| 摘要 |
The invention relates to novel substituted bicyclo[3.1.0]hexanes of the formula <IMAGE> (I) in which R1 represents, e. g., hydroxyl or alkoxy, R2 to R8 represent, e. g., hydrogen or alkyl, R9 and R10 represent, e.g., methyl or methoxy, X represents, e.g., oxygen, Y represents, e.g., oxygen or sulphur and Z represents, e.g., CH or N, as well as salts of the free acid (R1=OH) and their further functional derivatives, and furthermore to processes and novel intermediates for their preparation, and to their use as herbicides. In addition, a novel process is described for preparing certain 2-keto-bicyclo[3.1.0]hexanes, which are required as intermediates, starting from correspondingly substituted alpha , beta -unsaturated carbonyl compounds (of the methacrolein type) and beta -keto acid esters (of the acetoacetic acid ester type).
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