申请人:Arora Sudershan Kumar
公开号:US20090118509A1
公开(公告)日:2009-05-07
A process for the preparation of compounds of Formula I and their pharmaceutically acceptable acid addition salt
wherein,
R
1
is phenyl or substituted phenyl
R
2
is selected from a group consisting of
phenyl which is unsubstituted or substituted with 1 or 2 substituents, each independently selected from Cl, F, or
pyridine, or
naphthalene, or
NHCOR
4
wherein R
4
is aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted heterocyclyl.
R
3
is selected from a group of formula
wherein R
5
is phenyl which is unsubstituted or substituted with 1 or 2 substituents each independently selected from the group consisting of halogen, C
1
-C
4
alkyl, C
1
-C
4
alkoxy, nitro, amino, haloalkyl, haloalkoxy etc.; unsubstituted or substituted benzyl; unsubstituted or substituted heteroaryl; unsubstituted or substituted heteroaroyl; unsubstituted or substituted diphenylmethyl,
n=0-2 and
X═—NCH
3
, CH
2
, S, SO, or SO
2
Such that when R
2
is phenyl, which is unsubstituted or substituted with 1 or 2 substituents, each independently selected from Cl, F; R
5
is not C
1
-C
4
alkyl, or X is not —NCH
3
, CH
2
, S, SO, or SO
2
, when n=1, or X is not —CH
2
when n=0;
comprising the steps of
(a) reacting compound of Formula II
with a chlorinating agent in the presence or absence of catalytic amount of N,N-dimethylformamide to yield the compound of Formula III,
(b) reacting the compound of Formula III with a compound of Formula R
1
H (R
1
is as defined above), in presence of a Lewis acid to obtain the compound of Formula IV,
(c) reacting the compound of Formula IV with a compound of Formula R
2
NH
2
(R
2
is as defined above) in presence of catalytic amounts of an aryl or alkyl sulphonic acid in an organic solvent to obtain the compound of Formula V,
(d) reacting the compound of Formula V with various secondary amines of the Formula R
3
H (R
3
is as defined above) in the presence of formaldehyde and acetic acid in acetonitrile followed by crystallization yield the compound of Formula I,
(e) purifying the compound of Formula I by crystallization,
(f) converting the purified compound of Formula I to a pharmaceutically acceptable acid addition salt.
一种制备I式化合物及其药学上可接受的酸加成盐的方法,其中,
R1是苯基或取代苯基;
R2选自以下组:未取代或取代有1或2个取代基的苯基,每个独立地选自Cl,F,或吡啶;或萘基;或NHCOR4,其中R4是芳基,未取代或取代杂芳基,未取代或取代杂环基;
R3选自以下式的组:
其中R5是未取代或取代有1或2个取代基的苯基,每个独立地选自卤素,C1-C4烷基,C1-C4烷氧基,硝基,氨基,卤代烷基,卤代烷氧基等;未取代或取代苄基;未取代或取代杂芳基;未取代或取代杂芳酰基;未取代或取代二苯甲基,n=0-2,X═—NCH3,CH2,S,SO或SO2;
当R2为未取代或取代有1或2个取代基的苯基,每个独立地选自Cl,F时;当R5不是C1-C4烷基,或当n=1时,X不是—NCH3,CH2,S,SO或SO2,当n=0时,X不是—CH2;
包括以下步骤:
(a)在N,N-二甲基甲酰胺的存在或缺席下,将II式化合物与氯化剂反应,得到III式化合物;
(b)在Lewis酸存在下,将III式化合物与R1H式化合物(其中R1如上定义)反应,得到IV式化合物;
(c)在有机溶剂中,在芳基或烷基磺酸催化下,将IV式化合物与R2NH2式化合物(其中R2如上定义)反应,得到V式化合物;
(d)在乙腈中,在甲醛和乙酸的存在下,将V式化合物与R3H式的各种二级胺(其中R3如上定义)反应,然后结晶,得到I式化合物;
(e)通过结晶纯化I式化合物;
(f)将纯化后的I式化合物转化为药学上可接受的酸加成盐。