申请人:——
公开号:US20030171590A1
公开(公告)日:2003-09-11
The present invention discloses processes 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.
One process comprises providing a regioisomer 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
;
X
3
is halogen, OR
15
, SR
15
, NR
15
R
16
, OSO
2
R
15
, or NHSO
2
R
15
;
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
, R
9
, R
15
, and R
16
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. Another process for producing piperidine derivative compounds comprises providing an &agr;,&agr;-disubstituted-methylbenzene derivative having the formula:
4
wherein
X
1
is a halogen, trialkyl or triaryl tin, trialkyl or triaryl borate, trialkyl silicon, alkylhalo silicon, a substituted sulfonic ester, or substituents useful in organometallic coupling reactions
and converting the &agr;,&agr;-disubstituted-methylbenzene derivative to the piperidine derivative compound with a piperidine compound. In yet another process, a 4-(&agr;,&agr;-disubstituted)-toluic acid derivative having the formula:
5
wherein
X
2
is a halogen; an alkali metal oxide; a moiety having the formula —OR
10
; a moiety having the formula —SR
10
; or an amine; and
R
10
is selected from the group consisting of hydrogen, an alkyl moiety, and an aryl moiety
is provided and converted to the piperidine derivative compound with a piperidine compound.
本发明披露了制备以下式的
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,但当n为1时,R1和R2分别为
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,并且从
氢、卤素、烷基、羟基、烷
氧基和其他取代基的群中选择。其中一种过程包括提供以下式的区域异构体:其中Z为—CG1G2G3,3m为1到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;X3为卤素、OR15、SR15、NR15R16、
OSO2R15或NHSO2R15;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、R9、R15和R16相同或不同,选自
氢、烷基基团和芳基基团,并将区域异构体转化为
哌啶衍
生物化合物。另一种制备
哌啶衍
生物化合物的方法包括提供具有以下式的α,α-二取代
甲基苯衍
生物:其中X1为卤素、三烷基或三芳基
锡、三烷基或三芳基
硼酸酯、三烷基
硅、烷基卤
硅、取代
磺酸酯或有机
金属偶合反应中有用的取代基,并用
哌啶化合物将α,α-二取代
甲基苯衍
生物转化为
哌啶衍
生物化合物。在另一种方法中,提供具有以下式的4-(α,α-二取代)-
甲苯酸衍
生物:其中X2为卤素;碱
金属氧化物;具有式—OR10的基团;具有式—SR10的基团;或者胺;并用
哌啶化合物将其转化为
哌啶衍
生物化合物。