| abstract |
The invention relates to new 2,3-benzodiazepine derivatives of general Formula (I), (wherein R<SUP>1 </SUP>stands for methyl, formyl, carboxy, cyano, -CH-NOH, -CH-NNHCONH<SUB>2 </SUB>or -NR<SUP>5</SUP>R<SUP>6</SUP>, wherein R<SUP>5 </SUP>and R<SUP>6 </SUP>independently from each other represent hydrogen or lower alkyl or together with the nitrogen atom, they are attached to, form a 5- or 6-membered, saturated or unsaturated heterocyclic ring optionally containing one or more further nitrogen, sulfur and/or oxygen atom(s); R<SUP>2 </SUP>is nitro or amino; R<SUP>3 </SUP>stands for hydrogen, lower alkanoyl or CO-NR<SUP>7</SUP>R<SUP>8</SUP>, wherein R<SUP>7 </SUP>and R<SUP>8 </SUP>independently from each other stand for hydrogen, lower alkoxy, lower alkyl or lower cycloalkyl or together with the nitrogen atom, they are attached to, form a 5- or 6-membered, saturated or unsaturated heterocyclic ring optionally containing one or more further nitrogen, sulfur and/or oxygen atom(s); R<SUP>4 </SUP>is hydrogen or lower alkyl; the dotted lines have the following meaning: if R<SUP>3 </SUP>and R<SUP>4 </SUP>are not present, the bond between positions C<SUP>8 </SUP>and C<SUP>9 </SUP>is a single bond and the bond between positions C<SUP>8 </SUP>and N<SUP>7 </SUP>is a double bond; if R<SUP>3 </SUP>and R<SUP>4 </SUP>are present, the bonds between positions C<SUP>8 </SUP>and C<SUP>9 </SUP>and between position C<SUP>8 </SUP>and N<SUP>7 </SUP>are single bonds; and if R<SUP>3 </SUP>is present and R<SUP>4 </SUP>is missing, the bond between positions C<SUP>8 </SUP>and C<SUP>9 </SUP>is a double bond and the bond between positions C<SUP>8 </SUP>and N<SUP>7 </SUP>is a single bond) and salts thereof. The invention compounds have neuroprotective effect. |