With amines and hydrogen

Diamine. 2,2-Dimethyl-l,3-propanediamine [7328-91-8] (5) has been prepared by amination of neopentyl glycol by treating the glycol with ammonia and hydrogen at 150—250°C at 10—31 MPa (1500—4500 psig) over a Ni catalyst. The diamine is useflil for preparation of crystalline polyureas by reaction with diisocyanates (36). 

The primary reactions of amines and hydrogen sulfide and carbon dioxide are those of a base with acids ... 

Dibenzjiamine, [103-49-17, CgH CH2NHCH2CgH (bp, 300°C at 101.3 kPa) is produced by reaction of benzyl amine with benzaldehyde and hydrogenation of the Schiffs base. It is used in mbber and tire compounding, as a corrosion inhibitor, and as an intermediate in the production of mbber compounds and pharmaceutical products. 

Notable examples of general synthetic procedures in Volume 47 include the synthesis of aromatic aldehydes (from dichloro-methyl methyl ether), aliphatic aldehydes (from alkyl halides and trimethylamine oxide and by oxidation of alcohols using dimethyl sulfoxide, dicyclohexylcarbodiimide, and pyridinum trifluoro-acetate the latter method is particularly useful since the conditions are so mild), carbethoxycycloalkanones (from sodium hydride, diethyl carbonate, and the cycloalkanone), m-dialkylbenzenes (from the />-isomer by isomerization with hydrogen fluoride and boron trifluoride), and the deamination of amines (by conversion to the nitrosoamide and thermolysis to the ester). Other general methods are represented by the synthesis of 1 J-difluoroolefins (from sodium chlorodifluoroacetate, triphenyl phosphine, and an aldehyde or ketone), the nitration of aromatic rings (with ni-tronium tetrafluoroborate), the reductive methylation of aromatic nitro compounds (with formaldehyde and hydrogen), the synthesis of dialkyl ketones (from carboxylic acids and iron powder), and the preparation of 1-substituted cyclopropanols (from the condensation of a 1,3-dichloro-2-propanol derivative and ethyl-... 

Self-association of substances with acidic hydrogens82, including amines (to form, in a first approximate model, dimers mainly by hydrogen bonding interactions), is a long known problem. There are numerous reports in the literature on the thermodynamic, spectroscopic and structural aspects of self-association and dimer formation of water, alcohols, ammonia, amines and hydrogen sulphide83. 

Among the factors to affect the EDA of MRNi in the reaction system are trace amounts of organic acids, amines, and hydrogen acceptor compounds 23-25, 28). Among all, the positive effect of acids was one of the most important findings for the effective performance of enantio-differ-entiating hydrogenations with MRNi. 

It has been reported that amines (32JCSH42) or imines (53JCS143), when reacted with formaldehyde and hydrogen sulfide, give rise to N-substituted 1,3-thiazetidines. However, in at least one case the structure was established to be an eight-membered ring dimer, which calls into question the structure of these compounds. 

Aminomethylene derivatives may be prepared by reacting the pyrido [1,2-a]pyrimidines (63 R = H) with aminomethanols in ethereal hydrogen chloride solution or with amines and paraformaldehyde.295... 

This testing revealed that either instantaneous explns or igns occur with unsym-diethylene-triamine, UDMH in JP-4 propint, pure UDMH, and pure JP-4. The results of hypergolic ign studies are also reported. It was found in tests conducted using a small-scale rocket motor that immediate hypergolic ign occurred with fuels such as ethanol, JP-4, unsym-diethylenetri-amine and hydrogen] 2) J.C. Bailer et al,... 

Isothiocyanates. These compounds, also known as mustard oils are oils or low melting point solids, and usually possess irritating odours. Upon boiling with adds, for example with concentrated hydrochloric add, they are hydrolysed to the primary amines and hydrogen sulphide is evolved ... 

---