Long-acting dihydropyridine calcium antagonists. 9. Structure activity relationships around amlodipine
摘要:
The preparation of a range of 1,4-dihydropyridine analogues of amlodipine has been undertaken and their calcium antagonist activities on rat aorta have been evaluated. Increasing the size of the C5 ester group dramatically reduces calcium antagonist activity, a trend which would be compatible with the carbonyl group of that ester binding to the DHP receptor. Amlodipine analogues with extended C3 ester substituents also have lower potency than amlodipine, possibly because of disruption of a favourable interaction between the protonated amino group on the 2-substituent and the DHP receptor. Replacement of the 6-methyl substituent in amlodipine by alkoxyalkyl groups or electron-withdrawing groups is also detrimental to calcium antagonist activity.
[EN] DIHYDROPYRIDINE COMPOUNDS HAVING SIMULTANEOUS ABILITY TO BLOCK L-TYPE CALCIUM CHANNELS AND TO INHIBIT PHOSPHODIESTERASE TYPE 3 ACTIVITY<br/>[FR] COMPOSES DE DIHYDROPYRIDINE PRESENTANT A LA FOIS LA CAPACITE DE BLOQUER DES CANAUX CALCIQUES DE TYPE L ET LA CAPACITE D'INHIBER L'ACTIVITE DE TYPE 3 DE LA PHOSPHODIESTERASE
申请人:ARTESIAN THERAPEUTICS INC
公开号:WO2004033444A1
公开(公告)日:2004-04-22
The present invention provides compounds that possess inhibitory activity against PDE-3 and L-type calcium channels. The present invention further provides pharmaceutical compositions comprising such compounds and methods of using such compounds for treating cardiovascular disease, stroke, epilepsy, ophthalmic disorder or migraine.
Amlodipine and related analogues thereof are prepared by the following general reaction scheme:
R1 and R2 each independently represent a C1-C4 alkyl group. The process provides for the formation of compounds of formula (1) in good yield and purity. Further, the compounds of formula (1) can be used as calcium channel blockers or as reference standards or reference markers for checking the purity of amlodipine.
Process for making amlodipine, derivatives therof, and precursors therefor
申请人:——
公开号:US20020143046A1
公开(公告)日:2002-10-03
Amlodipine and related analogues thereof are prepared by the following general reaction scheme:
1
R
1
and R
2
each independently represent a C
1
-C
4
alkyl group. The process provides for the formation of compounds of formula (1) in good yield and purity. Further, the compounds of formula (1) can be used as calcium channel blockers or as reference standards or reference markers for checking the purity of amlodipine.
[EN] ISOLATION OF DIHYDROPYRIDINE DERIVATIVE AND PREPARATION SALTS THEREOF<br/>[FR] ISOLATION DE DERIVE DE DIHYDROPYRIDINE ET SELS DE PREPARATION DE CELUI-CI
申请人:EOS ECZACIBASI OZGUN KIMYASAL
公开号:WO2004058711A1
公开(公告)日:2004-07-15
The title compound is isolated in pure form by using a crystallization process and converted to its pharmaceutically acceptable salts. The crystallization process affects stability and purity of the amlodipine salts. All known impurities and one unknown impurity, which forms during the synthesis of the amlodipine salts, were isolated, characterized, and synthesized. A new method allowing the quantitative HPLC analysis of all related impurities of amlodipine salts in a single chromatogram was developed.