ISOTOPE LABELED 2-ARYLPROPIONIC ACID COMPOUNDS AND PROCESS FOR PRODUCTION OF SAME, AND MOLECULAR PROBE FOR POSITRON EMISSION TOMOGRAPHY AND METHOD FOR IMAGING OF CYCLOOXYGENASE AND THE LIKE USING SAME
申请人:Takashima Misato
公开号:US20120128588A1
公开(公告)日:2012-05-24
Disclosed are: labeled NSAIDs compounds which can be produced within a short time, can be used suitably for a PET method, and enable the imaging of cyclooxygenase-2; and a process for producing the labeled NSAIDs compounds. Specifically disclosed are isotope-labeled 2-arylpropionic acid compounds, each of which is a compound represented by general formula (1) (wherein Ar represents an aryl group which may have a substituent; R
1
represents anyone selected from
11
CH
3
, CH
2
18
F and CF
2
18
F; and R
2
represents a hydrogen atom, or an alkyl group which may have a branch, wherein a compound wherein Ar is a benzene ring, R
1
is
11
CH
3
, and R
2
is a hydrogen atom is excluded), or a pharmaceutically acceptable salt, hydrate, solvate or prodrug thereof.
We have developed a high-efficiency and practical Cu-catalyzed cross-coupling to directly construct versatile α-aryl-esters by utilizing readily available aryl bromides (or chlorides) and malonates. These gram-scale approaches occur with turnovers of up to 1560 and are smoothly conducted by the usage of a low catalyst loading, a new available ligand, and a green solvent. A variety of functional groups
can reductively desymmetrize a large collection of easily available halomalonic esters to α-halo-β-hydroxyesters. These polyfunctionalized tertiary alkyl fluorides, chlorides, and bromides proved to be useful intermediates toward fluorinated drug analogs and polyhalogenated monoterpenes. The facile intramolecularepoxidation of the chiral chloride and bromide products has also enabled expeditious access