Chromone derivatives

Details Chromone derivatives Chromone derivatives

1974-11-18

1979-04-24

Ford, John M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

424283, C07D31122

Patent

active

041511808

ABSTRACT:
The present invention relates to novel chromone derivatives, which are shown by the following general formula ##STR1## wherein n is 0 or 1, m is 0, 1 or 2 when each of R's represents halogen, nitro, straight or branched alkyl having 1 to 6 carbon atoms, cyclic alkyl having 3 to 6 carbon atoms or butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any two adjacent carbon atoms at positions 5, 6, 7 and 8, --COOR', wherein R' is hydrogen, lower alkyl, aralkyl, carboxamide which may be unsubstituted or substituted by at least one lower alkyl or aralkyl, or amino group which may be unsubstituted or substituted by R'CO--, wherein R' is a straight or branched chain alkyl or aryl, or lower alkyl, aralkyl or aryl, m is 0 or 1 when each of R's represents hydroxy, lower alkoxy or R'COO--, wherein R' is a straight or branched chain alkyl or aryl. The novel derivatives are useful as intermediates for chromones having effective anti-allergic action.

REFERENCES:
patent: 3853921 (1974-12-01), Klutchko et al.
patent: 3862143 (1975-01-01), Klutchko et al.
patent: 3872108 (1975-03-01), Nohara et al.

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