|Title:|| Benzoxadiazoles and benzothiadiazoles|
|Abstract:||Compounds of formula I, ##STR1## wherein X is oxygen or sulphur, and R.sub.1 -R.sub.6 are various substituents. The compounds are useful for treating coronary insufficiency, intermittent claudication, cerebrovascular insults, spasms in muscles and hypertension.|
|Inventor(s):|| Neumann; Peter (Berne, CH) |
|Assignee:|| Sandoz Ltd. (Basle, CH) |
|Filing Date:||May 29, 1984|
|Claims:||1. A compound having the formula ##STR93## wherein R.sub.1 ' is hydrogen or C.sub.1-6 alkyl; |
R.sub.2 ' and R.sub.5 ', independently, are hydrogen or C.sub.1-6 alkyl;
R.sub.3 ' and R.sub.4 ', independently, are COOR.sub.7 ' or ##STR94## each R.sub.7 ', independently, is C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.7-10 phenylalkyl, C.sub.3-6 alkoxyalkyl, C.sub.2-6 -hydroxyalkyl or C.sub.4-8 hydroxyalkoxyalkyl;
A is C.sub.1-6 alkylene;
each R.sub.8 ' and R.sub.9 ', independently, is C.sub.1-6 alkyl or C.sub.7-10 phenylalkyl; and
X is oxygen or sulphur, with the proviso that at least one of R.sub.3 ' and R.sub.4 ' is COOR.sub.7 '
where R.sub.7 ' is C.sub.2-6 hydroxyalkyl or C.sub.4-8 hydroxyalkoxyalkyl, or a pharmaceutically acceptable acid addition salt of a basic compound of the above formula.
2. A compound of claim 1 wherein R.sub.7 ' is C.sub.2-6 hydroxyalkyl.
3. A compound of claim 1 wherein R.sub.7 ' is C.sub.4-8 hydroxyalkoxyalkyl.
4. A compound of claim 1 wherein R.sub.1 ' is hydrogen.