Process for the preparation of compounds of formula (IV):
wherein R
1
, R
2
, R
3
and R
4
, which may be identical or different, each represent a hydrogen atom, a linear or branched (C
1
-C
6
)alkyl group, a linear or branched (C
1
-C
6
)alkoxy group, a fluorine atom, a chlorine atom, a protected amine group, a protected hydroxyl group, an alkoxycarbonyl group in which the alkoxy group is linear or branched (C
1
-C
6
), or a CF
3
group, or R
1
═R
4
═H and R
2
and R
3
together with the carbon atoms carrying them form a 1,3-dioxolane group,
R
5
represents a saturated or unsaturated, linear or branched (C
1
-C
6
)alkyl group, a linear or branched (C
1
-C
6
)hydroxyalkyl group in which the hydroxyl function is protected, or a CO
2
R
7
group in which R
7
is a linear or branched (C
1
-C
6
)alkyl group,
R
6
represents a cyano group or a CO
2
R
8
group in which R
8
is a linear or branched (C
1
-C
6
)-alkyl group.
Application in the synthesis of ivabradine, addition salts thereof with a pharmaceutically acceptable acid and hydrates thereof.
制备化合物IV的过程:其中R1、R2、R3和R4,可以相同也可以不同,每个代表一个
氢原子,一个直链或支链(C1-C6)烷基基团,一个直链或支链(C1-C6)烷
氧基团,一个
氟原子,一个
氯原子,一个保护胺基团,一个保护羟基团,一个烷
氧羰基基团,其中烷
氧基团是直链或支链(C1-C6),或一个
CF3基团,或R1 = R4 = H,而R2和R3连同携带它们的
碳原子形成一个1,3-二
氧杂
环戊烷基团,R5代表一个饱和或不饱和的直链或支链(C1-C6)烷基基团,一个直链或支链(C1-C6)羟基烷基基团,其中羟基功能被保护,或一个CO2R7基团,其中R7是一个直链或支链(C1-C6)烷基基团,R6代表一个
氰基团或一个CO2R8基团,其中R8是一个直链或支链(C1-C6)烷基基团。应用于伊维布拉定的合成,以及与药用可接受酸的加合物和
水合物。