Preparation of N,N-dialkarylamines

Details Preparation of N,N-dialkarylamines Preparation of N,N-dialkarylamines

1994-01-31

1994-12-06

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564401, C07C20904

Patent

active

053712900

ABSTRACT:
A process for the preparation of N,N-dialkylarylamines (I) by reacting arylamines (II) with alcohols (IIIa) or dialkyl ethers (IIIb) in the presence of an oxygen acid of phosphorus or in the presence of an ammonium salt thereof as catalyst, comprises reacting the oxygen acid of phosphorus with an arylamine (IV) before the reaction is commenced. The invention also relates to the regeneration of the catalyst by occasionally interrupting the reaction and treating the catalyst phase at from 100.degree. to 300.degree. C. with steam or water.

REFERENCES:
patent: 2991311 (1961-03-01), Thoma
patent: 3969411 (1976-07-01), Schneider et al.
patent: 4150054 (1979-01-01), Schneider
patent: 5113018 (1992-05-01), Kurano
patent: 5159115 (1992-10-01), Pappas
Chemical Abstracts, vol. 115, abstract No. 31575p (Nov. 1991).
Houben-Weyl, Methoden Der Organischen Chemie, vol. XI/I, (1991) pp. 134-143, Stuttgart 1957.
European Search Report, EP92/119691 (Apr. 1993).

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