Aminohydroxy Compounds

Delayed-Cure Catalysts for Permanent Press Resins 

ANGUS Chemical Company markets the following aminohydroxy compounds  

TRIS AMINO brand of trls (hydroxymethyl)-aminomethane 

These aminohydroxy compounds in the form of their salts are extremely useful as catalysts for permanent press resins. The utilization of these compounds alone or in combination with metal salts such as magnesium chloride or zinc nitrate promotes balanced curing action with a wide range of textile resins. These catalysts provide  

The amine salt catalysts are nearly colorless and exhibit little tendency to turn yellow in storage. Nor do they turn the fabric yellow or otherwise affect its color. The range in base strengths of the amines and the choice of acid for the salt permits tailoring the activity of the catalysts to provide the shelf stability and curing rate required. 

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Since both o- and p-aminohydroxy compounds are powerful reducing agents, they should be allowed to react under an inert atmosphere. 

The 4-hydroxythiocoumarins may be readily nitrated at the 3-position, using nitric acid in either acetic acid or chloroform solution.The 3-nitro derivatives may be reduced to amines using standard conditions and these aminohydroxy compounds (43) used as a source of further fused thiocou-... 

Carbonylation was applied in oligomerizations and polycondensations as well, even though most of the previous work focused on monocarbonylation reactions. Chaudhari and colleagues reported a palladium-catalyzed carbonylation-polycon-densation reaction of aromatic diiodides and aminohydroxy compounds [117]. With their methodology, alternating polyesteramides were prepared in chlorobenzene with l,8-diaza-bicyclo[5.4.0]undec-7-ene (DBU) as a base under 3 bar of carbon monoxide at 120 °C (Scheme 2.8). 

Heating aryl azides in a mixture of a carboxylic acid and polyphosphoric acid affords a useful, fairly general method of fusing an oxazole ring to aromatics and heterocycles.The method suffers from the limitation that bicyclic azides in which the azido substituent is a- to the ring junction give 0-diacetyl derivatives of the 1,4-aminohydroxy compound as, for example, the formation of 98 from a-naphthyl azide ... 

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