US 12,286,389 B2
Crystalline form a of 2, 2-bis(4-fluorophenyl)-2-phenylacetamide and preparation method therefor and application thereof
Guobin Ren, Shenzhen (CN); Dongxu Yi, Shenzhen (CN); Weijie Ji, Shenzhen (CN); and Jiajun Huang, Shenzhen (CN)
Assigned to SHENZHEN JINGTAI TECHNOLOGY CO., LTD, Guangdong (CN)
Filed by SHENZHEN RENTAI PHARMATECH LTD., Guangdong (CN)
Filed on Sep. 28, 2021, as Appl. No. 17/487,047.
Application 17/487,047 is a continuation of application No. PCT/CN2019/080419, filed on Mar. 29, 2019.
Prior Publication US 2022/0033347 A1, Feb. 3, 2022
Int. Cl. C07C 233/11 (2006.01)
CPC C07C 233/11 (2013.01) [C07B 2200/13 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A crystal form A of 2,2-bis(4-fluorophenyl)-2-phenylacetamide, wherein the X-ray powder diffraction thereof using Cu-Kα radiation has characteristic peaks at 2θ diffraction angles of 10.4±0.2°, 11.8±0.2°, 18.8±0.2° and 21.3±0.2°.