申请人:Kurimoto Ayumu
公开号:US20110054168A1
公开(公告)日:2011-03-03
A method for preparing compound (4):
wherein m and n are independently an integer of 2 to 5, R
1
is C
1-6
alkyl group, R
2
and R
3
are combined with an adjacent nitrogen atom to form pyrrolidine, morpholine, thiomorpholine, etc., and R
4
is C
1-3
alkyl group, or a pharmaceutically acceptable salt, which is useful as a medicament, which comprises step (a) for preparing compound (2):
wherein m, n, R
1
, R
2
and R
3
are the same as defined above,
or its salt which comprises subjecting compound (1):
wherein k is an integer of 1 or 2, R is hydrogen atom, halogen atom, etc., or a salt thereof to debenzylation reaction,
and then
step (b) for preparing compound (4) or a pharmaceutically acceptable salt which comprises reacting compound (2) or its salt prepared in the above step (a) or salt thereof and compound (3):
wherein R
4
is C
1-3
alkyl group,
in the presence of a boron-containing reducing agent.
制备化合物(4)的方法:其中m和n分别是2到5的整数,R1是C1-6烷基,R2和R3与相邻的氮原子结合形成吡咯烷,吗啉,硫代吗啉等,R4是C1-3烷基,或者是药学上可接受的盐,可用作药物,包括以下步骤:制备化合物(2)的步骤:其中m,n,R1,R2和R3与上述定义相同,或其盐,包括将化合物(1):其中k是1或2的整数,R是氢原子,卤原子等,或其盐,经过脱苄基化反应,然后制备化合物(4)或药学上可接受的盐的步骤,包括在含硼还原剂的存在下,将在上述步骤(a)中制备的化合物(2)或其盐或其盐和化合物(3):其中R4是C1-3烷基,在反应。