0-Aminoethylsulfuric acid

N-Cyanoguanidine, 35, 69 Cyanohydrin formation, 33, 7 3-Cyano-6-isobutyl-2(l)-pyridone, 32, 34 3-Cyano-6-methyl-2(1)-pyridone, 32, 32 l-Cyano-3-a-naphthylurea, 36, 11 1-Cyano-3-phenylurea, 36, 8 Cyclic acyloins, 36, 82 Cyclization, (3-aminoethylsulfuric acid to ethylenimine, 30, 38 1,2-benzo-3,4-dihydrocarbazole from phenylhydrazine and a-tetralone,... 

Ethylenimine has been prepared from /8-bromoethylamine hydrobromide by reaction with silver oxide, potassium hydroxide, or sodium methoxide from j3-chloroethylamine hydrochloride by reaction with sodium methoxide or sodium hydroxide and from 8-aminoethylsulfuric acid by reaction with sodium hydroxide. ... 

Cyclization, of -aminoethylsulfuric acid to ethylenimine, 38 l,2-benzo-3,4-dihydrocarbazole from phenylhydrazine and a-tetralone, 91... 

Preparation of -aminoethylsulfuric acid [31]. Ethanolamine (6 moles, 366 gm) and 98 % sulfuric acid (6 moles, 600 gm) are separately diluted with half their weight of water and cooled in an ice bath. The amine is slowly added to the acid with constant stirring in a flask also cooled in an ice bath. The mixture is boiled under reduced pressure with the aid of an aspirator. Boiling stones are used to prevent lumping. When the temperature of the liquid reaches 140°-160°C, the heating is stopped and the material solidifies. The product is not isolated, but methanol or ethanol is added in order to wash the product free from any remaining sulfuric acid or ethanolamine. The yield is approximately 761-804 gm (90-95 %). 

N-jS-Aminoethylethylenimine, 30, 39 d-Aminoethylsulfuric acid, 30, 38 l-(Aminomethyl)cyclohexanol, acetic acid salt, 34, 22... 

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