| 摘要 |
The process for preparing derivatives of formula: <IMAGE> in which R1, R2 and R3, which are identical or different, are chosen from hydrogen and alkyl radicals containing 1 to 4 carbon atoms, by reduction of the corresponding carboxylic esters, is characterised in that the reducing agent is a product chosen from trialkylaluminiums, alkylaluminium hydrides and alkoxyaluminium hydrides which may or may not contain an alkali metal atom, the said reduction reaction being carried out in a dry inert medium, and in that the product obtained is then hydrolysed with water or a water-alcohol mixture.
|
