The present invention relates to an amorphous solid form of (4S)-7-(3,5-dimethylisoxazol-4-yl)-4-pyridin-2-yl-4,5-dihydroimidazo[1,5,4-de][1,4]benzoxazin-2(1H)-one, and processes for its preparation, which is an inhibitor of BET proteins such as BRD2, BRD3, BRD4, and BRD-t and is useful in the treatment of various diseases such as cancer.
本发明涉及(4S)-7-(3,5-二甲基
异恶唑-4-基)-4-
吡啶-2-基-4,5-二氢
咪唑并[1,5,4-de][1,4]苯并恶嗪-2(1H)-酮的无定形固体形式及其制备工艺,该物质是BET蛋白(如BRD2、BRD3、BR
D4和BRD-t)的
抑制剂,可用于治疗癌症等多种疾病。