Patent 7863451 was granted and assigned to Celgene on January, 2011 by the United States Patent and Trademark Office.
The present invention concerns new processes for the preparation of substituted 2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolines which are useful for preventing or treating diseases or conditions related to an abnormally high level or activity of TNFα. The invention provides processes for the commercial production of substituted 2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolines including, but not limited to, the therapeutically active 3-(4-amino-1-oxoisoindolin-2-yl)piperidine-2,6-dione.