3-oxo-1,4-benzothiazine derivatives

Details 3-oxo-1,4-benzothiazine derivatives 3-oxo-1,4-benzothiazine derivatives

1994-11-30

1996-08-20

Ford, John M.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Heterocyclic carbon compounds containing a hetero ring...

544 52, 514 90, C07D27916, A61K 3154

Patent

active

055479529

ABSTRACT:
This invention relates to the compounds of the formula [I] which are useful for the treatment of cataracts, and the synthetic intermediates of the formula [II], ##STR1## wherein R.sup.1 is hydroxy which can be protected by a protective group;

REFERENCES:
patent: 3923709 (1975-12-01), Worley
patent: 4078062 (1978-03-01), Krapcho
Chemical Abstracts, vol. 112, No. 23, Jun. 4, 1990, Abstract No. 216950 M. Takakazu et al "Preparation of 3-oxo-1, 4-benzothiazine derivatives for removal of active oxygen species and for inhibition of lipid peroxide formation" of JP-A-89 287 077 (1989).

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