A process for the preparation of dihydrolysergic acid esters of the formula
wherein
R is alkyl of up to 3 carbon atoms and the substituent in the 8-position can be in the a- or β-position, comprising reacting the corresponding acid amide with an alcohol at temperatures of 20° to 55°C for 8 to 50 hours in the presence of an acid or an acidic ion exchange resin at a pH of 0-1.
一种制备式中二氢
麦角酸酯的工艺
式中
R 是最多 3 个碳原子的烷基,8 位上的取代基可以是 a 或 β 位上的取代基,包括在酸或酸性离子交换
树脂存在下,在 20° 至 55°C 温度下,使相应的酸酰胺与醇在 pH 值为 0-1 的条件下反应 8 至 50 小时。