| 摘要 |
The title cpds'. acyl gps. contain 1-2C-atoms and are sepd. by >=4C-atoms in the alkane. Acyloxy-alkane carboxylic acids, with 2H-atoms alpha to the carboxyl gp. and in which the acyl residue of the acyloxy gp. contains 1-2C-atoms and is sepd. from the carboxyl gp. by >=2C-atoms, are electrochemically condensed in a solvent mixture. The latter consists of 60-98 wt.% lower alcohols, 0-30 wt.% (cyclic) N-alkyl-substd. amides or lower alkane carboxylic acids and opt., 0.30 wt.% H2O, pref., methanol and formamide. Pref., the degree of neutralization of the carboxylic acid is kept at >10% and simultaneously, the current density is kept at >10, esp. 25-50 amp/dm2. Process gives yield of approx. 80%.
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