INTERMEDIATES USEFUL FOR MAKING TETRABENAZINE COMPOUNDS
申请人:Rishel Michael James
公开号:US20080306269A1
公开(公告)日:2008-12-11
A method of preparing a tetrabenazine compound (TBZ compound) having structure I comprising the steps of reacting a nucleophilic alkenyl species with aldehyde compound II and oxidizing the resultant allylic alcohol to provide enone III. The protecting group P
1
on the tetrahydroisoquinoline nitrogen is removed and the resultant deprotected intermediate is induced to undergo an amino cyclization reaction to provide a product TBZ compound having structure I. The method may be used to prepare either enantiomeric form of tetrabenazine; (+)-tetrabenazine or (−)-tetrabenazine. Alternatively the method may be adapted to provide a mixture enriched in one tetrabenazine enantiomer, a racemic mixture, or a diastereomeric mixture of tetrabenazine compounds. In addition, the present invention provides novel synthetic intermediate compositions which may be used to prepare either or both enantiomers of tetrabenazine, derivatives of tetrabenazine, and analogs of tetrabenazine.
ALPHA-FLUOROALKYL TETRABENAZINE AND DIHYDROTETRABENAZINE IMAGING AGENTS AND PROBES
申请人:Rishel Michael James
公开号:US20090142265A1
公开(公告)日:2009-06-04
The present invention provides novel alpha-fluoroalkyl compounds having structure I and the corresponding dihydrotetrabenazine compounds IV
wherein R
1
is a C
1
-C
10
fluorinated aliphatic radical; R
2
is hydrogen or a C
1
-C
10
aliphatic radical; and R
3
is hydrogen or a C
1
-C
10
aliphatic radical. The alpha-fluoroalkyl compounds are provided in both racemic and enantiomerically enriched forms and may comprise either or both of fluorine-18 and fluorine 19. The alpha-fluoroalkyl compounds are shown to possess high affinity for VMAT-2, a biomarker implicated in human diabetes. The alpha-fluoroalkyl compounds comprising a fluorine-18 group are useful as PET imaging agents targeting the VMAT-2 biomarker. The non-radiolabled alpha-fluoroalkyl compounds are useful as probes for the discovery of PET imaging agents.
ALPHA-FLUOROALKYL DIHYDROTETRABENAZINE IMAGING AGENTS AND PROBES
申请人:Rishel Michael James
公开号:US20090142276A1
公开(公告)日:2009-06-04
The present invention provides novel alpha-fluoroalkyl dihydrotetrabenazine compounds I
wherein R
1
is a C
1
-C
10
fluorinated aliphatic radical; R
2
is hydrogen or a C
1
-C
10
aliphatic radical; R
3
is hydrogen or a C
1
-C
10
aliphatic radical; and R
4
is a C
1
-C
10
aliphatic radical, a C
3
-C
10
cycloaliphatic radical, or a C
3
-C
10
aromatic radical. The alpha-fluoroalkyl dihydrotetrabenazine compounds are provided in both racemic and enantiomerically enriched forms and may comprise either or both of fluorine-18 and fluorine 19. The alpha-fluoroalkyl dihydrotetrabenazine compounds are believed to possess high affinity for VMAT-2, a biomarker implicated in human diabetes. The alpha-fluoroalkyl dihydrotetrabenazine compounds comprising a fluorine-18 group are useful as PET imaging agents targeting the VMAT-2 biomarker. The non-radiolabled alpha-fluoroalkyl dihydrotetrabenazine compounds are useful as probes for the discovery of PET imaging agents.
INTERMEDIATES FOR ALPHA-FLUOROALKYL TETRABENAZINE AND DIHYDROTETRABENAZINE IMAGING AGENTS AND PROBES
申请人:Rishel Michael James
公开号:US20090143587A1
公开(公告)日:2009-06-04
The present invention provides novel fluorophilic compounds having structure VII
wherein Q is a carbonyl group, a protected carbonyl group, a hydroxy methine group, or a protected hydroxy methine group; R
1
is a C
1
-C
20
aliphatic, C
2
-C
20
cycloaliphatic, or C
2
-C
20
aromatic radical comprising at least one functional group susceptible to reaction with nucleophilic fluoride ion or an electrophilic fluorinating agent; R
2
is hydrogen or a C
1
-C
10
aliphatic radical; and R
3
is hydrogen or a C
1
-C
10
aliphatic radical. The fluorophilic compounds are provided in both racemic and enantiomerically enriched forms and are useful as intermediates in the preparation of novel PET imaging agents and probes useful in the discovery and performance assessment of PET imaging agents. The fluorophilic compounds are particularly useful in the preparation of PET imaging agents and probes having a high affinity for VMAT-2, a biomarker implicated in human diabetes and other illnesses such as Parkinson's disease.
Alpha-fluoroalkyl tetrabenazine and dihydrotetrabenazine imaging agents and probes
申请人:General Electric Company
公开号:EP2594568A1
公开(公告)日:2013-05-22
The present invention provides novel alpha-fluoroalkyl compounds having structure I and the corresponding dihydrotetrabenazine compounds IV and intermediates useful in the preparation of such compounds. The alpha-fluoroalkyl compounds are provided in both racemic and enantiomerically enriched forms and may comprise either or both of fluorine-18 and fluorine 19. The alpha-fluoroalkyl compounds are shown to possess high affinity for VMAT-2, a biomarker implicated, for example, in human diabetes. The alpha-fluoroalkyl compounds comprising a fluorine-18 group are useful as PET imaging agents targeting the VMAT-2 biomarker. The non-radiolabled alpha-fluoroalkyl compounds are useful as probes for the discovery of PET imaging agents.
本发明提供了具有结构 I 的新型α-氟烷基化合物和相应的二氢四苯嗪化合物 IV 以及用于制备此类化合物的中间体。本发明提供的α-氟烷基化合物既有外消旋形式,也有对映体富集形式,可以包含氟-18 和氟-19 中的一种或两种。α-氟烷基化合物对 VMAT-2 具有很高的亲和力,VMAT-2 是一种与人类糖尿病等有关的生物标志物。包含一个氟-18 基团的 α-氟烷基化合物可用作针对 VMAT-2 生物标志物的 PET 成像剂。非辐射α-氟烷基化合物可用作发现 PET 成像剂的探针。