Process for preparing 2-carbamoyloxyalkyl-1,4-dihydropyridine derivatives and intermediates useful for the process
申请人:BANYU PHARMACEUTICAL CO., LTD.
公开号:EP0101023A1
公开(公告)日:1984-02-22
A process for preparing a 2-carbamoyloxyalkyl-1,4-dihydropyridine derivative represented by the general formula:
which comprises:
(a) reacting a 3-amino-3-carbamoyloxyalkylacrylic acid derivative represented by the general formula:
with a benzylidene compound represented by the general formula:
(b) reacting the 3-amino-3-carbamoyloxyalkylacrylic acid derivative of the general formula II with an aldehyde comoound reoresented bv the aeneral formula:
and a β-keto-ester compound represented by the general formula:
(c) reacting a 3-carbamoyloxyalkylpropiolic acid derivative represented by the general formula:
with the benzylidene compound of the general formula III and ammonia or its salt: or
(d) reacting the 3-carbamoyloxyalkylpropiolic acid derivative of the general formula VI with the aldehyde compound of the general formula IV, the β-keto-ester compound of the general formula V and ammonia or its salt, and the intermediates of formula II and VI.
一种制备通式为 2-氨基甲酰氧基烷基-1,4-二氢吡啶衍生物的工艺:
其中包括
(a) 将通式为 3-氨基-3-氨基甲酰氧基烷基丙烯酸衍生物与通式为
与通式代表的亚苄基化合物反应:
(b) 将通式 II 的 3-氨基-3-氨基甲酰氧基烷基丙烯酸衍生物与通式......代表的醛化合物和通式......代表的β-酮酯化合物反应:
和通式代表的 β-酮酯化合物反应:
(c) 将通式代表的 3-氨基甲酰氧基烷基丙炔酸衍生物与通式代表的 β-酮酯化合物反应:
与通式 III 的亚苄基化合物和氨或其盐反应:或
(d) 将通式 VI 的 3-氨基甲酰氧基烷基丙炔酸衍生物与通式 IV 的醛化合物、通式 V 的 β-酮酯化合物和氨或其盐以及通式 II 和 VI 的中间产物反应。