Methods of producing substituted (4R,12AS)-7-hydroxy-4-methyl-6,8-dioxo-3,4,6,8,12,12A-hexahydro-2H-pyrido[1′,2′:4,5]pyrazino[2,1-B][1,3]oxazine-9-carboxamides
US9321789B2 · kind B2 · utility
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Key dates
| Filing date | Oct 20, 2014 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Oct 20, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing a compound represented by formula (Y1) or (Y2)wherein Rx is an optionally substituted carbocyclyl lower alkyl, or the like or a salt thereof, using a novel process for preparing a pyridone derivative represented by formula (X4) wherein R1d, R2d, and R4d are as defined herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.