申请人:HOECHST-ROUSSEL PHARMACEUTICALS INCORPORATED
公开号:EP0581107A1
公开(公告)日:1994-02-02
This application relates to a new process for the preparation of a product of the formula
wherein
Ris loweralkyl;
R¹is hydrogen, loweralkyl, lowercycloalkyl, lowercycloalkylloweralkyl, lowerbicycloalkyl, aryl or arylloweralkyl;
R²is loweralkyl, lowercycloalkyl, lowercycloalkylloweralkyl, lowerbicycloalkyl, aryl or arylloweralkyl; or
R¹ and R²taken together with the nitrogen atom to which they are attached from a 3,4-dihydro-2(1H)-isoquinoline group;
Xis loweralkyl, loweralkoxy, halogen or trifluoromethyl; and
mis 0, 1 or 2;
which process comprises
(a) contacting a compound of formula II
wherein R, X and m are as defined above and R³ is loweralkyl, with aluminum chloride followed by tartaric acid
to afford a compound of formula III
wherein R, X and m are as defined above;
(b) contacting the reaction mixture containing the compound of Formula III either
(1) with an isocyanate of the formula R¹NCO and obtaining a product of the formula I wherein R² is hydrogen; or
(2) with a compound of formula IV
wherein R⁴ is hydrogen or loweralkyl in the presence of a carboxylic acid of the formula
R⁵COOH
wherein R⁵ is loweralkyl to afford a compound of formula V
wherein R, R⁴, X and m are as above;
contacting the reaction mixture containing the compound of Formula V with a compound of the formula
R¹R²NH
wherein R¹ and R² are as above; and
isolating the product of Formula I.
本申请涉及一种制备以下式子产品的新工艺
式中
Ris低级烷基;
R¹是氢、低级烷基、低级环烷基、低级环烷基、低级双环烷基、芳基或芳基低级烷基;
R² 是低级烷基、低级环烷基、低级环烷基低级烷基、低级双环烷基、芳基或芳基低级烷基;或
R¹和 R² 连同它们所连接的氮原子来自 3,4-二氢-2(1H)-异喹啉基团;
X为低级烷基、低级烷氧基、卤素或三氟甲基;以及
误差为 0、1 或 2;
该工艺包括
(a) 与式 II 的化合物接触
其中 R、X 和 m 如上文所定义,R³ 为低级烷基,与氯化铝接触,然后与酒石酸接触
得到式 III 的化合物
其中 R、X 和 m 如上定义;
(b) 将含有式 III 化合物的反应混合物与下列任一种物质接触
(1) 与式 R¹NCO 的异氰酸酯接触,得到式 I 的产物,其中 R² 为氢;或
(2) 与式 IV 的化合物
其中 R⁴ 是氢或低级烷基,在有式羧酸存在的情况下
R⁵COOH
其中 R⁵ 是低级烷基,得到式 V 的化合物
其中 R、R⁴、X 和 m 如上;
将含有式 V 化合物的反应混合物与一种式的化合物接触
R¹R²NH
其中 R¹ 和 R² 如上;以及
分离出式 I 的产物。