place when all a -positions are occupied. 

Synonyms Alkanolamine 244 nitrilotriethanol TEA TEA (amino alcohol) TEOA triethanolamin tris([3-hydroxyethyl)amine tris(2-hydroxyethyl)amine... 

The [Cr(en)3]2+ and [Cr(pn)3]2+ salts have reflectance spectra (Table 11) resembling those of the hexaammines, and the six N donor atoms are assumed to complete tetragonally distorted octahedra around the metal. Stability constant measurements (Table 39) have shown that the ions [Cr(en)(aq)]2+ (vmax= 18 300 cm-1, e = 25 dm3 mol-1 cm-1) and [Cr(en)2(aq)]2+ (vma = 17 500 cm-1, e = 17 dm3 mol-1 cm-1) exist in aqueous solution, but that, as in the copper(II) system, the third ethylenediamine molecule is only weakly bound, and care is needed to prevent loss of en from tris(amine) complexes in the preparations. Several bis(amine) complexes, e.g. [CrBr2(en)2], have been isolated, and these are assigned trans structures because of IR spectral resemblances to the corresponding oopper(II) complexes. Since the spectrum of [Cr(S04)(en)2] also shows the presence of bidentate sulfate, this is assigned a trans octahedral structure with bridging anions. 

Chromium(II) complexes of bipyridyls, terpyridyl and the phenanthrolines have been discussed in Section 35.2.2.1. Complexes of the ligands 2-aminomethylpyridine (pic, 2-picolyl-amine) and 8-aminoquinoline (amq), which have one heterocyclic and one amino nitrogen donor atom, have been prepared by methods similar to those in Scheme 10. The bis(amine) complexes are typical high-spin, distorted octahedral complexes, and the mono(amine) complexes, from their antiferromagnetic behaviour and reflectance spectra, are six-coordinate, halide-bridged polymers (Table 15).103 No tris(amine) complexes could be prepared so the attempt to find spin isomeric systems in octahedral chromium(II) systems was unsuccessful ([Cr(en)3]X2 are high-spin and [Cr(bipy)3]X3 and [CrX2(bipy)2] low-spin). 

Amine Tris-[2.2-dinitro-2-Huoro-ctliyl]- E10b2. 53 (Educt)... 

Amine Tris-[2-(1,1,2-trifluoro-eth-oxy)-elhyl]- ElOa, 49 (Toxicity)... 

Amine Tris-[nonafluoro-butyl]-ElOa. 19 (bp), 21 (hpophilicily). 49 (Toxicity), 72 (Application)... 

The activity of homogeneous catalysts also has been demonstrated Wilkm son s catalyst tris(triphenylphosphine) rhodium chloride induces petfluoroalkyl iodides to add to olefins at 80 °C [10] (equation 10) Tetrakis(tnphenylphosphme)-palladtum promotes the addition to both alkenes and alkynes in hexane [11] Amines and amine salts induce addition at 120-140 °C [12] (equation 11)... 

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