Method of preparing pyridinyloxyphenols and derivatives

Details Method of preparing pyridinyloxyphenols and derivatives Method of preparing pyridinyloxyphenols and derivatives

1979-11-13

1981-06-23

Randolph, John D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

71 94, 546261, C07D21363, C07D21368

Patent

active

042752124

ABSTRACT:
Pyridinyloxphenol compounds and derivatives are prepared by reacting a 2(6)- or 4-substituted pyridine intermediate with a hydroquinone reactant and a base, an excess molar amount of base as compared to the molar amount of hydroquinone reactant being employed along with a requisite reaction temperature whereby there is formed no more than 10 mole percent of undesired 1,4-(bis(pyridinyloxy))benzene by-product after no more than about 8 hours. Treatment of the undesired by-product in a similar manner alone or by isolation and recycling in the process also results in substantial conversion of said by-product to the desired mono pyridinyloxphenol compound.

REFERENCES:
patent: 3637720 (1972-01-01), Nishiyama et al.
patent: 3716549 (1973-02-01), Darsow et al.
patent: 4046553 (1977-09-01), Takahashi et al.
Klingsberg, Pyridine and Its Derivatives, Part Three, pp. 571, 576 and 678, Interscience Publishers, 1962. _

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