Process for making triethylene diamines

Details Process for making triethylene diamines Process for making triethylene diamines

1978-10-30

1980-08-05

Tovar, Jose

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544351, C07D47808

Patent

active

042163226

ABSTRACT:
There is disclosed a novel process for the preparation of 1,4-diazabicyclooctane dihydrohalides having the formula ##STR1## wherein each R is independently selected from the group consisting of hydrogen, lower alkyl, aryl, aralkyl, and cycloalkyl, and X is chlorine or bromine, said process comprising heating at a temperature of at least about 100.degree. C. and in a dipolar aprotic solvent certain novel dihaloalkylene diamines. Neutralization of the dihydrohalides provides the corresponding 1,4-diazabicyclooctane free bases.
Also disclosed are certain novel 1,4-diazabicyclooctane diammonium dihalides formed as intermediates in the above process and a process for their conversion to the 1,4-diazabicyclooctane dihydrohalides and free bases thereof.
The 1,4-diazabicyclo compounds produced in accordance with the invention find particular utility as catalysts in the preparation of polyurethanes from organic polyols and polyisocyanates.

REFERENCES:
Shishkin, G. V. Chemical Abstracts vol. 86, 29873y (1977).

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