Trisubstituted benzene derivatives and a method for the preparat

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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548237, 548238, 548239, C07D26304, C07D30910

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active

046395350

ABSTRACT:
Disclosed are trisubstituted benzene derivatives of the formula ##STR1## wherein B is selected from the group consisting of --NHCOC(CH.sub.3).sub.3, 1,3-oxazolinyl and --CONHR, wherein R is methyl, phenyl, or t-butyl; Y is selected from the group consisting of CO.sub.2 H, CHO, CO.sub.2 R' and COR', wherein R' is a lower alkyl having from 1 to 4 carbon atoms; and A is H or tetrahydropyran. Said compounds are valuable intermediates in the preparation of certain anti-allergic chromone or thiochromone-5-oxamic acid derivatives.

REFERENCES:
patent: 3933844 (1976-01-01), Augstein et al.
patent: 3952013 (1976-04-01), Hazard et al.

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