Process for producing ortho-isopropylated phenol derivatives

Details Process for producing ortho-isopropylated phenol derivatives Process for producing ortho-isopropylated phenol derivatives

1994-05-10

1995-05-09

Lone, Werren B.

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

Organic compounds

Oxygen containing

568780, C07C 3750, C07C 3711

Patent

active

054141567

ABSTRACT:
This invention relates to the process for producing ortho-isopropylated phenol derivatives having following general formula (VIII). ##STR1## (in the above formula, R.sub.1 is a hydrogen or a low alkyl group of C.sub.1 -C.sub.4)
A process for producing ortho-isopropylated phenol derivatives (VIII) of the present invention is characterized by obtaining position isomer desired by means of Claisen rearrangement of phenyl allyl ether without catalyst in atmosphere, and then obtaining only one isomer by oxidation and reduction of the above-obtained position isomer. According to the present invention, ortho-alkylated phenol derivatives (VIII) having high purity at low temperature and low pressure can be prepared without producing a by-product and requirement of the complicated separation procedure.

REFERENCES:
patent: 2831898 (1958-04-01), Ecke et al.
patent: 3367981 (1968-02-01), Napolitano
patent: 4447657 (1984-05-01), Firth et al.
patent: 5175375 (1992-12-01), Chang et al.

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