Process for producing substituted phthalic acid compounds

Details Process for producing substituted phthalic acid compounds Process for producing substituted phthalic acid compounds

1984-08-17

1987-08-04

Trousof, Natalie

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549243, 549246, 558416, 560146, 562480, 562471, 562473, C07D30789, C07C 51305, C07C 6728

Patent

active

046847375

ABSTRACT:
A process for producing a substituted phthalic acid which comprises heating a substituted tetrahydrophthalic acid compound having a substituent in at least one of the 3-, 4-, 5- and 6-positions in the presence of sulfur to dehydrogenate it, and heat-treating the product in the presence of water optionally together with an organic solvent. As required, the heat-treated product is dehydrocyclized to form a substituted phthalic acid anhydride.

REFERENCES:
patent: 2782221 (1957-02-01), Reed
patent: 4302396 (1981-11-01), Tsujimoto et al.

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