| 摘要 |
The present invention relates to a process for the preparation of a compound of formula (1) wherein the process is based on the use of an organolithium reagent and wherein Ra, Rb, Rc and Rd are, independently of each other, selected from the group consisting of H, alkyl, aryl, cycloalkyl, heteroalkyl, heteroaryl, heterocycloalkyl, halogen, carbonyl, alkoxy, hydroxyl, -NR6R7, -SR and -NO2, wherein R6 and R7 are, independently of each other, selected from the group consisting of H, alkyl, aryl, cycloalkyl, heteroalkyl, heteroaryl and heterocycloalkyl, and wherein E is an electrophilic group. The present invention further relates as to a compound obtained or obtainable by said method and to a compound of formula (1) as such. Further, the present invention relates to use of the compound of formula (1) for the preparation of Suvorexant. |
