Processes for the preparation of 4-amino-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione compounds
申请人:Ge Chuanshen
公开号:US20070004920A1
公开(公告)日:2007-01-04
The present invention provides new processes for the preparation of unsubstituted and substituted 4-amino-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione compounds which are usefuil, for example, for preventing or treating diseases or conditions related to an abnormally high level or activity of TNF-α. The invention can provide improved and/or efficient processes for the commercial production of unsubstituted and substituted 4-amino-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione compounds, including, but not limited to, unsubstituted 4-amino-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione.
amount of various metabolites of thalidomide and related molecules generated during a combination of chiral inversion, hydrolysis, and hydroxylation were observed using liquid chromatography–tandem mass spectrometry and chiroptical spectroscopy. We found that monosubstituted thalidomidederivatives exhibited different time‐dependent metabolic patterns compared with thalidomide. We also revealed that monohydrolyzed