申请人:Buschmann Helmut Heinrich
公开号:US20080269524A1
公开(公告)日:2008-10-30
The invention concerns a method for the isolation of a stereoisomer from a mixture comprising the two stereoisomers of the general formulae (I-A) and (I-A′) and/or the two stereoisomers of the general formulae (I-B) and (I-B′)
in which
R
1
, R
2
and R
3
, identical or different, are selected from the group consisting of —H, —F, —Cl, —C
1
-C
6
-alkyl, —S—C
1
-C
6
-alkyl, —OH, —O—C
1
-C
6
-alkyl, —O—C
1
-C
6
-alkylenephenyl, —OCO—C
1
-C
6
-alkyl, —OCON(C
1
-C
6
-alkyl)
2
and —O—SiR
8
R
9
R
10
(in which R
8
, R
9
and R
10
, identical or different, are —C
1
-C
6
-alkyl or -phenyl);
R
4
is —H or —C
1
-C
6
-alkyl;
R
5
is —C
1
-C
6
-alkyl; and
R
6
and R
7
, identical or different, are —H or —C
1
-C
6
-alkyl;
or their salts with organic or inorganic acids;
comprising the step
(a) manipulating the mixture ratio of the stereoisomers in the mixture so that at least one of the stereoisomers is present in an enantiomeric excess.
该发明涉及一种从包含通式(I-A)和(I-A')的两个立体异构体和/或通式(I-B)和(I-B')的两个立体异构体的混合物中分离立体异构体的方法,其中R1、R2和R3,相同或不同,选自由—H、—F、—Cl、—C1-C6-烷基、—S—C1-C6-烷基、—OH、—O—C1-C6-烷基、—O—C1-C6-烷基苯基、—OCO—C1-C6-烷基、—OCON(C1-C6-烷基)2和—O—SiR8R9R10(其中R8、R9和R10,相同或不同,为—C1-C6-烷基或苯基);R4为—H或—C1-C6-烷基;R5为—C1-C6-烷基;R6和R7,相同或不同,为—H或—C1-C6-烷基;或它们与有机或无机酸的盐;包括步骤(a)操纵混合物中立体异构体的混合比,以使至少一个立体异构体以对映异构体过量的形式存在。