Gelbard, Georges; Rumpf, Paul published an article in 1969, the title of the article was N-Alkylated diethylenetriamines and triethylenetetramines.Electric Literature of 2160-93-2 And the article contains the following content:
The synthesis of polyamines H2N(CH2)2(NHCH2CH2)nNH2 selectively alkylated on the terminal NH2 group by reductive alkylation with ketones. With diethylenetriamine good yields of 1,7-dialkylated polyamines were obtained. Also, 1,10-dialkylated polyamines were obtained with triethylenetetramine. With excess NH3, the yield of dialkylated product decreased in favor of monoalkylated polyamines. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Electric Literature of 2160-93-2
2,2′-(tert-Butylazanediyl)diethanol(cas:2160-93-2) belongs to alcohols. In general, the hydroxyl group makes alcohols polar. Those groups can form hydrogen bonds to one another and to most other compounds. Owing to the presence of the polar OH alcohols are more water-soluble than simple hydrocarbons. Electric Literature of 2160-93-2
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts