| 摘要 |
<p>This invention relates to a process for the preparation of compounds of the general formula: II in which X represents oxygen, sulphur, the group or the group -CR8R9-, R1, R2, R3 and R4 represent hydrogen, hydroxy, halogen, alkyl (1-6C) alkoxy (1-6 C), or trifluoromethyl. R7 stands for hydrogen or alkyl (1-4 C), and R8, R9 stand for hydrogen or methyl, characterized in that a compound of the general formula: III is condensed with vinylmethylketone . The compounds so produced are useful as intermediates in the synthesis of compounds having useful pharmacological properties.</p> |
