申请人:——
公开号:US20030028029A1
公开(公告)日:2003-02-06
The present invention relates to a process for preparing piperidine derivative compounds of the formulae:
1
wherein
n is
0
or
1;
R
1
is hydrogen or hydroxy;
R
2
is hydrogen;
or, when n is
0
, R
1
and R
2
taken together form a second bond between the carbon atoms bearing R
1
and R
2
, provided that when n is
1
, R
1
and R
2
are each hydrogen;
R
3
is —COOH or —COOR
4
;
R
4
is an alkyl or aryl moiety;
A, B, and D are the substituents of their rings, each of which may be different or the same, and are selected from the group consisting of hydrogen, halogens, alkyl, hydroxy, alkoxy, and other substituents,
The process comprises providing a regiosomer of the following formula:
2
wherein
Z is —CG
1
G
2
G
3
,
3
m is an integer from
1
to
6;
Q and Y are the same or different and are selected from the group consisting of O, S, and NR
5
;
G
1
, G
2
, and G
3
are the same or different and are selected from the group consisting of OR
8
, SR
8
, and NR
8
R
9
;
R
6
and R
7
are the same or different and are selected from the group consisting of hydrogen, an alkyl moiety, an aryl moiety, OR
8
, SR
8
, and NR
8
R
9
; and
R
5
, R
8
, and R
9
are the same or different and are selected from the group consisting of hydrogen, an alkyl moiety, and an aryl moiety
and converting the regioisomer to the piperidine derivative compound with a piperidine compound.
本发明涉及一种制备式1的哌啶衍生物化合物的过程:其中n为0或1;R1为氢或羟基;R2为氢;或者,当n为0时,R1和R2在承载R1和R2的碳原子之间形成第二个键,前提是当n为1时,R1和R2均为氢;R3为—COOH或—COOR4;R4为烷基或芳基基团;A、B和D是它们的环的取代基,每个取代基可以不同或相同,选自氢、卤素、烷基、羟基、烷氧基和其他取代基的群;该过程包括提供下式2的异构体:其中Z为—CG1G2G3,3m为1至6的整数;Q和Y相同或不同,选自O、S和NR5的群;G1、G2和G3相同或不同,选自OR8、SR8和NR8R9的群;R6和R7相同或不同,选自氢、烷基基团、芳基基团、OR8、SR8和NR8R9;以及R5、R8和R9相同或不同,选自氢、烷基基团和芳基基团的群;并用哌啶化合物将异构体转化为哌啶衍生物化合物。