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US 4,285,944 AGranted
Pyrano[4,3-e]-as-triazines and corresponding 4-oxides
AssigneeSandoz Ltd.
InventorGregory B. Bennett
Life of this patent
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Abstract
This disclosure describes novel compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently represent hydrogen, halo having an atomic weight of about 19 to 36, lower alkyl, straight chain lower alkoxy, amino, nitro or trifluoromethyl, and R.sub.3 represents hydrogen or lower alkyl, and X represents ##STR2## which are useful as sleep inducers.
Claims18
A compound of the formula ##STR14## wherein R.sub.1 and R.sub.2 each independently represent hydrogen, halo having an atomic weight of about 19 to 36, lower alkyl, straight chain lower alkoxy, amino, nitro or trifluoromethyl, and
- R.sub.3 represents hydrogen or lower alkyl, and
- X represents ##STR15## provided that (i) when one of R.sub.1 and R.sub.2 represents nitro, the other is other than nitro or trifluoromethyl;
- (ii) when R.sub.1 and R.sub.2 represent trifluoromethyl, they are on other than adjacent carbon atoms;
- and
- (iii) when R.sub.1 and R.sub.2 represent t-butyl, they are on other than adjacent carbon atoms, and
- (iv) when one of R.sub.1 and R.sub.2 is trifluoromethyl and the other is t-butyl, they are on other than adjacent carbon atoms.
3 more elements
Dependencies are inferred from the claim text.