Dicyclohexyl amine

Similarly, tryptophol 27 was obtained in 60-70% yield with other amines. Each by-product related to the corresponding amine was also observed (Scheme 4.20). For example, using triethylamine as base forms indole impurity 75 while using dicyclohexyl amine leads to the formation of bicyclic indole impurity 76. 

The synthesis of new thieno-annelated 6aA4-thia-l,6-diazapentalenes 33 from iro-thiazolium-5-methyl and 5-methylene groups with dicyclohexyl amines in methanol or dimethyl sulfoxide has been achieved (Scheme 82) <1996MOL142>. 

Fig. 14.8. Chromatogram and mass spectrum showing typical GC/MS data. The mass spectrum shown was obtained from the peak indicated with the arrow. Peak identification ldecane, 2 = 1-octanol, 3 = 2,6-dimethylphenol, 4 = 2-ethylhexanoic acid, 5 = 2,3-dimethylaniline, 6 = dodecane, 7 = decanoic acid, methyl ester, 8 = dicyclohexyl amine, 9 = undecanoic acid, methyl ester, 10-dodecanoic acid, methyl ester.

The hydrocarbonyl is readily trapped by a base such as dicyclohexyl-amine. Since the acylcobalt tetracarbonyl can be generated by the... 

Aus Dicyclohexyl-amin entsteht so 1-Aminocarbonyl-l-cyclohexylamino-cyclohexan (60%). Bei ungleichen Amin-Resten konnen regioisomere Verbindungen entstehen. Die Methode eroft net auch einen Zugang zu Prolin-Derivaten2. 

A variation of the nitrosation with acetic acid/sodium nitrite is illustrated in the preparation of A-nitrosodicyclohexylamine. In this case, dicyclohexyl-amine was converted into its acetate salt (m.p. 115°-116°C) and the salt was warmed with an aqueous solution of acetic acid and sodium nitrite. The insoluble precipitate was filtered and recrystallized from acetone, yielding the nitrosoamine in the form of colorless crystals, m.p. 104°-105°C [14]. 

Corrosion inhibitors filming amines and their impurities (dicyclohexyl-amine, N-nitroso compounds). 

Cleavage of l,T-peroxy dicyclohexyl amine then yields caprolactam with regeneration of one equivalent of eyelohexanone according to the reaction [125,126] ... 

As a recent example, HR of the disubstituted alkenes 44 gave 45 with high stereoselectivity using a ligandless catalyst. In this case, selection of bases is crucial and combined use of methyl(dicyclohexyl)amine and a phase transfer catalyst gave the best results [26]. 

Dimethyl-, Diethyl-, Diisopropyl-, Dibutyl-, Dicyclohexyl-amine, Poly-S-isobutyl-ethylenimine. 

Figure 6 Typical results of the standardized Grob test, for determination of column quality. Mixture contents (and mass in the split method-injected solution, in mg ml ) are (1) 2,3-butanediol (0.95) (2) />decane (0.43) (3) 1-octanol (0.555) (4) nonanal (0.625) (5) 2,6-dimethylphenol (0.485) (6) 2-ethylhexanoic acid (0.605) (7) 2,6-dimethylaniline (0.513) (8) n-dodecane (0.44) (9) methyl decanoate (0.605) (10) dicyclohexyl amine (0.51) (11) methyl undecanoate (0.59) and (12) methyl dodecanoate (0.578). The dotted line represents the expected peak maxima when each solute exhibits complete recovery, and excellent chromatographic behavior. (From Jennings W (1987) Analytical Gas Chromatography, p. 234. Orlando Academic Press.)...

Amines, prim., Alkylamines Methyl-, Ethyl-, Propyl-, Butyl-, Benzyl-amine Hexamethylenediamine Dimethyl-, Diethyl-, Diisopropyl-, DibutyU, Dicyclohexyl-amine, Morpholine Amines, tert. Trialkyl-amines... 

Dicyclohexyl amine is synthesized from the reaction of aniline and hydrogen with the proper stoichiometry as shown in Figure 10.22. 

Figure 10.22 Dicyclohexyl amine is produced from a reaction of aniline and hydrogen...

VD) With organotin chloride and dicyclohexyl amine as hydrogen... 

Lidene + Mn(CH3COO)2 + Co4(CO) 2 + LiBr Dicyclohexyl-amine 0.1 200 Indylmanganese tricarbonyl [115]... 

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