847871-99-2Relevant academic research and scientific papers
amine to the crystal and its preparation method
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Paragraph 0037; 0038, (2017/06/24)
The invention provides a hemihydrate crystal form V of lenalidomide, which has characteristic X diffraction ray peaks in the X-ray powder diffractogram when 2theta is 12.0+/-0.2 degrees, 13.7+/-0.2 degrees, 24.7+/-0.2 degrees and 27.5+/-0.2 degrees. The invention also provides a preparation method of the hemihydrate crystal form V of lenalidomide, which comprises the following steps: (1) dissolving lenalidomide in a polar organic solvent, wherein the polar organic solvent is selected from one or more of aliphatic sulfone solvents aliphatic amide solvents; (2) dropwisely adding the solution obtained in the step (1) into 0-30 DEG C water to precipitate the expected crystal form from the solution; and (3) separating the crystal solid obtained in the step (2). The hemihydrate crystal form of lenalidomide has the advantages of high yield, high purity and high stability.
A CRYSTALLINE FORM OF LENALIDOMIDE AND A PROCESS FOR ITS PREPARATION
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Page/Page column 18-19, (2010/06/17)
The present invention relates to a novel crystalline form of lenalidomide having formula (I) and chemically known as 3-(4-amino-1-oxo-1,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione. The present invention further relates to a process for the preparation of said novel form and its use in pharmaceutical preparations for the treatment of autoimmune disease, inflammation, inflammatory disease and diseases such as cancer, in particular the management of multiple myeloma.
