Method of producing (4R,12aS)-7,9-dihalo-4-methyl-3,4,12,12a-tetrahydro-2H-pyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazine-6,8-diones
US9802959B2 · kind B2 · utility
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Key dates
| Filing date | Mar 28, 2017 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Mar 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing a compound shown by formula (W5):wherein each Hal is independently chloro or bromo, using a novel process for preparing a pyridine derivative represented by formula (W2), wherein R6d is as defined herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.