FUSED PYRIDONE COMPOUND, AND PREPARATION METHOD THEREFOR AND USE THEREOF
申请人:SHANGHAI JEMINCARE PHARMACEUTICALS CO., LTD
公开号:US20220389029A1
公开(公告)日:2022-12-08
Disclosed in the present invention are a fused pyridone compound, and a preparation method therefor and a use thereof. Specifically, the present invention discloses a compound of formula (I-B), an optical isomer thereof and a pharmaceutically acceptable salt thereof, and the use of the compound as a KRAS inhibitor.
A pyrazolopyrimidine derivative of the formula [I]
wherein R1 is an optionally substituted aromatic ring group, an optionally substituted lower alkyl group or an optionally substituted amino group; R2 is an optionally substituted aromatic ring group; R3 is an optionally substituted lower alkyl group; and R4 is a hydrogen atom, a lower alkyl group, a halogen atom, a nitro group or an amino group;
or a pharmaceutically acceptable salt thereof is useful as an antagonist of CRF receptor.