US 12,187,689 B2
Crystalline forms of 3-substituted 1,2,4-oxadiazole
Pottayil Govindan N. Sasikumar, Bangalore (IN); and Seetharamaiah Setty S. Naremaddepalli, Bangalore (IN)
Assigned to Aurigene Oncology Limited, Bangalore (IN)
Filed by Aurigene Oncology Limited, Bangalore (IN)
Filed on May 15, 2023, as Appl. No. 18/197,414.
Application 18/197,414 is a continuation of application No. 17/461,512, filed on Aug. 30, 2021, granted, now 11,680,051.
Application 17/461,512 is a continuation of application No. 16/755,439, granted, now 11,136,300, previously published as PCT/IB2018/057840, filed on Oct. 10, 2018.
Claims priority of application No. 201741036169 (IN), filed on Oct. 11, 2017.
Prior Publication US 2023/0278970 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07D 271/06 (2006.01)
CPC C07D 271/06 (2013.01) [C07B 2200/13 (2013.01)] 32 Claims
 
1. A method for preparing a crystalline compound, comprising the steps of:
a) providing a mixture comprising the crystalline compound and a first solvent;
b) crystallizing the compound from the mixture by:
i) contacting the mixture with an anti-solvent; or
ii) heating the mixture for a period of time; and
wherein the crystalline compound and the compound have the structure of formula (I):

OG Complex Work Unit Chemistry