Diaminoalkyldiphenyl ethers, a process for their preparation and

Details Diaminoalkyldiphenyl ethers, a process for their preparation and Diaminoalkyldiphenyl ethers, a process for their preparation and

1985-11-25

1987-05-05

Shaver, Paul F.

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

Organic compounds

Amino nitrogen containing

C07C14713

Patent

active

046634843

ABSTRACT:
New diaminoalkyldiphenyl ethers of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and denote hydrogen or methyl, but R.sup.1 and R.sup.2 do not simultaneously represent methyl,
are prepared by a process wherein alkyldiphenyl ethers of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the above-mentioned meaning are acetylated, the diacetyl compounds obtained, in aqueous-alcoholic solution or suspension, are converted to the corresponding dioximes with hydroxylamine, the dried dioximes are subjected to a Beckmann rearrangement and thereafter the diacetylaminoalkyldiphenyl ethers formed are hydrolyzed by means of aqueous mineral acids or alkali metal hydroxide solutions to give the diamines.
The new diaminoalkyldiphenyl ethers are used in the preparation of dyestuffs and polyurethanes and serve as monomers for the preparation of polymers.

REFERENCES:
patent: 2765341 (1956-10-01), Wirth et al.
patent: 3228982 (1966-01-01), Washburn et al.
patent: 4179461 (1979-12-01), Marhold et al.
patent: 4370501 (1983-01-01), Lau

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