| 摘要 |
The invention relates to compounds of the formula <IMAGE> in which R1 and R2 are identical or different and are hydrogen or aralkyl, R3 is alkyl, cycloalkyl or cycloalkylalkyl, R4 and R5 are identical or different and are hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl or a heterocyclic radical and R6 and R7 are identical or different and are hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, aryl or arlkyl or R6 and R7, together with the carbon atom carrying them, are cycloalkyl. The novel compounds are prepared by a carbonyl olefination according to Wittig. They are intermediates for the preparation of pharmaceuticals, in particular of inhibitors of renin and HIV protease. |
