Reaction amine

Other noncychc reactions are observed, especially in polyamides of longer carbon chain monomers for example, the linear analogue to the cychc amine reaction is diamine coupling (eq. 10) to form secondary amines that can act as branch points (eq. 11). 

Method 6. Olefin amination reaction of an olefin with ammonia. 

Method 7. Alkyl haHde amination reaction of ammonia or alkylamine with an alkyl haHde. 

Alcohol amination reactions are described by a network of two general types of reaction. 

Water is a by-product of the amination reactions in both methods. The mixture of ammonia, water, unconverted alcohol, and amines are... 

The aromatic toluenediamines undergo typical amine reactions. The general chemistry is similar to that of the phenylenediamines or the... 

Aliphatic Alcohols and Thiols. Ahphatic alcohols on reaction with chloroformates give carbonates and hydrogen chloride. Frequendy, the reaction proceeds at room temperature without a catalyst or hydrogen chloride acceptor. However, faster reactions and better yields are obtained in the presence of alkaU metals or their hydroxides, or tertiary amines. Reactions of chloroformates with thiols yield monothiolocarbonates (14). 

Smooth acylaminations are also given by isocyanate adducts of 3-phenyloxaziridine. Ammonia and primary as well as secondary amines form the corresponding semicarbazides, e.g. (102). Owing to the fast amination reaction, shortlived substances like triazanes become accessible, e.g. the cyclohexyl compound (103), which is stable for only a few minutes at room temperature. 

If the bismaleimide-amine reaction is carried out with a deficiency of amine the polymer will have terminal double bonds which allows a cure site to give a thermosetting polymer via a double bond polymerisation mechanism. This approach was developed by Ciba-Geigy with their product P13N (Figure 18.42). 

The carbamoyl chloride formed may then be decomposed more or less simultaneously with the intial phosgene-amine reaction to produce diisocyanate. A urea may be formed as the result of side reactions. 

Chloropyridopyrimidines readily undergo amination reactions with... 

The.effect of the entropy of activation was noted above for the quaternary pyridine salts (280 and 281). In future work, it may also be found to reflect the electrostatic or hydrogen-bonding interactions in transition states of amination reactions and the effect of reversible cationization of an azine-nitrogen. Brower et observed a substantial rate difference between piperidino-dechlorinations of 2-chloropyrimidine in petroleum ether and in alcohol due partly to the higher entropy of activation in the latter solvent (Table III, lines 3 and 4). 

Table XIV, line 3). The rates are equal (only at 20°) due to a large, compensating difference between the entropies of activation. In piperidino-dechlorination, 4-chloroquinoline (Table XI, line 3) has a higher and a lower rate (by about 200-fold at 20°) than 1-chloroisoquinoline (Table XIV, line 1). This reversal of reactivity and of the relationship of the activation energies is attributed to the factors in amination reactions mentioned above. The relative reactivity of the chloro groups in 2,4-dichloroquinoline with methanolic methoxide is given as a 2 1 rate ratio of 4- to 2-displacement. 

Scheme 1 The proposed acid/amine and anhydride/ amine reaction between carboxylic groups/anhydride groups on modified polyolefins and amine end groups on Nylon-6.

An aldehyde or ketone reacts with a primary amine, RNH.2, to yield an imine, in which the carbonyl oxygen atom has been replaced by the =N-R group of the amine. Reaction of the same aldehyde or ketone with a secondary amine, R2NH, yields an enamine, in which the oxygen atom has been replaced by the -NR2 group of the amine and the double bond has moved to a position between the former carbonyl carbon and the neighboring carbon. 

Ammonia, primary amines, and secondary amines can all be used in the reductive amination reaction, yielding primary, secondary, and tertiary amines, respectively. 

The starting material for the synthesis of this chelating resin is chloromethylated styrene-divinylbenzene, which undergoes an amination reaction and is then treated with monochloracetic acid ... 

Parallel reactions. In water 2.4-ditrophenyl acetate (= ester) undergoes parallel hydrolysis and amination reactions (am = triethylenediamine = R NH ) according to the scheme shown. The rate constants are hyd = 2.10 X HP5 s 1 and k.m = 1.61 x... 

Fig. 12.—Carbonyl-amine reactions leading to Maillard reaction products and reductones (adapted from Ref. 51a).

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