| 摘要 |
Prodn. of keto cpds. (I) from the corresp. alkali salts (II) comprises electrodialytic protonation of (II) in a non-aq. medium, without addn. of an acid foreign to the system, to liberate (I). Protonation is pref. carried out in a cell with 2n + 2 chambers with n = 1-50, esp. 1-10. An alkali alcoholate is formed as by-prod. (I) are recovered at (-)20-90 (pref. 10-50) degrees C. If (I) is a beta-keto-ester, it may be subjected to simultaneous electrodialytic ester exchange. |
