On April 23, 2020, Luo, Huichao; Ren, Qingyun; Yin, Junjun; Wu, Chunlin; Fan, Yuxin; Mo, Yufeng; Zhang, Yingjun published a patent.HPLC of Formula: 114312-57-1 The title of the patent was Oxazinopyridotriazinediones as influenza virus replication inhibitor and their preparation. And the patent contained the following:
The invention belongs to the field of medicine, and particularly relates to a compound of formula I as a replication inhibitor of influenza virus and a preparation method thereof, a pharmaceutical composition comprising the compound and use of the compound and pharmaceutical composition thereof in treating influenza. The invention provides a compound having formula I or a stereoisomer, a tautomer, an N-oxide, a solvate, a metabolite, a pharmaceutically acceptable salt or a prodrug thereof, that can inhibit influenza virus well, and/or has lower cytotoxicity, better in vivo pharmacokinetic properties and in vivo pharmacodynamic properties. Compounds of formula I wherein Y is O, S, SO, SO2, CR7R8 and NH and derivatives; ring Cy is C3-5 carbocyclic ring, 3- to 8-membered heterocyclic ring and 5- to 10-membered heteroaromatic ring; R1, R2, R3, R4, R5 and R6 are independently H, D, Cl, Br, I, CN, CO2H, etc.; R7 and R8 are independently H, D, F, I, CN, NO2, NH2, etc.; m is 0, 1, 2, 3, and 4; each Rx is independently H, D, F, Br, NO2, C1-6 alkyl, etc.; and stereoisomers, tautomers, N-oxides, solvates, metabolites, pharmaceutically acceptable salts and prodrugs thereof, are claimed. Example compound II was prepared by a multistep procedure (procedure given). The invention compound were evaluated for their influenza virus replication inhibitory activity. From the assay, it was determined that compound II exhibited EC50 value of 4.27 nM. The experimental process involved the reaction of Ethyl 3-fluoro-2-methylbenzoate(cas: 114312-57-1).HPLC of Formula: 114312-57-1
The Article related to oxazinopyridotriazinedione preparation influenza virus replication inhibitor, Heterocyclic Compounds (More Than One Hetero Atom): Triazines and other aspects.HPLC of Formula: 114312-57-1
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