Industrial Synthesis of 2,5-Dimethylpiperid-4-one.-A novel and efficient kilogram-scale synthesis of the title piperidone (VI), a key compound in the synthesis of the local anesthetic richlocain, starting from readily available ethyl acetoacetate is given. -(MURZAGULOVA, K. B.; AKHMEDOVA, SH. S.; YABLOKOV, S. K.; MEZENTSEVA, N. G.; SHARUFKANOV, A. SH.; PRALIEV, K. D.; TURMUKHANOVA, M. ZH.; Khim. -Farm. Zh. 32 (1998) 9, 52-53; Kazakhskii gos. nats. univ. im. Al'-Farabi Resp. Kaz., Alma-Ata, Kazakhstan; RU)
Die Reduktion der Nitrosoverbindung (I) zur Diaminoverbindung (II) wird durch katalytische Hydrierung mit Raney‐ Nickel in wäßrigem Medium bei 0,5 ‐ 4 atü und 40 ‐ 65°C durchgeführt.
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