Alkylation process

Details Alkylation process Alkylation process

1984-09-14

1986-08-12

Shaver, Paul F.

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

Organic compounds

Amino nitrogen containing

C07C 8524

Patent

active

046057668

ABSTRACT:
Alkylation of aromatic amines with ethers in the presence of iron oxide catalysts is described. By means of the process aniline, o-toluidine, and the like can be selectively orthoalkylated with such ethers as dimethyl ether, diethyl ether, tetrahydrofuran, and 1,4-dioxane at elevated temperatures in the presence of a catalyst containing iron oxide. With ethers such as dipropyl ether, diisopropyl ether and dibenzyl ether, N-alkylation is the predominant reaction. By appropriately modifying the iron oxide catalyst the process can be rendered selective for the para-alkylation of the amine. An advantage of the process is that the unreacted ether is not extensively decomposed in the process and thus can be recovered for recycle or other use.

REFERENCES:
patent: 3654331 (1972-04-01), Klopfer
patent: 3868420 (1975-02-01), Evans et al.
patent: 4329517 (1982-05-01), Taniguchi et al.
patent: 4351958 (1982-09-01), Takahata et al.
patent: 4359591 (1982-11-01), Fremery et al.

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