Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1979-10-30
1981-09-22
Ford, John M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
544150, 544375, C07D31186, C07D41310, C07D40510
Patent
active
042909546
ABSTRACT:
A tetrahydroxanthone derivative represented by the general formula: ##STR1## wherein R is a hydrogen atom, a hydroxyl, cyano, lower alkyl, lower alkoxy, lower acyloxy, benzoyloxy or tetrazolyl group, or ##STR2## (R.sub.3 is a hydrogen atom, R.sub.4 is a hydrogen atom, a phenyl group which may be optionally substituted, or a tetrazolyl group; or R.sub.3 and R.sub.4 commonly form a ring together with the adjacent nitrogen atom and another nitrogen atom or an oxygen atom); R.sub.1 is a hydrogen or halogen atom, a lower alkyl, cyano, carboxyl or tetrazolyl group, or ##STR3## (R.sub.5 is a hydrogen atom, R.sub.6 is a phenyl group which may be optionally substituted, or a tetrazolyl group; or R.sub.5 and R.sub.6 commonly form a ring together with the adjacent nitrogen atom and an oxygen atom); and R.sub.2 is a hydrogen or halogen atom, or a lower alkyl group; with the proviso that neither R nor R.sub.1 is a hydrogen atom; when R is --CONH.sub.2, R.sub.1 and R.sub.2 are not respectively a hydrogen atom nor a hydrogen or halogen atom, or a lower alkyl group; and R.sub.2 and R.sub.1 are not respectively a hydrogen atom nor a halogen atom or a lower alkyl group. Exhibits anti-allergic, anti-inflammatory, analgesic, inhibitory and asthma-treating activities.
REFERENCES:
patent: 3862141 (1975-01-01), Klutchko et al.
patent: 4061768 (1977-12-01), Gorvin
patent: 4078078 (1978-03-01), Barnes et al.
patent: 4127573 (1978-11-01), Gorvin
patent: 4221800 (1980-09-01), Warren et al.
Japanese Laid-Open Application Nos. 53/98969, 52/29677.
Kawamura Kiyoshi
Kunieda Hisashi
Machida, deceased Naoki
Miwa, heir by Takayasu
Nagakura Masahiko
Ford John M.
Kowa Company Limited
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