Process for preparing pyrogallol

Details Process for preparing pyrogallol Process for preparing pyrogallol

1977-12-20

1979-10-30

Lone, Werren B.

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

Organic compounds

Oxygen containing

568650, C07C 3908, C07C 4322

Patent

active

041729609

ABSTRACT:
Pyrogallol is prepared by (A) reacting a halo compound of formula ##STR1## where X represents Br or I, R.sup.1 represents hydrogen, secondary or tertiary alkyl of up to 10 carbon atoms, carboxy or alkoxycarbonyl of 2-5 carbon atoms and R.sup.2 represents hydrogen or alkyl of 1-4 carbon atoms, with an alkali metal alkoxide of formula ROM where M represents an alkali metal and R represents alkyl of 1-4 carbon atoms, to replace each X by OR, and then (B) dealkylating each OR and each OR.sup.2 where R.sup.2 represents alkyl of 1-4 carbon atoms and removing the R.sup.1 group where this is not hydrogen.

REFERENCES:
patent: 2100228 (1937-11-01), Tinkler et al.
patent: 2289886 (1942-07-01), Scherling
patent: 2697732 (1954-12-01), Mavity
patent: 3256336 (1966-06-01), Lange
patent: 3376281 (1968-04-01), Cox
patent: 3585242 (1971-01-01), Roos et al.
English et al., "JACS", vol. 71 (1949), pp. 3310-3313.

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