Method of producing 2,6-dialkyl- and 2,6-diaralkyl-substituted d

Details Method of producing 2,6-dialkyl- and 2,6-diaralkyl-substituted d Method of producing 2,6-dialkyl- and 2,6-diaralkyl-substituted d

1970-10-28

1976-03-23

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260621M, 260621H, 260619R, C07C 3902

Patent

active

039460860

ABSTRACT:
A method of producing 2,6-dialkyl- and 2,6-diaralkyl-substituted derivatives of p-cresol of the general formula ##SPC1##
Wherein R signifies an alkyl group having from 4 to 12 carbon atoms or ##SPC2##
Comprising subjecting phenol to alkylation with olefines having from 4 to 12 carbon atoms or with styrene at a temperature of 50.degree.-150.degree.C in the presence of a catalyst, namely, aluminum, taken in an amount of 0.1-5 wt.% of phenol. 2,6-Dialkyl phenol or 2,6-diaralkyl phenol resulting after from the alkylation is treated with a mixture of formaldehyde and dimethylamine or with a product of their interaction having the formula ##EQU1## at a temperature of 20.degree.-100.degree.C with subsequent catalytic hydrogenolysis of N,N-dimethyl(3,5-dialkyl-4-hydroxybenzyl)/amine or N,N-dimethyl(3,5-diaralkyl-4-hydroxybenzyl/amine at a temperature of 80.degree.-200.degree.C., molar ratio of hydrogen to the product being treated of 1-5:1 and space velocity of 0.1-2 hour.sup..sup.-1.
The products produced by said method feature a high degree of purity, and they can be employed as effective inhibitors of thermooxidation degradation of polymers and hydrocarbon fuels, and also as intermediates for producing p-cresol, and 2-alkyl- and 2-aralkyl-substituted derivatives of p-cresol.

REFERENCES:
patent: 2841623 (1958-07-01), Norton et al.
patent: 3006969 (1961-10-01), Koetiz
patent: 3075832 (1963-01-01), Ecke et al.
patent: 3367981 (1968-02-01), Napolitino
patent: 3592951 (1971-07-01), Zoveski

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