申请人:D'Ambra E. Thomas
公开号:US20070010677A1
公开(公告)日:2007-01-11
The present invention relates to a process for preparing piperidine derivative compounds of the formulae:
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:
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以下式的哌啶衍生物化合物的方法:
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,但当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为它们的环的取代基,每个取代基可以不同或相同,并从由氢、卤素、烷基、羟基、烷氧基和其他取代基组成的群中选择。
该方法包括提供以下式的区域异构体:
其中,m为1到6的整数;Q和Y相同或不同,且从O、S和NR5的群中选择;G1、G2和G3相同或不同,且从OR8、SR8和NR8R9的群中选择;R6和R7相同或不同,且从氢、烷基基团、芳基基团、OR8、SR8和NR8R9的群中选择;R5、R8和R9相同或不同,且从氢、烷基基团和芳基基团的群中选择,并使用哌啶化合物将区域异构体转化为哌啶衍生物化合物。