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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 517042Generated: October 30, 2026

5-Difluoromethympyrazine-2-carboxylic acid → 5-Difluoromethyl-pyrazine-2-carboxylic acid [3-((4R,5R)-2-amino-5-fluoro-4-methyl-5,6-dihydro-4H-[1,3]oxazin-4-yl)-4-fluoro-phenyl]-amide

https://huagongshe.com/reaction/517042

Reaction equation

Participants

RoleNameHCIDCharge
Reactant5-Difluoromethympyrazine-2-carboxylic acidHCID 57468575—
Reactant(4R,5R)-4-(5-amino-2-fluoro-phenyl)-5-fluoro-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-ylamineHCID 86672004—
Product5-Difluoromethyl-pyrazine-2-carboxylic acid [3-((4R,5R)-2-amino-5-fluoro-4-methyl-5,6-dihydro-4H-[1,3]oxazin-4-yl)-4-fluoro-phenyl]-amideHCID 66558771—

Reaction Steps

The condensation of (4R,5R)-4-(5-amino-2-fluoro-phenyl)-5-fluoro-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-ylamine (intermediate A8.2) and 5-difluoromethyl-pyrazine-2-carboxylic acid (CAS 1174321-06-2, US2009209757) following procedure I yielded the title compound as a light yellow solid. MS (ISP): m/z=398.2 [M+H]+.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09115098B2
Source datasetuspto-grants-2015_08
ORD IDord-2b3d075bc0094d9688a77ef54f3b29a4
Source noteuspto-grants-2015_08