US 11,807,648 B2
Process for preparing substituted polycyclic pyridone derivative and crystal thereof
Setsuya Shibahara, Amagasaki (JP)
Assigned to SHIONOGI & CO., LTD., Osaka (JP)
Filed by Shionogi & Co., Ltd., Osaka (JP)
Filed on Jan. 19, 2022, as Appl. No. 17/578,743.
Application 17/578,743 is a division of application No. 16/310,897, granted, now 11,261,198, previously published as PCT/JP2017/022478, filed on Jun. 19, 2017.
Claims priority of application No. 2016-121453 (JP), filed on Jun. 20, 2016.
Prior Publication US 2022/0251107 A1, Aug. 11, 2022
Int. Cl. C07D 498/14 (2006.01)
CPC C07D 498/14 (2013.01) [C07B 2200/13 (2013.01)] 5 Claims
 
1. A compound of the formula (II′):

OG Complex Work Unit Chemistry
or a salt thereof.