Process for producing 1,4-dihydroxy-2-arylnaphthoate

Details Process for producing 1,4-dihydroxy-2-arylnaphthoate Process for producing 1,4-dihydroxy-2-arylnaphthoate

1992-08-17

1993-08-31

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

C07C 6976

Patent

active

052411036

ABSTRACT:
Pure 1,4-dihydroxy-2-arylnaphthoate is prepared in high yield by allowing 1,4-dihydroxy-2-naphthoic acid to react with triarylphosphite in the presence of an acid catalyst selected from organic and inorganic acids and crystallizing from a mixed solvent consisting essentially of lower alcohols and water until 1,4-dihydroxy-2-naphthoic acid is isolated and is further purified by crystallization from a mixed solvent consisting essencially of lower alcohols, water and extraction solvent, i.e., alkyl-substituted aromatic hydrocarbons or halogen-substituted aliphatic or aromatic hydrocarbons.

REFERENCES:
Chemical Abstracts, vol. 111, Abstract No. 77668, 1989.
Chemical Abstracts, vol. 111, Abstract No. 77669, 1989.
Chemical Abstracts, vol. 111, Abstract No. 77670, 1989.

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