Trialkylamines special

Numerous cationic azo dyes are prepared by the action of /V-hydroxymcthyl-chloroacetamide on azo dyes in sulfuric acid medium, followed by displacement of the reactive chloro substituent by pyridine or trialkylamine. Of special significance for dyeing paper are dyes that are prepared by coupling of diazotized 2-(4 -aminophenyl)-5-methylbenzothiazole to acetoacetaiylides, pyrazolones, naphthols [143], or barbituric acid derivatives [144], followed by reaction with N-hydroxymethylchloro-acetamide and pyridine. The azo dye obtained by oxidative dimerization of 2-(4 -aminophenyl)-5-methylbenzothiazole may also be subjected to this conversion [145], Dye 51 colors paper yellow. 

Many papers and patents deal with incorporation of additives in the poly-(urethane-seq-butadiene)s to increase the condensation efficiency, to improve the processing, or to improve the properties of solid propellants. A processing aid, trialkylamine 2201 and also tetracycline 221), was shown to reduce the viscosity and increase the pot life of hydroxytelechelic polybutadiene/polyisocyanate systems. It has been shown that the cure of isophorone diisocyanate and hydroxytelechelic polybutadienes was not affected by the addition of the ammonium perchlorate propellant 222). Special modification of HTPBs have been referred to in Refs. 223 236>. 

Whereas the preparation of aliphatic aluminum compounds from appropriate element alkyls and aluminum halides is now of interest only in special cases (see Sections II,A,3 and IV,B), the route to aryl aluminum compounds from aryl magnesium halides and aluminum halides or from either aluminum or trialkylamine alanes and mercury diaryls is still useful (174, 48). 

Quaternary onium salts. Quaternary ammonium salts include trioctymethylammo-nium chloride (Starks catalyst), Aliquat 336, tricaprylmethylammonium chloride, tetrabutylammo-nium hydrogen sulfate (Brandstrom s catalyst), and benzyltrimethylam-monium chloride (Mqkosza s catalyst) quaternary ammonium salts can also be generated in situ from trialkylamines, etc. Other quaternary onium salts include tetrabutylphospho-nium bromide, tetraphenylphosphonium bromide, triphenylbenzylphosphonium chloride, tetraphenylarsonium chloride, and triphenylsulfonium chloride, etc. Special quaternary salts are 4-aminopyridinium salts, bis-(quaternary ammonium) [R3N -(CH2) -NR3" R3N -(CH2) -0-(CH2) -NRj ] salts, 4,4 -dialkylbipyridinium salts, cluster quaternary ammonium [e.g., P(C6H4S03"NR4)3] salts, crown-quaternary salts [e.g. (18-crown-6)-(CH2)9PBuj Br ], and chiral V-(4-trifluoromethyl)benzylcinchonium bromide, etc. 

Trialkylamine-boranes will also react with polyolefins to form boron heterocyclics in special cases, the products can be distilled. Triethylamine-borane reacts with cyclododeca-l,5,9-trienes to form perhydro-9b-bora-phenalenes 30, 31, 31a, 45, 47, 48). 

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