| 摘要 |
<p>This patent describes a procedure related to the production of compounds with a genral formula (I), where R1 and R2 mean hydrogen or alkyl, R3 and R4 mean alkyl or cycloalkyl, R5 and R6 means hydrogen or methyl and R7 means alkyl, with the use of 1 up to 10 molar percent closed to the solution of catalyst with a general formula (X) in aromatic hydrocarbon, which is liquid at the room temperature and where the symbols R1, R2, R3 and R4 are of the above mentioned meaning and M means alkaline metal.</p> |
