A process for the preparation of a compound of the formula 1
wherein R is hydrogen, loweralkyl, loweralkoxy or trifluoromethyl; R1 is hydrogen or loweralkyl; R2 is loweralkyl; R3 is hydrogen, loweralkyl, loweralkoxy or trifluoromethyl; and m is 1 or 2, which comprises the steps of:
(a) contacting a compound of the formula 11
wherein R, R1, R2, R3, and m are as above and X is iodo, bromo or chloro with formic acid in the presence of a metal catalyst; and
(b) isolating the product.
The products produced by the process described have memory enhancing, analgetic and antidepressant properties.
一种制备式 1 化合物的工艺
其中 R 是氢、低级烷基、低级烷氧基或三
氟甲基;R1 是氢或低级烷基;R2 是低级烷基;R3 是氢、低级烷基、低级烷氧基或三
氟甲基;m 是 1 或 2,该工艺包括以下步骤
(a) 与式 11 的化合物接触
其中 R、R1、R2、R3 和 m 如上,X 为
碘、
溴或
氯。
(b) 分离产物。
通过所述工艺生产的产品具有增强记忆、镇痛和抗抑郁的特性。